SAFETY

Types of safety precautions

Safety precautions

Dive safety

Suunto Nautic is a dive computer designed to be used for recreational scuba diving. The device displays essential information before, during and after the dive to enable safe decision making. Suunto Nautic can be used as a standalone product or in combination with the Suunto Tank POD, which measures the tank pressure and transmits the pressure reading information to the dive computer. The combination of Suunto Nautic and the Suunto Tank POD is categorized as Personal Protective Equipment under the EU Regulation 2016/425 and protects against risks listed under PPE Risk Category III (a): substances and mixtures which are hazardous to health.

Suunto strongly recommends that you do not engage in any diving activity type without proper training and a complete understanding and acceptance of the risks. Always follow the rules of your training agency.

Make sure you fully understand how to use your dive instrument and what its limitations are by reading all the printed documentation and the online user manual. Always remember that you are responsible for your own safety.

Getting started

To get the most out of your Suunto Nautic device, take some time to customize its features and displays. Make absolutely sure that you are familiar with your computer and have it set up as you want before getting into the water.

Starting your Suunto Nautic for the first time is quick and simple.

1. Keep the up button pressed to wake up the device.

2. Press the OK button to begin the setup wizard.

   

3. Scroll up or down and press the OK button to select your language.

   

4. Carefully read the warning that pops up, scroll down and confirm you understand it by pressing OK.

5. Follow the wizard to complete initial settings. Scroll up or down to select values. Press the OK button to accept a value and go to the next step.

When ready, the device goes to surface mode.

Button functions

Suunto Nautic has four buttons you can use to navigate through displays and features. Short pressing or long pressing them gets you to different functionalities. At the surface and during the dive:

Suunto app

With the Suunto app, you can further enrich your Suunto Nautic experience. Pair your device with the mobile app to sync your dives, get weather and tide info or download maps.

To pair your device with Suunto app:

1. Ensure your device Bluetooth is on. Under the settings menu, go to Connectivity » Discovery and enable it if it is not already.
2. Download and install Suunto app on your compatible mobile device from the iTunes App Store, Google Play in addition to several popular app stores in China.
3. Start Suunto app and turn on Bluetooth if it is not on already.
4. Tap the watch icon in the upper-left of the app screen and then tap “PAIR” to pair your device.
5. Verify the pairing by typing the code that is displayed on your dive computer in the app.

Dive logs in Suunto app

In the Suunto app, you can add and edit additional details for each dive of your dive log.

You can edit the following fields:

• Dive weights
• Dive suit
• Dive buddy
• Dive center
• Visibility
• Current
• Environmental features
• Marine encounters
• Comfort
• Buoyancy
• State of mind

The Weights field allows you to record the amount of weight used during the dive. Other fields let you select one or more options from predefined lists. Some fields also allow you to add your own custom values or remove existing ones.

The list of selectable values is shared across all dive logs. If you delete a value from one dive log, it will also be removed from all other dive logs.

Settings

From the surface view, scroll up to get access to all of the general device settings via the Control panel.

Device settings

You can adjust the device settings like units, wearing direction, language, time and date by pressing the up button and enter Control panel > Device settings.

Software updates

Software updates add important improvements and new features to your device.

When an update is available and your device is connected with Suunto app, the software update will be downloaded to the device automatically. The status of this download can be viewed in Suunto app.

Once the software is downloaded to your device, you can install it by selecting the notification that is displayed in the Control panel or from Control panel > Device settings > Software update.

You will also be informed about the software update when you connect the device to a charger or power off the device.

Flashlight

Your Suunto Nautic has a flashlight that you can use as a backup light. To turn the flashlight on, go to Control panel > Flashlight and toggle it on.

You can also turn the flashlight on or off during diving by long pressing the up button.

Button lock

You can lock the buttons before or during your dive by keeping the down button pressed. Once locked, you cannot perform any action that requires button interaction. However, you can use the buttons to acknowledge alarms and gas switch even when the buttons are locked.

To unlock everything, keep the down button pressed again.

You can also lock the buttons from the Control panel > Button lock before diving.

Display brightness and power states

The Brightness setting determines the overall intensity of display brightness: Low, Medium or High.

The display enters Always-On Display (AOD) mode after 5 minutes of inactivity and Sleep mode after 1 hour. Any button press wakes the device from Sleep, and from AOD it can be woken by a button press or by raising your wrist. Water contact will automatically wake it up.

The device enters Deep Sleep (power-off) after 48 hours of inactivity and can only by activated by pressing top button.

The brightness can be adjusted from the Control panel > Brightness or while diving, by short pressing the up button.

Units

To change the device unit system, go to Control panel > Device settings > Units.

Under unit settings, you have the option of selecting metric or imperial as a global setting: it will affect all measurements.

You can also set the unit system for specific measurements, e.g. you can use metric for depth, and imperial for tank pressure.

Tones and vibration

Tones and vibration alerts are used for device notifications. Both tones and vibration alerts can be adjusted from the settings under General » Tones.

Wear orientation

You can flip the device display to have the buttons either on the left or on the right side of the dive computer, making it easier to wear on either arm. Change the button orientation under Device settings > Wear orientation.

Select Buttons left if you are wearing the dive computer on your right arm and Buttons right if you are wearing it on your left arm.

The default wear orientation is Buttons left.

Language

You can change your device language and unit system from the settings under Control panel > Device settings > Language.

Bluetooth connectivity

Suunto Nautic uses Bluetooth technology to send and receive information from your mobile device when you have paired your dive computer with the Suunto app. Same technology is also used when pairing PODs and sensors.

However, if you do not want your device to be visible for Bluetooth scanners, you can activate or deactivate the discovery setting from the settings under Connectivity » Discovery.

The Bluetooth can also be completely turned off by activating airplane mode.

Pairing heart rate sensor

You can pair your Suunto Nautic device with a heart rate belt to track your heart rate during diving.

To pair a heart rate belt:

1. Go to Control panel > Connectivity.
2. Select Pair new device.

3. Select the sensor from list.

   

Once the sensor is paired, your dive computer searches for it as soon as you start your dive.

You can see the full list of paired devices in the dive computer from the settings under Connectivity > Paired devices.

From this list, you can remove (unpair) the device if needed. Select the device you want to remove, and select Forget.

For information on how to pair your Suunto Nautic with the Suunto Tank POD, see How to install and link a Suunto Tank POD.

Device lock

You can lock your device after setting a passcode in Device settings > Device lock.

This function is useful if you are not wearing your device and you do not want anyone else to use the device or modify your settings. If you set a passcode, your device will be automatically locked when the device goes idle, that is, after 15 minutes of inactivity, and you can unlock it with the passcode.

To set a passcode:

1. Go to Device settings > Device lock.
2. Toggle on the Use passcode option.

3. Set your six-digit passcode including numbers 1, 2, 3 and 4 by means of the device buttons. Long press the back button if you want to clear the numbers.

   

4. Confirm the passcode.

5. A popup indicates if the passcode setting is successful. If the passcodes don't match, try again.

Once you set a passcode, your device automatically locks when the device goes idle. To unlock it, press any buttons and enter your passcode.

To set a new passcode, select the Change passcode option in the Passcode menu.

If you enter an incorrect passcode 5 times in a row, you have to reset the device and set a new passcode.

To turn off the passcode:

1. Go to Device settings > Device lock.
2. Toggle off the Use passcode option.
3. Enter your current passcode.

If you turn off the passcode, your device forgets it and you have to set a new passcode after turning it back on.

Time and date

You can set time and date during the initial startup of your device. After this, your device uses GPS time to correct any offset. To change these settings, go to Control panel > Device settings > Time/date.

Once you have paired with Suunto app, your device gets updated time, date, time zone and daylight-saving time from mobile devices.
In the Settings, under General » Time/date, select Auto time update to toggle the feature on and off. If you toggle the feature off, you can manually adjust the time and date. You can also change the time and date formats.

Device info

You can check details of your device software and hardware from the settings under General » About.

Resetting tissues

You have the possibility to reset tissue compartments, that is, to clear the data regarding the residual nitrogen and helium after a dive. After tissue reset, the previous dives have no effects on the dive algorithm calculations.

To reset tissues, go to Device settings > Reset tissues.

Resetting your device

Suunto devices have two types of reset available to address different issues:

• the first one, the soft reset, also known as the restart.
• the second one, the hard reset, also known as the factory reset.

Soft reset (restart):

Performing a restart on your device might help with the following situations:

• the device is not responding to any button presses.
• the display is either frozen or blank.
• there is no vibration, e.g., during button presses.
• the device functionalities are not working as expected.

Press and hold all four buttons for 12 seconds and release them to perform a soft reset.

There are specific circumstances under which the soft reset might not solve the issue and the second type of reset may be performed. If the above has not helped with the issue you were aiming to solve; the hard reset might help.

The hard reset (factory reset):

The factory reset will restore your device to the default values. It will erase all data from your device, including exercise data, personal data and settings that have not been synced to Suunto app. After a hard reset, you must go through the initial setup of your Suunto device.

Performing a factory reset on your device may be performed in the following situations:

• a Suunto Customer Support representative has asked you to do so as part of the troubleshooting procedure.
• the soft reset did not solve the issue.
• the battery life of your device is significantly reducing.
• the device is not connecting to GPS and other troubleshooting has not helped.
• the device has connectivity issues with Bluetooth devices (e.g., Smart Sensor or mobile app) and other troubleshooting has not helped.

The factory reset of your device is done via the Settings on your device. Select General and scroll down to Reset settings. All data on your device will be deleted during the reset. Initiate the reset by selecting Reset.

Dive setup

You can find all the dive related settings by pressing the down button. All dive settings are mode-specific. Changes made to algorithm settings, gases, or alarms apply only to the selected dive mode and do not affect other modes.

Surface screen and dive options

The surface screen is the same for all dive modes, but each mode has several dive mode specific options that can be adjusted to your diving needs.

A set of icons appears on the surface screen, depending on what you are using with the dive mode, such as heart rate, Tank POD and GPS. The following elements can be seen on the display:

• Max depth from previous dive
• Dive time from previous dive
• Time at surface
• Tank POD icon if linked and active
• GPS signal if enabled
• Heart rate belt icon if enabled
• Remaining battery percentage
• Temperature
• Switch window content

GPS signal: The arrow icon (connected GPS) flashes gray while searching and turns green once a signal is found. We recommend to wait for the GPS icon to turn green before jumping into the water for accurate GPS location.

Heart rate: The heart icon flashes gray while searching and once a signal is found, it turns into green. See Pairing heart rate sensor.

Tank POD: The tank icon is only visible if you have a Tank POD paired to your gas.

Automatic dive start

Suunto Nautic has an automatic start functionality that recognizes pressure increase and water contact. The device enters dive state from the surface screen or from any other device screen:

• When in contact with water and the absolute pressure equals to your set dive start depth (the default start depth is 1.2 m / 4 ft).
• Or if no water contact is recognizable but the absolute pressure equals to your set dive start depth (the default start depth is 1.2 m / 4 ft) + 1.8 m (5.9 ft).

Scuba dives automatically end after the set Dive end time (the default time is 5 min) and when:

• When in contact with water and the absolute pressure equals to or is less than your set dive start depth (the default start depth is 1.2 m / 4 ft).
• Or if no water contact is recognizable but the absolute pressure equals to or is less than your set dive start depth (the default start depth is 1.2 m / 4 ft) + 1.8 m (5.9 ft).

If submerged from any non-diving screen, Suunto Nautic automatically enters the dive mode you have last configured.

Dive modes

Suunto Nautic has two scuba dive modes that come with pre-defined settings to prepare for certain type of diving.

Single gas:

This dive mode is best suited for no-decompression recreational diving with only one gas, Air or Nitrox.

• One active gas, up to five disabled gases
• Air or Nitrox mixes
• Tank POD pairing to active gas

Multigas:

This dive mode is best suited for technical diving with multiple gases.

• Up to five enabled and disabled gases
• Air, Nitrox and Trimix mixes
• Tank POD pairing to multiple gases

Dive settings

For Additional settings, scroll down from the surface screen.

GPS

To track the start and end point of your dive and to get a more accurate dive route, you need to enable GPS in the Dive settings. Make sure the GPS arrow icon turns green in the pre-dive screen before starting your dive to get an accurate location.

You can track your dive route with Suunto Nautic. The underwater route tracking is based on GPS, accelerometer, gyroscope, magnetometer and pressure sensor. The algorithm has been developed by using large amount of data from real dives, data analytics and machine learning.

To track your underwater route while diving, you need to enable both the GPS and the Dive route settings. The dive route is not visible in your dive computer. It will be synced to your dive log in Suunto app when connected to your mobile phone.

Note that the dive route signal can be compromised in the following situations: overhead environments like caves or wrecks, indoor pools or with poor on nonexistent GPS signal.

Dive start depth

Sets the depth threshold for starting and ending a dive. The default depth is 1.2 m (4 ft) and the maximum is 3.0 m (9.8 ft).

Dive end time

Once you are shallower than the set start depth for the dive, Suunto Nautic will start calculating the elapsed time at the surface. You can set your desired time under Dive end time. Once this time has elapsed, your dive ends automatically. If you continue diving before the set end time, the dive continues. You can define the time between 1 and 10 min. The default setting is 5 min.

Water type

Select the water type you are diving in. You can choose fresh water, salt water or default standardized depth measurement, the EN13319 option.

Key information during diving

During diving, your device displays the following information:

Decompression information:

The decompression area on the screen is fixed and shows the following data in the following situations:

No Decompression Limit (NDL): It shows the time remaining in minutes at the current depth until mandatory decompression stops are required. If NDL time is above 99 minutes, it is displayed as >99. When the NDL time is 5 minutes or less, a mandatory alarm is triggered and the display area is highlighted until resolved or replaced with decompression information.

Read more about the mandatory alarms in Mandatory dive alarms.

Deco time: If exceeding the NDL time, an alarm is triggered and the NDL time is replaced with the optimum ascent time in minutes (TTS). A Deco badge appears, and the stop field shows either your next decompression stop or the ceiling value, depending on the decompression profile. An alarm is also triggered that can be confirmed by pressing any button. Read more about decompression diving in Decompression dives.

Stop area: If a safety stop or deco stop is required during the dive, a stop timer counting down the required stop time in minutes and seconds will be shown in the window. The stop depth range will be indicated in the depth area. Once the stop is completed, Stop done is displayed. You can adjust the safety stop time to be 3, 4 or 5 minutes (the default length is 3 minutes) in the Algorithm settings.

Surface time: When surfacing, the stop area is replaced with a surface timer. It shows the elapsed time between surfacing from a dive and beginning a descent for the subsequent dive. It shows the time in minutes and seconds up to one hour. Above one hour, the time is displayed in hours and minutes up to 24 hours, and after that, hours up to seven days and then only in days.

Ascent rate: During a dive, the bar in the middle of the screen indicates how fast you are ascending. One bar step corresponds to 2 m (6.6 ft) per minute.

The bar is color coded to show the following:

• Gray indicates ascent rate is less than 2 m (6.6 ft) per minute

• Green indicates ascent rate is between 4 m (13 ft) per minute and 8 m (26 ft) per minute

• Yellow indicates ascent rate is over 8 m (26 ft) per minute

• Red indicates ascent rate is 10 m (33 ft) per minute

• Highlighted red indicates ascent rate is over 10 m (33 ft) per minute for 5 sec or longer

Switch window for scuba diving

The switch window on the left of the dive screen can contain different types of information that can be changed by short pressing the OK button.

You can customize the information shown in the switch window in Dive settings > Customization> Switch window.

The list shows all views currently assigned to the switch window. Select a view to edit it. The add new view option is available at the bottom (unless the maximum of 10 views is reached).

Adding new view

1. Select a view type (large or double field). Once selected, view type cannot be changed.

2. Select a field to assign a function from the available list. Repeat it for the second field (if using a double field layout).

3. Press Save view to confirm.

Some fields, for example, Tissues, Compass, and Stopwatch are available as large fields only.

Editing a view

When editing a view:

• The layout type is fixed.
• Fields can be changed at any time.

• Delete view replaces the Save view option.

The following items can be configured to the switch window:

Switch window	Switch window content	Explanation
	Max depth	The maximum depth reached during the current dive.
	Clock	The time in a 12- or 24-hour format, based on the time format you set under Time/date settings.
	Tank pressure	The tank pressure in the set unit (bar or PSI) for your active gas if linked to a Tank POD.
	Gas consumption (L/min or cu ft/min)	Gas consumption refers to your real-time consumption rate of gas during a dive. The actual gas consumption rate is measured in liters per minute (cubic feet per minute) and calculated for the current depth. See Gas consumption for more information.
	Gas time	Gas time refers to the time you can stay at the current depth. See Gas time for more information.
	Time to surface (TTS)	The time to surface refers to the ascent time in minutes to ascend to the surface with given gases including all required decompression stops.
	Actual ppO2 and MOD	The current partial pressure of the active gas. Partial pressure is the fraction of oxygen in the gas at the current depth. The value is always in absolute atmospheres (ATA) of pressure. (1 ATA = 1.013 bar) If the ppO2 exceeds the preset limit for the gas, the switch window turns yellow and triggers an alarm. If the ppO2 exceeds the maximum partial pressure limit of 1.6, the switch window turns red until you ascend shallower than the MOD depth. Maximum Operating Depth (MOD) is the depth at which the partial pressure of oxygen (ppO2) of the gas mix exceeds a safe limit.
	Average depth	The average depth of the current dive is calculated from the moment the start depth is exceeded until the dive ends.
	Gradient factors	The Gradient Factor value you have defined in the Algorithm settings. See Algorithm settings and Gradient Factors for more information about the dive algorithm and Gradient Factors.
	GF99 / Surface GF	GF99 is the current gradient factor at your present depth, expressed as the percentage of the controlling compartment’s M-value. This represents the relationship between ambient pressure and dissolved nitrogen in the tissues. On Gas is displayed when tissue tension is less than the inspired inert gas pressure. GF99 is shown in yellow when GF High is exceeded. GF99 is shown in red (warning) at 100% and remains red for all values above 100%. Surface GF is the Gradient Factor value you would have if you surfaced immediately. If GF99 exceeds your GF High setting, Surface GF is shown in yellow (caution). If GF99 exceeds 100%, Surface GF is shown in red (warning).
	Contingency Delta 5 / @ 5	The predicted change in TTS if you were to stay at the current depth for 5 more minutes. The predicted TTS if you remain at the current depth for 5 more minutes.
	Ascent speed	Ascent rate in m/min.
	Tissues graph	Displays inert gas tensions in tissue compartments. The fastest tissues are at the top, the slowest at the bottom. The bars combine nitrogen and helium; the pressure increases to the right. Green = below ambient pressure Yellow = above ambient pressure Red = above M-value limit
	Ceiling	When mandatory decompression stops are required, a ceiling value appears in the switch window. Suunto Nautic shows the ceiling value always from the deepest stop. You must not ascend above the ceiling during your ascent. Read more about decompression diving in Decompression dives.
	Active gas	The current active gas.
	OTUCNS	OTU: Oxygen tolerance unit. It is used to measure the whole-body toxicity, caused by prolonged exposure to high oxygen partial pressures. Suunto Nautic alarms you when the daily recommended limit reaches 250 (caution) and 300 (warning). CNS: Central nervous system toxicity. The CNS value is a measure of how long you have been exposed to elevated partial pressures of oxygen (ppO2), displayed as a percentage of a maximum allowable exposure. Suunto Nautic alarms you when CNS% reaches 80% (caution) and when the 100% limit (warning) is exceeded.

Gases

In both Single gas and Multigas modes, the default active gas is Air. In the Gases menu you can edit your active gas or create a new gas.

You cannot delete your active gas. If you want to change your active gas you need to either modify the existing gas or create a new gas and set the gas state to active. If you change the active gas, the previous gas will be disabled (Single gas mode) or enabled (Multigas mode).

In Single gas mode, you can have only one active gas. When creating a new gas, you can choose to make it your active gas or save your most used gas mixture (e.g., NX32) for easy enabling once you need it.

Edit gas

When diving with gas mixtures, the oxygen fraction and partial pressure limits must be entered to ensure accurate nitrogen and oxygen calculations and a correct maximum operating depth (MOD).

In single gas mode, you can edit the oxygen percentage (O₂%) of the active gas. The oxygen fraction can be adjusted between 21% and 100%.

In multi-gas mode, you can also edit the helium (He%) fraction in addition to oxygen. When diving with helium, the combined value of oxygen and helium is always 100%. The oxygen fraction can be adjusted between 5% and 100%.

The default oxygen percentage is 21% (air) and the default oxygen partial pressure (ppO₂) is 1.4 bar.

The ppO₂ setting determines the MOD, which defines the safe depth limit for the selected gas. You can set ppO₂ to 1.0, 1.1, 1.2, 1.3, 1.4, 1.5, or 1.6 bar.

Gas settings are adjusted in the Edit gas view by selecting the desired mixture.

In the Edit gas menu you can also set your tank size. The default value is 12 liters / 80 cu ft. Make sure you set your correct tank size to ensure correct gas consumption calculations when diving with Suunto Tank POD.

From the Edit gas menu you can also pair your Suunto Tank POD. See How to install and link a Suunto Tank POD for information about the wireless tank pressure pairing.

Diving with multiple gases

When diving with Multigas mode, Suunto Nautic allows gas changes between the enabled gases in the Gases menu. You can have maximum five gases in the gas list, enabled or disabled.

When ascending, you are always notified to change gas when a better gas is available.

For example, you may have the following gases when diving to 40 m (131.2 ft):

• Nitrox 26% (1.4 ppO₂) (for bottom)
• Nitrox 50% (1.6 ppO₂) (decompression gas)
• Nitrox 99% (1.6 ppO₂) (decompression gas)

While ascending, you are notified to change gas at 22 m (72 ft) and 6 m (20 ft) according to the maximum operating depth (MOD) of the gas. Gas switch notification will be in the switch window and pressing any button will open a gas list with the recommended gas first. Confirm the new gas by pressing the middle button. If you don’t want to perform the suggested gas switch, you can dismiss the gas switch recommendation. This will ignore the suggested gas until the next possible MOD of an enabled gas.

Once the dive has ended, the gas with the lowest O₂ value will be your active gas for the next dive.

Wireless tank pressure support

Suunto Nautic can be used together with Suunto Tank POD for wireless transmission of tank pressure and gas consumption to the dive computer. Suunto Nautic is only compatible with Suunto Tank POD transmitters. Suunto Tank POD transmits data using 123 kHz band. The communication from the Tank POD to the dive computer is one-way, meaning the dive computer does not send anything to the Tank POD.

Enabled features when Suunto Nautic is paired to Suunto Tank POD:

• Tank pressure from up to 5 gas cylinders

• Actual gas consumption for the active gas (L/min or cu ft/min)

• Remaining gas time for the active gas

• Configurable tank pressure alarms

• Tank switch alarm when diving sidemount

• Logging of start, end and the used pressure

• Logging of average gas consumption for every gas with Tank POD

• Units in bar or PSI

How to install and link a Suunto Tank POD

To install and link a Suunto Tank POD:

1. Install the Tank POD as described in the Tank POD quick guide or in the Tank POD user guide.

   NOTE:

   To ensure the most accurate tank pressure readings, Suunto recommends that you install Suunto Tank POD so it is on the same side as you wear your Suunto Nautic.

2. In the Gases menu, select the gas you want your Tank POD to link with.

3. Go to the Edit gas view and scroll to the Tank POD setting.

   

4. If you are diving with one tank, add your Tank POD to the 'Tank POD 1' slot and continue with step 5. If you are diving sidemount and you need to link a second Tank POD to the same gas, follow the same procedure for the 'Tank POD 2' slot.

   

5. Make sure the Tank POD has been activated and that it is within range. Select your Tank POD serial number from the list.

   

   

   

If you have linked the same Tank POD to several gases, remember to check before your dive that you have the right active gas and that you have your Tank POD linked. In the dive main views, only one tank pressure is shown and corresponds to the active gas.

Repeat the procedure above for additional Tank PODs and select different gases for each POD.

To unlink and remove your Tank POD from a specific gas:

1. Select the gas you want to remove the Tank POD from in the Gases menu.

2. De-select the Tank POD you want to remove (check the serial number).

3. Your Tank POD is removed from the selected gas list.

You can also unlink the Tank POD from the Tank POD menu.

Tank pressure

Once your Suunto Nautic is linked to a Suunto Tank POD, you can follow the tank pressure in the switch window.

Gas consumption

You can follow your actual gas pressure during your dive from the switch window on the device screen. You can also see the average gas consumption from the dive in the dive summary in the device and in Suunto app.

The Gas consumption data on the screen refers to your real-time consumption rate of gas during a dive at the depth you are at. To calculate your personal breathing rate, Suunto Nautic uses respiratory minute volume (RMV) which is the volume of gas your lungs experience per minute, measured in L/min or cu ft/min. For accurate gas consumption, you need to define the correct tank size for the gas in the Edit gas menu. See Edit gas. The default tank size is always 12 L (80 cu ft) .

The RMV formula used in Suunto Nautic to calculate the gas consumption during the dive is the following:

The calculation is based on actual depth and the average used gas volume (in atmospheric pressure) calculated within in a varying 50 – 170-second window.

To calculate gas volume, Suunto Nautic uses the following formula:

You can see your average gas consumption after the dive in the dive summary. The value shows the average gas consumption value, calculated from all the gas consumption values during the dive.

Gas time

The Gas time value in the switch window indicates the maximum time (in minutes) you can stay at the current depth and ascend to the surface (at an ascent rate of 10 m/min) with and end pressure of 35 bar (508 psi). The time is based on the tank pressure value, tank size and your current breathing rate and depth.

Gas time is calculated using the following formula:

Sidemount

When two Tank PODs are linked to the same gas, the tank pressures are pooled and calculated as one large tank. Only gas consumption and gas time value is shown, using the same formulas as single-tank calculations. Both sidemount tanks are assumed to be of equal volume.

Dive alarms

Suunto Nautic has color-coded mandatory warnings. They are shown prominently on the display with an audible and vibration alarm unless the audio or vibration is muted. Warnings are always red and they are critical events that always require immediate action. You can dismiss the audio and vibration but the warning will stay red until the situation has been resolved.

With Suunto Nautic, you can also define your own alarms and set the preferred audio, vibration and appearance.

Mute all audio and vibration

You can mute the audio and vibration alarms if you scroll down in the Alarms menu and select Mute all audio or Mute all vibration. Alarms and notifications will still appear on the screen visually, even if you mute the audio or vibration.

Mandatory dive alarms

The following table shows all the mandatory warnings you may see during a dive. You can find the reason for the alarm and the solution of the issue in the table.

If multiple alarms occur simultaneously, the error with the highest priority will be displayed. Acknowledge the first alarm by pressing any button and the next one will appear.

Alarm	Explanation	How to resolve the alarm?
	Ascent speed exceeds safe speed of 10 m (33 ft) per minute for five seconds or more.	Stay within the green ascent rate indicators. Monitor for symptoms of DCS. Use extra conservatism for future dives.
	Decompression ceiling broken by more than 0.6 m (2 ft) on a decompression dive.	Descend deeper than the displayed ceiling value.
	Partial pressure of oxygen exceeds the maximum level (>1.6).	Immediately ascend or change to a gas with lower oxygen percentage.
	Partial pressure of oxygen exceeds the set level for the gas.	Immediately ascend or change to a gas with lower oxygen percentage.
	Central Nervous System (CNS) Oxygen Toxicity level at 80% or 100% limit.	Switch to a gas with a lower ppO2 or ascend shallower (within decompression ceiling).
	80% or 100% of recommended daily limit for OTU reached.	Switch to a gas with a lower ppO2 or ascend shallower (within decompression ceiling).
	Tank pressure is below 50 bar (725 psi).	Change gas to a higher tank pressure or ascend to safety stop depth and terminate dive.
	Not inside the safety stop window.	Stay within the safety stop window 3 m – 6 m.
	NDL is less than 5 minutes.	Ascend shallower to avoid mandatory decompression stops.
	The decompression ceiling is broken for more than 3 min and your decompression stop is missed.	Descend to the ceiling depth indicated in the switch window.

User configurable dive alarms

In addition to the mandatory alarms, there are additional user configurable tank pressure, depth, dive time, NDL, gas time and sidemount tank switch alarms. For each alarm, you can customize the audio tone to short or long or you can have all tones off. In addition to the audio option, you can also choose to have a vibration alert or if you prefer to have all tones silent, you can have only vibration on.

In addition to the audible and vibration options, you can choose between two different appearance options: Notify (cyan) or Caution (yellow). You can define a maximum of five alarms for each configurable alarm and once an alarm appears, you can clear it by pressing any button.

Tank pressure

You can set the tank pressure alarm to any value between 51–360 bar (725–5221 psi). A mandatory 50 bar (725 psi) alarm is present and it cannot be modified. Tank pressure alarms are useful to notify you when reaching your turn pressure.

Depth

You can define a depth alarm between 3.0 m and 199.0 m. Depth alarms are convenient to have especially when freediving to notify you of different phases of the freedive. You can also set a depth alarm to notify you when reaching your personal depth limit during diving.

Dive time

Dive time alarms can be defined in minutes and seconds to a maximum of 99 min.

NDL

No decompression limit (NDL) alarms can be defined to alert you of a certain NDL or when you are low on NDL time.

Sidemount

If you have 2 Tank PODs paired to the same gas, you can define a pressure difference so that the device alerts you when to switch tanks. You can set the pressure difference threshold between 5 and 70 bar (73-1015 psi). Once the pressure difference reaches the set limit, you get an alert in the switch window.

Algorithm settings

Suunto's decompression model development originates from the 1980s when Suunto implemented Bühlmann's model based on M-values in Suunto SME. Since then, research and development has been ongoing with the help of both external and internal experts.

Bühlmann 16 GF algorithm

The Bühlmann decompression algorithm was developed by Swiss physician Dr. Albert A. Bühlmann, who researched into decompression theory starting from 1959. The Bühlmann decompression algorithm is a theoretical mathematical model describing the way in which inert gases enter and leave the human body as the ambient pressure changes. Several versions of the Bühlmann algorithm have been developed over the years and adopted by many dive computer manufacturers. Suunto Nautic is using Suunto’s Bühlmann 16 GF dive algorithm that is based on the Bühlmann ZHL-16C model that we have implemented our own code for. The algorithm can be modified by using gradient factors to set the level of conservatism.

Gradient Factors

Gradient Factor (GF) is a parameter to create various levels of conservatism. GFs are divided into two separate parameters, Gradient Factor Low and Gradient Factor High.

By using GF with the Bühlmann algorithm, you can set your safety margin for the dive by adding conservatism to control when different tissue compartments reach their acceptable M‑value. A Gradient Factor is defined as percentage of the M-value Gradient and defined from 0% to 100%.

A commonly used combination is GF Low 30% and GF High 70%. (Also written as GF 30/70.) This setting means that the first stop would take place once the leading tissue reaches 30% of its M-value. The lower the first number is, the less supersaturation is allowed. As a result, the first stop is required when you are deeper. A Gradient Factor of 0% represents the ambient pressure line and a Gradient Factor of 100% represents the M-value line.

In the following illustration, GF Low is set to 30% and the leading tissue compartments react to the 30% limit of the M-value. At this depth the first decompression stop takes place.

When the ascent continues, the GF moves from 30% to 70%. GF 70 indicates the amount of supersaturation allowed when you get to the surface. The lower the GF High value is, the longer shallow stop is needed to off-gas before surfacing. In the following illustration, GF High is set to 70% and the leading tissue compartments react to the 70% limit of M-value.

At this point you can come back to the surface and finish your dive.

GF Low % effect on dive profile is illustrated in the following picture. It shows how GF Low % determines the depth where the ascent starts slowing down and the depth of the first decompression stops. The illustration shows how the different GF Low % values change the depth of the first stop. The higher the GF Low % value is, the shallower the first stop occurs.

GF High % effect on the dive profile is illustrated in the following picture. It shows how GF High % determines the decompression time spent in the shallow phase of the dive. The higher the GF High % value is, the shorter the total dive time is, and the less time the diver spends in shallow water. If GF High % is set to a lower value, the diver spends more time in shallow water and the total dive time gets longer.

You can adjust the gradient factors. The default conservatism setting in the Suunto Nautic dive computer is set to medium (40/85). You can adjust the setting to more aggressive or more conservative than the default value. Select from the preset levels or set your own custom level.

The preset values are the following:

• Low: 45/95

• Medium: 40/85 (default)

• High: 35/75

For recreational dives, a high conservatism setting (35/75) gives you more buffer to avoid decompression requirements. Low conservatism setting (45/95) gives you more NDL time but also a lower buffer so it is a more aggressive setting.

There are several risk factors that can affect your susceptibility to DCS, such as your personal health and behavior. Such risk factors vary between divers, as well as from one day to another.

The personal risk factors which tend to increase the possibility of DCS include the following:

• exposure to low temperature – water temperature less than 20 °C (68 °F)
• below average physical fitness level
• age, particularly over the age of 50
• fatigue (from over exercising, lack of sleep, exhausting travel)
• dehydration (affects circulation and may slows down off-gassing)
• stress
• tight fitting equipment (may slows down off-gassing)
• obesity (BMI that is considered obese)
• patent foramen ovale (PFO)
• exercise before or after dive
• strenuous activity during a dive (increases bloodflow and brings additional gas to tissues)

Deco profile

Deco profile can be selected in Dive options > Algorithm > Deco profile.

Continuous decompression profile

Traditionally, since Haldane’s 1908 tables, decompression stops have always been deployed in fixed steps such as 15 m, 12 m, 9 m, 6 m and 3 m. This practical method was introduced before the advent of dive computers. However, when ascending, a diver actually decompresses in a series of more gradual ministeps, effectively creating a smooth decompression curve. The advent of microprocessors has allowed Suunto to more accurately model the actual decompression behavior. During any ascent involving decompression stops, Suunto dive computers calculate the point at which the control compartment crosses the ambient pressure line (that is the point at which the tissue’s pressure is greater than the ambient pressure), and off-gassing starts. This is referred to as the decompression floor. Above this floor depth and below the ceiling depth is the decompression window. The range of the decompression window is dependent on the dive profile.

The optimal decompression occurs in the decompression window, which is displayed by both upward and downward arrows next to the depth value. If the ceiling depth is violated, a downward pointing arrow and an audible alarm will prompt the diver to descend back to the decompression window.

Off-gassing in the leading fast tissues will be slow at or near the floor because the outward gradient is small. Slower tissues may be still on-gassing and given enough time, the decompression obligation may increase, in which case the ceiling may move down and the floor may move up. The decompression floor represents the point at which the algorithm is seeking to maximize bubble compression, while the decompression ceiling is maximizing off-gassing.

The added advantage of having a decompression ceiling and floor is that it recognizes that in rough water, it might be difficult to maintain the exact depth to optimize decompression. By maintaining a depth below the ceiling but above the floor, the diver is still decompressing, although slower than optimal, and provides an additional buffer to minimize the risk that waves will lift the diver above the ceiling. Also, the continuous decompression curve used by Suunto provides a much smoother and a more natural decompression profile than the traditional “step” decompression.

Stepped decompression profile

In this decompression profile, the ascent has been divided into traditional 3 m (10 ft) steps or stages.

In this model the diver decompresses at traditional fixed depths. The ceiling value in the switch window will show the depth of the next step and once the diver reaches the decompression window, a timer starts showing the needed length of the decompression stop.

See Example - Multigas mode for an example decompression dive.

Safety stop time

A safety stop is always recommended for every dive over 10 meters (33 ft). You can adjust the safety stop settings as follows:

3 min: The safety stop is always a 3-minute stop, even after the last decompression stop. The safety stop time is not included in TTS (time to surface).

4 min: The safety stop is always a 4-minute stop, even after the last decompression stop. The safety stop time is not included in TTS (time to surface).

5 min: The safety stop is always a 5-minute stop, even after the last decompression stop. The safety stop time is not included in TTS (time to surface).

Always OFF: No safety stop is shown during the dive.

Adjusted: A 3-minute safety stop is added after decompression, but the duration of the stop is adjusted based on the dive profile. This means that it can be shorter if the time is spent in the shallow. The predicted time is included in TTS (time to surface).

Last deco stop depth

You can adjust the last stop depth for decompression dives under Dive options » Algorithm » Last deco stop. There are two options: 3 m and 6 m (9.8 ft and 19.6 ft).

By default, the last stop depth is 3 m (9.8 ft).

Altitude setting

When diving at altitudes greater than 300 m (980 ft), the altitude setting must be manually selected in order for the computer to calculate the correct decompression status.

You can find the setting under Dive options » Algorithm » Altitude and select from three ranges:

• 0 – 300 m (0 – 980 ft) (default)
• 300 – 1500 m (980 – 4900 ft)
• 1500 – 3000 m (4900 – 9800 ft)

As a result, the allowed no decompression stop limits are considerably reduced.

The atmospheric pressure is lower at high altitudes than at sea level. After traveling to a higher altitude, you will have additional nitrogen in your body, compared to the equilibrium situation at the original altitude. This 'additional' nitrogen is released gradually over time and equilibrium is restored. Suunto recommends that you acclimatize to a new altitude by waiting at least three hours before making a dive.

Before high-altitude diving, you need to adjust the altitude setting of your dive computer so that the calculations take into account the high altitude. The maximum partial pressures of nitrogen allowed by the mathematical model of the dive computer are reduced according to the lower ambient pressure.

Algorithm off

You can use your Suunto Nautic device as a bottom timer only by toggling the algorithm off in Dive settings > Algorithm. When algorithm is set to off, the device does not use any decompression algorithm, thus it does not include decompression information or calculations during the dive.

Diving with Suunto Nautic

Safety stops

A three (3) minute Safety stop is always recommended for every dive over 10 meters (33 ft). When a safety stop is required, the minimum ceiling value (3 m) appears in the switch window.

The time for a safety stop is calculated when you are between 2.4 and 6 m (7.9 and 20 ft).

This is presented with up and down arrows on the left side of the stop depth value. Safety stop time is shown in minutes and seconds. The preferred safety stop time can be set in the Algorithm menu under Safety stop.

Ascending shallower than 2.4 m will trigger an alarm in the window indicator. Please descend below the 3m ceiling value.

If the depth goes below 6 m (20 ft), the safety stop timer will stop and resume counting once you are again inside the safety stop window. Once the timer shows zero, the stop is done and you can ascend to the surface.

Safety stops

A three (3) minute Safety stop is always recommended for every dive over 10 meters (33 ft). When a safety stop is required, the minimum ceiling value (3 m) appears in the switch window.

The time for a safety stop is calculated when you are between 2.4 and 6 m (7.9 and 20 ft).

This is presented with up and down arrows on the left side of the stop depth value. Safety stop time is shown in minutes and seconds. The preferred safety stop time can be set in the Algorithm menu under Safety stop.

Ascending shallower than 2.4 m will trigger an alarm in the window indicator. Please descend below the 3m ceiling value.

If the depth goes below 6 m (20 ft), the safety stop timer will stop and resume counting once you are again inside the safety stop window. Once the timer shows zero, the stop is done and you can ascend to the surface.

Decompression dives

When you exceed the no-decompression limit, Suunto Nautic provides the decompression information required for ascending depending on the decompression profile.

Once the No deco time is at 0 min, the display area will change to show the Deco time (also referred to Time to surface): optimum ascent time in minutes to surface with given gases.

The ceiling value will be displayed in the stop area either alone or together with the recommended stop depth, depending on your set decompression profile. The ceiling value indicates the first decompression stop depth.

You can set the last stop depth to 3.0 m or 6.0 m (the default depth is 3.0 m) in the Algorithm settings. See Last deco stop depth.

On a decompression dive, different stop types can be present:

• Decompression stop: A compulsory stop if diving with a Stepped decompression profile (see Deco profile). Decompression stops occur at fixed 3 m (10 ft) intervals.
• Safety stop: If safety stop time has been set, you will have an extra safety stop after the last decompression stop. Safety stop is always non mandatory for decompression dives.

There is a decompression window at 3 m (9.8 ft) between the decompression floor and decompression ceiling. The closer to the ceiling you stay, the more optimal the decompression time is.

When you ascend close to the ceiling depth and enter the decompression window area, two arrows appear next to the depth number.

If diving with a Stepped deco profile, a timer will start the countdown when entering the decompression window and the ceiling is the same for a specific time and then moves upwards 3 m (9.8 ft) at a time.

Inside the decompression window (Stepped profile):

In the Continuous ascent mode, the ceiling is constantly decreasing while you are near the ceiling depth, providing continuous decompression with optimum ascent time.

Inside the decompression window (Continuous profile):

If you ascend above the ceiling depth, there is still a safe margin area, equalling to the ceiling depth minus 0.6 meters (2 ft). In this safe margin area, decompression calculation still continues, but you are advised to go down below the ceiling depth. This is indicated with a downward pointing yellow arrow next to the depth value.

The following is displayed using the Stepped decompression profile:

The following is displayed using the Continuous decompression profile:

If you go above the safe margin area, the decompression calculation is paused until you go back down below this limit. An audible alarm and a downward pointing red arrow in front of the ceiling depth value indicate unsafe decompression. If you ignore the alarm and stay above the safe margin for three minutes, the stop is considered missed and an algorithm violation notification will appear.

Suunto Nautic does not lock after you confirm the algorithm deviation trigger alert. Suunto Nautic continues showing the original decompression plan even if the decompression stop is violated. A red warning will appear in the window and it will stay in the diving window until the required decompression stops are cleared or after 48 hours.

Algorithm violation can also occur in the following situations:

• End of battery

• Software crash

• Exceeding the maximum depth limit of device (60 m).

In all of the cases, the algorithm deviation icon will appear in the dive window, but the algorithm will function as normal. If an algorithm deviation has occurred during the dive, you will also see a header in the dive log and in Suunto app.

Compass use during diving

The Suunto Nautic device has a gyro-assisted compass that allows you to orient yourself in relation to magnetic north. You can customize the switch window to show the compass while diving.

When the compass is visible in the switch window, you can set the bearing by short pressing the back button. Once the bearing is set, a notification is displayed and the bearing pointer appears on the compass arch to indicate the set heading. When the bearing is set, the bearing pointer is locked on the compass arch to indicate the set heading. The orange slot located on the opposite side of the pointer is to indicate the reciprocal direction (180 degrees).

The bearing can be cleared at any time by long pressing the back button again.

The compass calibrates itself when in use, but if a recalibration is needed, a prompt pops up in the switch window. To calibrate the compass, turn and tilt the device in a figure-8.

Stopwatch use during diving

The Suunto Nautic has a timer that can be used for timing specific actions on the surface and during diving. The timer can be configured to be present in the switch window. See Switch window customization.

Start and stop the stopwatch by short pressing the back button. You can resume by short pressing the back button again. Reset by long pressing the back button.

Example - Single gas mode

The following example shows a no-decompression dive in Single gas mode with Air and a Suunto Tank POD.

1. Surface screen:

   We recommend starting your dive from the surface view to verify all key settings before descending. Check that your gas and algorithm settings are correct, your device has a GPS signal, and you have sufficient battery and tank pressure (if linked to a Suunto Tank POD). Make sure you are diving with the correct gas mixture and that you understand the maximum operating depth (MOD) of the active gas.

   If the Suunto Tank POD battery is low, or if the tank pressure is below the safe limit, a warning will be shown on the screen.

   

2. Once descending over 10 m, a safety stop indication will appear in the switch window, indicating a safety stop ceiling of 3 m. No deco time shows > 99, meaning the maximum time you can spend at this depth is greater than 99 min.

   

   Once you continue the descent, the No deco time will show a smaller value. No deco time is always in minutes.

3. If your No deco time reaches 5 min, a yellow caution alarm will be triggered. When ascending and the No deco value is increased, the alarm will be resolved. You can also mute the alarm with any button press. Continuing to stay at deeper depths despite the No deco alarm can cause decompression obligation. Do not dive decompression dives unless you’ve sufficient training.

   

4. You can set your own tank pressure alarms to help you keep track of critical limits, like turn pressure. If set, Suunto Nautic alerts you when reaching 100 bar (1450 psi).

   

5. When you are between 2.4 and 6 m (7.9 and 20 ft), a safety stop timer will appear and count down until the suggested stop. Once the stop is performed, a Stop done notification will appear.

   

Example - Multigas mode

The following example shows a decompression dive to 40 m in Multigas mode and with the following gases: NX28 (main gas), NX99 decompression gas.

1. Pre dive screen – showing the active gas (NX28), set ppO2 and MOD.

   

2. NDL reaches 0 and decompression is needed. The TTS value is now also including deco stop and safety stop. The first decompression stop depth (ceiling) and stop time is indicated in the stop area.

   

3. The ceiling value is 9 m so you can ascend to this depth within the ascent speed limits. Once arriving close to the ceiling depth and entering the decompression window area, two arrows appear next to the depth number and a timer appears in the Deco field counting down the required decompression stop.

   

4. Gas change at 6 m. The decompression time is always calculated with the assumption that you use all the gases found in the Gas list. Once ascending to 6 m, a gas change to NX99 will be suggested. Once switch is made, the information of the current gas appears. If you decide to dismiss the gas change, the decompression information will not be accurate..

   

5. Arriving at the last stop. Once the decompression time is cleared, the deco badge disappears and the stop turns into a safety stop. In this example, the safety stop is set to Adjusted, so the countdown starts at 1'30 due to longer time at 6 m.

   

6. Once all stops are done, the Stop done info will appear in the switch window and it is then safe to ascend to surface.

Dive planner

The dive planner helps you quickly plan your next dive. It displays the available no-decompression time based on your selected depth, algorithm settings, and current surface interval. You can also use the planner to plan decompression dives, allowing you to review required stops and total ascent time before diving.

How to plan a no-decompression dive

Before you start planning your next dive in the Planner menu, set the following:

• the active gas planned for the dive

• algorithm settings: conservatism and altitude settings

The planner displays the active gas defined for the dive mode. You can modify the gas settings under the Gases menu (see Gases).

For planning a no-decompression dive, choose No deco.

The surface interval is calculated automatically from the end of the previous dive. Use the upper and lower buttons to adjust the value in 10-minute increments to reflect the planned surface interval. The maximum value is 48 hours.

Use the up and down buttons to adjust the planned depth. You can see the NDL time for the specific depth at the bottom of the screen, together with the MOD for your gas.

Press the Ok button for your summary or back button to modify your selections. The summary also displays the next 5 m depth steps, both deeper and shallower, along with their corresponding no-decompression limits (NDL) to make dive planning easier.

How to plan a decompression dive

When planning a decompression dive, select Deco as the dive type and follow the same steps as for a no-decompression dive when setting the surface interval and depth. In addition, you must define your planned bottom time. While adjusting the bottom time, the planner displays the corresponding no-decompression limit (NDL) and total time to surface (TTS) for that depth.

The decompression plan shows a detailed breakdown of your planned dive, including:

• Type of Step: Descent, bottom, ascent, stop, or surface
• Depth
• Time to spend at each stop
• Accumulated run time at the end of each step
• Suggested gas for each segment
• Gas switch recommendation, if required
• Dive profile graph showing the depth curve and stop positions
• Total run time: Total dive time including all decompression stops
• Total decompression time required

• NDL value at the maximum depth

  

Dive history

The Dive history you with information regarding your previous dive and interesting statistics of your dives done with Suunto Nautic.

Dives are listed by date and time, and each entry listing shows the max. depth and dive time of the log.

Selecting a dive, by pressing the OK button, provides you with a more detailed version. Dive log details and profile can be browsed by scrolling through the logs and selecting a log with the OK button.

Each dive log contains data samples with fixed 10-second intervals. Freedive sample rate is 1 second.

The dive log contains the following data:

• Dive time
• Start and stop times
• Average and max depth
• An algorithm deviation alert if present during the dive
• Maximum and average temperature
• Gas list of active and enabled gases
• Start and end pressure if linked with Suunto Tank POD
• Avg. gas consumption for each gas if linked with Suunto Tank POD
• Current Gradient Factors
• CNS and OTU values
• Average heart rate if enabled
• Surface time
• Tissue graph from previous dive
• Depth graph

When the logbook memory gets full, the oldest dives are deleted to make space for new ones.

Surface and no-fly time

After a dive, Suunto Nautic displays surface time since the previous dive.

A recommended no-fly time is visible in the Dive history widget. No-fly time is the minimum surface time after a dive which is recommended to wait before flying or traveling to higher altitude. It is always at least 12 hours and equals desaturation time when it is more than 12 hours. For desaturation times shorter than 75 minutes, no-fly time is not displayed.

If an algorithm deviation has occurred during the dive, the no-fly time is always 48 hours.

Feeling

After each dive, you can record how you felt by answering the 'How was it?' question.

There are five degrees of feeling to choose from:

• Poor
• Average
• Good
• Very good
• Excellent

If you want to use this feature, you can enable it under Dive settings > Additional settings.

Widgets

Maps

You can use your device to navigate in various ways. You can, for example, use it to orient yourself in relation to magnetic north or navigate to a point of interest (POI).

To use the map feature:

1. Scroll up to the Map widget and select it.

2. The map display shows your current location and the surroundings, while the compass shows your current heading.

Map functions

• Press the up and down button to zoom in and out
• Press the OK button to open the menu
• Press the back button to go back

Map style

In the map options, your Suunto Nautic has several map styles to choose from: Light, Dark, High contrast, Winter. Select the map style that suits your current activity the best.

Panning the map

Select the Pan the map option in the map options to move around the map area. Use the up and down buttons to pan the map. Press the back button to exit the pan mode.

Offline maps

With Suunto Nautic, you can have offline maps downloaded on your device.

Before you can use offline maps in your device, you need to set up a wireless network connection in Suunto app and download the selected map area to your device. You will get a notification on your device when the map download is complete.

A more detailed instruction on how to setup a wireless network and download offline maps in Suunto app is available here.

Points of interest

A point of interest, or POI, is a special location, such as camping spot or a dock, you can save and navigate to later. You can create POIs in Suunto app from a map and do not have to be at the POI location. Creating a POI in your device is done by saving your current location.

Each POI is defined by:

• POI name
• POI type
• Date and time created
• Latitude
• Longitude
• Elevation

Adding POIs

You can add a POI to your device either with Suunto app or by saving your current location in the dive computer.

1. Go to Navigation options and Save location as a POI.
2. When the device displays your latitude and longitude, select Save and select the POI type.
3. By default the POI name is the same as the POI type (with a running number after it). You can edit the name later in Suunto app.

POI types

The following POI types are available in Suunto Nautic:

	Begin
	End
	Car
	Parking
	Home
	Building
	Hotel
	Hostel
	Lodging
	Bedding
	Camp
	Camping site
	Camp fire
	Aid station
	Emergency
	Waterpoint
	Information
	Restaurant
	Food
	Cafe
	Cave
	Mountain
	Peak
	Rock
	Cliff
	Avalanche
	Valley
	Hill
	Road
	Trail
	River
	Water
	Waterfall
	Coast
	Lake
	Kelp forest
	Marine reserve
	Coral reef
	Big fish
	Marine mammal
	Wreck
	Fishing spot
	Beach
	Forest
	Meadow
	Coast
	Stand
	Shot
	Rub
	Scrape
	Big game
	Small game
	Bird
	Prints
	Crossroads
	Danger
	Geocache
	Sight
	Trailcam

Weather

The weather widget provides you with information of the current weather. It shows the current temperature, wind speed and direction, wind gusts, humidity, precipitation, sunset and sunrise times, moonphase and forecast data.

Tide

The tide widget provides information about the current tide state. It shows the tide height (m), upcoming high and low tides with height and time, wave height, moon phase, and a 24-hour forecast.

Data is based on your location from the Suunto app. Make sure to sync your device regularly with the app for the most accurate tide data. The widget also shows the location used for the prediction.

Care and support

Handling guidelines

Handle the unit with care – do not knock or drop it.

Under normal circumstances, the device does not require servicing. On a regular basis, rinse it with fresh water, mild soap, and carefully clean the housing with a moist, soft cloth or chamois.

Use only original Suunto accessories - damage caused by non-original accessories is not covered by warranty.

Handling guidelines

Handle the unit with care – do not knock or drop it.

Under normal circumstances, the device does not require servicing. On a regular basis, rinse it with fresh water, mild soap, and carefully clean the housing with a moist, soft cloth or chamois.

Use only original Suunto accessories - damage caused by non-original accessories is not covered by warranty.

Battery

The duration on a single charge depends on how you use your device and in what conditions. Low temperatures, for example, reduce the duration of a single charge. In general, the capacity of rechargeable batteries decreases over time.

When the battery charge level is less than 20% and later 5%, your device displays a low battery icon. If the charge level gets very low, your device goes into a low power mode and displays a charge icon.

Use the supplied USB cable to charge your device. Once the battery level is high enough, the device wakes up from lower power mode.

Disposal

Please dispose of the device in accordance with local regulations for electronic waste. Do not throw it in the garbage. If you wish, you may return the device to your nearest Suunto dealer.