3. Features
3.1. Activation and pre-checks
Unless the dive mode turned off, the dive mode activates automatically when you dive
deeper than 1.2 m (4 ft). However, you should switch to dive mode before diving to check
altitude and personal settings, battery condition and so on.
Each time your Suunto D6M enters dive mode, a series of automatic checks are performed.
All graphical display elements are turned ON, and the backlight and the beep are activated
after which the battery level is checked.
Before leaving on a dive trip, it is highly recommended that you switch to dive mode to make
sure everything is functioning properly. You should perform your manual checks before
entering the water.
3.1.1. Wireless transmitter pre-check
If the optional wireless tank pressure transmitter is used, check that:
1. The transmitter is properly installed and the tank valve is open.
2. The transmitter and Suunto D6M are paired.
3. The transmitter is sending data (wireless transmission icon blinks, tank pressure is
displayed).
4. There is no transmitter low battery warning.
5. There is enough air for your planned dive. Check the pressure reading against your back-
up pressure gauge.
3.1.2. Battery indicators
Temperature or internal oxidation can affect the battery voltage. If you store your Suunto D6M
for a long period or use it in cold temperatures, the low battery warning may appear even
though the battery has enough capacity.
In these cases, re-enter dive mode and check the battery power. If the battery is low, the Low
Battery warning comes on.
Replace
Battery
Battery
Low
12:00
1.12 TH
If the low battery icon appears in surface mode, or if the display looks faded, the battery may
be too low. Battery replacement is recommended.
NOTE: For safety reasons, the backlight and buzzer (sound) cannot be activated when
the low battery warning is displayed.
Suunto D6M
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