Garmin DESCENT MK3 Series User Manual

Switching Between CC and OC Diving for a Bailout Procedure
During a closed-circuit rebreather (CCR) dive, you can switch between closed-circuit (CC) and open-circuit (OC)
diving while you perform a bailout procedure.
1 Start a CCR dive.
2 Press START.
3 Select Switch to OC.
The dividing lines on the data screens turn red, and the device switches the active breathing gas to your OC
decompression gas.
NOTE: If you have not set up an OC decompression gas, the device switches to your diluent gas.
4 If necessary, press START, and select Gas to manually switch to a backup gas.
5 Press START, and select Switch to CC to switch back to CC diving.
Performing a Safety Stop
You should perform a safety stop during every dive to help reduce the risk of decompression sickness.
1 After a dive of at least 11 m (35 ft.), ascend to 5 m (15 ft.).
Safety stop information appears on the data screens.
Your depth relative to the surface.
As you ascend, your position moves upward toward the safety stop depth.
The safety stop ceiling depth.
The safety stop timer.
When you are within 1 m (5 ft.) of the ceiling depth, the timer starts counting down.
2 Stay within 2 m (8 ft.) of the safety stop ceiling depth until the safety stop timer reaches zero.
NOTE: If you ascend more than 3 m (8 ft.) above the safety stop ceiling depth, the safety stop timer pauses,
and the device alerts you to descend below the ceiling depth. If you descend below 11 m (35 ft.), the safety
stop timer resets.
3 Continue ascending to the surface.
Diving 19

Garmin DESCENT MK3 Series Specifications

General

Display Resolution	280 x 280 pixels
Display Type	Sunlight-visible, transflective memory-in-pixel (MIP)
Lens Material	Sapphire crystal
QuickFit Watch Band Compatible	Yes (26 mm)
Memory/History	32 GB
Connectivity	Bluetooth, ANT+, Wi-Fi
GPS	Yes
Display Size	1.4" (35.56 mm) diameter
Case Material	Fiber-reinforced polymer with metal rear cover
Water Rating	Dive (100 meters)
Sensors	Gyroscope, Accelerometer, Thermometer
Diving Features	Dive log, dive planning
Smart Features	Music storage, Garmin Pay, Notifications, Connect IQ
Materials	Fiber-reinforced polymer
Dimensions	51 x 51 x 17.8 mm
Bezel Material	Stainless steel or DLC titanium