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Pairing the Transceiver with a Descent Watch

Before you use the transceiver for the first time, you must pair it with the a compatible Descent watch using 
ANT technology.
For more information about compatible watch models, go to the Descent T2 transceiver product page on 

garmin.com

.

Wake the transceiver from low power mode (

Waking the Transceiver from Low Power Mode, page 8

).

On your Descent watch, hold MENU, and select Dive Setup > Dive Network & Air Integration > Transmitters > 

Add New.
The watch starts searching and displays a list of nearby transceivers.

From the list of transceivers, select the transceiver ID you want to pair.

The transceiver ID is printed on the housing.

When the pairing process is complete, the transceiver begins sending data, and it is ready to use on a dive. The 
next time the transceiver and watch are turned on and within wireless range, they connect automatically when 
you start a dive.
If you are diving with a group, you can pair up to 8 Descent transceivers with the watch.

Transceiver Settings

You can customize the settings for paired transceivers prior to a dive.
On the paired Descent watch, hold MENU, select Dive Setup > Dive Network & Air Integration > Transmitters
and select a transceiver.
Status: Enables a connection to the transceiver, and shows the current connection status.
Placement: Sets the transceiver location as either your own tank or that of another diver.
Public Tank Name: Allows you to associate a name with your transceiver, which will be visible to your dive 

group.
NOTE: If you customize this name, another option appears in the list to clear the name.

Nickname: Allows you to associate a nickname with another user's transceiver, which will be visible on your dive 

data screens.
NOTE: If you customize this name, another option appears in the list to clear the name.

Identify: Plays a tone on the selected paired transceiver. This helps you to identify the transceiver without 

needing to look at the transceiver ID printed on the transceiver housing.

Working Pressure: Sets how much pressure the tank has when full. This value is used to determine the upper 

end of the pressure gauge, and to calculate respiratory minute volume (RMV) for tanks using psi units.

Reserve Pressure: Sets the threshold values for reserve pressure and critical pressure alerts to appear on the 

watch.

Volume: Allows you to enter the air volume of the tank. You can use the Reset Volume option if you move the 

transceiver to a different size tank.
NOTE: This value is required to calculate volumetric surface air consumption (SAC) and respiratory minute 
volume (RMV) (

Selecting the Gas Consumption Rate Metric, page 10

).

SAC/RMV/ATR: Enables the transceiver to be included in volumetric surface air consumption (SAC), respiratory 

minute volume (RMV), and air time remaining (ATR) estimates (

Including Transceivers in Gas Consumption 

Calculations, page 10

).

Set Transmit Power: Allows you to adjust the power setting if your transceiver is losing connection with the 

paired watch underwater.

About: Displays the transceiver ID, software version, and battery status.
Remove: Allows you to remove a paired transceiver.

Diving

9

Summary of Contents for DESCENT 12

Page 1: ...DESCENT T2 Owner sManual...

Page 2: ...com for current updates and supplemental information concerning the use of this product Garmin the Garmin logo and ANT are trademarks of Garmin Ltd or its subsidiaries registered in the USA and other...

Page 3: ...During a Dive 11 Updating the Transceiver Software Using Your Watch 11 Pairing the Transceiver with the Garmin Dive App 12 Device Information 12 Replacing the Descent T2 Transceiver Battery 12 Descent...

Page 4: ......

Page 5: ...iver communicates wirelessly with your compatible watch On the surface it uses ANT technology Underwater it uses the SubWave sonar network Your body drysuit and dive equipment can obstruct the signal...

Page 6: ...t the bottom you can use a high pressure hose to relocate the transceiver to have a clear line of sight over your shoulders If you lose the signal from your transceiver you should move your arm until...

Page 7: ...Installation and Setup 3...

Page 8: ...you should read the transceiver position tips and choose the port position that provides the best line of sight to the watch Transceiver Position Tips page 1 1 Detach the first stage regulator from th...

Page 9: ...an air pressurization failure Before you install the transceiver on a high pressure hose extension certified to the EN 250 2014 standard you should read the transceiver position tips and choose a posi...

Page 10: ...age regulator from the scuba cylinder and second stage regulator 4 Remove the port plug from the high pressure output port 5 Connect a high pressure hose extension to the high pressure output port 6 I...

Page 11: ...NOTICE To prevent damage to the transceiver and possible loss of function do not overtighten Do not grip the regulator or the transceiver to move carry or adjust the tank You must remove the air spool...

Page 12: ...ould also stay with others for an extended time after a dive because the potential onset of decompression illness DCI may be delayed or triggered by surface activities This device is not intended for...

Page 13: ...r transceiver which will be visible to your dive group NOTE If you customize this name another option appears in the list to clear the name Nickname Allows you to associate a nickname with another use...

Page 14: ...piratory minute volume RMV only if the air volume of the tank is entered in the watch Transceiver Settings page 9 The watch can estimate pressure based surface air consumption PSAC with or without the...

Page 15: ...ct an option to sync your watch Sync your watch with the Garmin Dive app Connect the watch to your computer using the USB cable and sync with the Garmin Express application The Garmin Dive app and Gar...

Page 16: ...evice To replace the battery you need a coin or flat screwdriver a new 3 V CR123A lithium battery and waterproof silicone grease You may also need a replacement battery cap accessory The transceiver i...

Page 17: ...e electrical contacts Cleaning the Transceiver 1 After each dive rinse the transceiver with fresh water to remove salt and debris 2 If necessary clean the transceiver with a soft cloth Replacement Par...

Page 18: ...iew public tank name Descent Mk3i View tank pressure View diver depth View tank pressure View diver depth View public tank name View tank pressure View diver depth View public tank name View tank pres...

Page 19: ...nsmitter 1 failed to connect Your paired watch cannot connect to the transceiver You should update both devices to the latest software version 1 is replaced with the transceiver name The paired watch...

Page 20: ...When you return to the surface after a dive depressurize your regulator The installed transceiver enters low power mode after two minutes have elapsed My transceiver makes an audible noise while divi...

Page 21: ......

Page 22: ...support garmin com GUID 55C588E7 3BD7 436C B442 84E4388D43E2 v1 November 2023...

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