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Garmin Dive Computer and SubWave Network Air Integration Transmitter Compatibility

Descent™ dive computers such as the Descent™ Mk2i and Descent™ Mk3i watches, and the Descent™ X50i dive computer have the ability to pair to Descent™ transmitters which use SubWave™ underwater communication network technology to report air tank pressure and diver depth during a dive. Descent™ T2 transmitters use updated technology that allows you to send and receive preset messages underwater using your paired Descent Mk3i watch or Descent X50i dive computer.

You can use either a Descent™ T1 or Descent™ T2 transmitter with any dive computer with air integration, but some features may be limited by the combination of dive computer and transmitter that you have, and your dive computer or transmitter may need a software update before they can function together. Check the table below for device and software compatibility.

Expected Behavior for Dive Computer and Transmitter Combinations
	Descent™ T1 transmitter SW v2.66 or earlier	Descent™ T1 transmitter SW v3.10 or later	Descent™ T2 transmitter SW v2.24 or later
Descent™ Mk2i watch SW v20.40 or earlier	View tank pressure for up to 5 paired Descent T1 transmitters View diver depth	Will not work User will get popup that says it "failed to connect" Update software	Will not work User will get popup that says it "failed to connect" Update software
Descent™ Mk2i watch SW v26.10 or later	View tank pressure for up to 5 paired Descent T1 transmitters View diver depth	View tank pressure for up to 5 paired Descent T1 transmitters View diver depth View diver distance	View tank pressure for up to 8 paired Descent T2 transmitters View diver depth View public tank name View diver distance Receive messages
Descent™ Mk3i watches SW v16.25 or later	View tank pressure for up to 5 paired Descent T1 transmitters View diver depth	View tank pressure for up to 5 paired Descent T1 View diver depth View diver distance	View tank pressure for up to 8 paired Descent T2 transmitters View diver depth View public tank name View diver distance Send and receive messages
Descent™ X50i dive computer SW v1.05 or later	View tank pressure for up to 5 paired Descent T1 transmitters View diver depth	View tank pressure for up to 5 paired Descent T1 View diver depth View diver distance	View tank pressure for up to 8 paired Descent T2 transmitters View diver depth View public tank name View diver distance Send and receive messages

Key:

View tank pressure for yourself and connected divers.

View diver depth for connected divers.

Public Tank Name View the public transceiver names for yourself and connected divers.

View diver distance for connected divers.

Send Dive Messages Send pre-defined messages to divers with a Descent T2 transceiver.

Receive Dive Messages Receive in-dive messages from divers with a Descent Mk3i watch or Descent X50i and Descent T2 transceiver.

No Network Connection No dive network connection. You should update both of your devices to the latest software versions. See example error message below.

I Am Getting an Error When Pairing My Dive Transmitter With My Descent Mk2i Watch

If you are pairing a Descent Mk2i watch on software version 20.40 or earlier to a Descent T2 transmitter, you will get an error when trying to pair. You may also see an error message if your Descent Mk2i watch is on software version 20.40 or earlier and you are trying to pair a Descent T1 transmitter which has updated past software version 2.66. If you ignore the error, the transmitter may appear to function above the surface, but connection will be lost as you descend underwater. To resolve this, update the software on your Descent Mk2i watch to the latest version. See Installing the Latest Software On the Descent Mk2 Series for information about the latest software version and how to update your watch.

Example of the Error Message

If you receive the following error message when pairing either a Descent T1 or Descent T2 transmitter to your Descent Mk2i watch, or notice a No Network Connection message for the transmitter in the sensor menu on your watch, please update your watch's software.

How Do I Use the Diver to Diver Messaging?

SubWave underwater network diver to diver messaging is available for air integrated Descent dive computers that are paired with Descent T2 transceivers. Descent T1 transmitters are not compatible with messaging even if you have a compatible dive computer. Descent Mk3i dive watches and Descent X50i dive computers are able to send and receive messages. Descent Mk2i dive watches can receive messages, but are unable to send messages. See Setup and Use of the SubWave Diver to Diver Messaging for full instructions.

How Do I Use the Diver Distance Feature?

Approximate diver distance from you is available onall air integrated Descent dive computers with any Descent transmitter on up to date software. See Setup and Use of the SubWave Diver Distance for full instructions.