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How deep are you going? What gas mixtures are you using? Which Garmin are you using? If you're using a Mk3i or a G2 (or related) you are using a diving computer in a smart watch form factor. It is custom built for this... unlike the Apple Watch Ultra.

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I'm still using the older Garmin Descent Mk2 model, which is basically equivalent to the Mk3 for diving features. (I might upgrade to the Mk4 when it launches later this year.) It sure is handy to have a single smartwatch that can do everything.

We use a variety standard breathing gas mixes for the depth range based on limits imposed by density, narcosis, decompression time, and oxygen exposure.

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