CT Sean
Contributor
yes, i will use tables
Even though that Garmin says it's fine to 5ATM, like most (pretty much all) watches with a 5ATM rating, I doubt it is intended for operating at pressure for long durations. It may very well be fine, but if it doens't survive, I'd be surprised if they honored the warranty
edit
Actually this is stated in the manual:
Garmin Vivoactive page 4:Swimming
NOTICE
The device is intended for surface swimming. Scuba diving with the device may damage the product and will void the warranty