[kali_00]

Notably, there was no attempt to operate the watch at such depths. Pressing a side button would be an interesting test, for instance. Many "water resistant" watches, rated to a certain depth are only rated so, given the not inconsiderable caveat of not being able to operated - just looked at. The higher end, more expensive models claiming full waterproof ability don't typically have such functional restriction.

[protimewaster]

It seems like actually pressing a watch button at that depth would be quite a feat of precision engineering itself. Are ROV arms typically that precise that it would be possible to see well enough and finely enough control the arm to press the button?

[curiousObject]

Not sure if the buttons function, but the watch is displaying time in the photos, for 50 minutes of the descent at least.