I use transmitter instead of gauge
Been there -- done that, I now dive with the smallest submersible pressure gauge I could find as a back up to my wireless transmitter.
I had an incident a few years back when diving the "Arabia" which is a shipwreck in the Fathom Five National Marine Park in Tobermory, Ontario.
My air integrated computer console quit on me about 50 - 60 feet down and would not restart. Lost the depth, time, and air pressure information all at once and had to abort the dive.
I was able to return to the surface without incident, but not knowing if I would get another breath of air out of the tank on the way up to the surface was an experience I care not to repeat.
I now use a DUI pressure gauge clipped off to my BC just behind one of my weight integrated pockets, so it's there if and when I need it, as well as the wireless transmitter.
I'm sure there are smaller sp gauges that would weigh less than half a kilo. It's good cheap insurance and not much of a weight penalty to endure for the peace of mind received.
Have a good trip to the Maldives. Looking forward to seeing more great pictures.
P.S. Maybe this is a scouting party for leading future escorted dive trips?