Several of those guys have dive watches on!
I commented earlier re the watches and no one picked up the dive watches.
Our male clan including BILs, sons, grandsons and nephews basically ended up with the Casio Pathfinder Watches because of their reliability, being water proof and basically in destructible. We swim and wade to fly fish with them, but we don’t dive to deep depths .
They are impervious to salt water and whatever water. The temp doesn’t work on outside temps unless you take it off. However, it does a good job of measuring your wrist temp and can warn you if your body temps are getting to cold or hot.
So the four guys wearing dive watches are possible UDT or maybe seal team guys.
I recently met a former Marine Diver, who served in Nam. He checked out bridges and wharves/docs to see if they had been booby trapped by the NV’s.
Good eyes.