Unfortunately, he can barely screw a hose onto a faucet, so assembling the rig was always a trial. I haven't seen the Nikonos on our last few dives. I went the other direction, with a series of splash-proof disposables. What we both needed, clearly, was a starter camera system that would be simple to use yet functional to reasonable depths and adequate for vacation snapshots. Now there are three.
Accessories give versatility.
Limited film choice. Manual film advance. These cameras all come with 27 exposures of ISO 400 print film and a built-in flash. The housing is heavy plastic with a glass lens port and a rubber O-ring. It is the most complex of the three, with about 10 moving parts, three ports and three controls that pierce the housing.