I didn't know what the 200fsw meant, but I looked it up and it apparently means "feet of salt water". That is REALLY deep diving.

His other requirement was waterproof to 5-10 meters, or about 15-30 feet. The PLB will do fine at the surface, but I wouldn't want to regularly subject it to depths of 30 feet without additional protection.

I do think that the ARC MicroFix is best PLB out there right now - based on Doug's testing and comments.

My point was that a GOOD dive shop could point him in the right direction better than I.