While I have worked for a company in Hawaii with a true 6-pax dive boat, and contend that they are in fact "inspected", the application may have been neccessary for the boat I'm speaking of because it is actually certified for 12 divers, just limited to 6 by the owners for various reasons (guest comfort among them)KrisB:It was explained to me that 6-pax aren't considered "inspected" vessels, so the rules are a little different (including the designated spotter).