Dr. Lecter
Contributor
Hawaii is going to be hit-or-miss. Officially, every diver taken diving by an op here is going to be required to dive "with" a guide/the group (chartering a boat and taking yourself diving is a different question). Unofficially, if you show up and demonstrate that you know what you're doing and have the appropriate gear for it (pony or other redundancy, bag/spool or reel, etc), just what "with" means... is open to a rather broad construction. But demonstrate is the key term here: not talk about how you know what you're doing, and not necessarily just wave a solo card around (though the card can't hurt).