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catherine96821:Hawaiian cams are these things you wear instead of a BC....metal one hook over shoulder so they can crawl in for lobsters and leave the tank behind. Think half freedive, half scube.
Tom Winters:You shoot fish with a Hawaiian sling. That is a pretty fancy version of the Hawaiian backpack though. Once you start diving with one, throw away your tables and computer and always pack a case of Budweiser in case you get a little twitchy after your third dive to 200'.
You'll be fine by dive 5.