Re: Hull Vents
Foaming in gas tanks is a BAD idea because the foam will hold water against the aluminum and cause it to corrode thru fairly quickly. This is why none of the original Moesly SeaCrafts ever had the tanks foamed in. Potter didn't foam them in either, at least up thru 72, but it sounds like maybe the later CSY and Tracker boats may have had foamed in tanks.
The early Moesly sterndrives had vent scoops but no bilge blowers, as I don't think USCG required blowers on inboards till about 1967. The idea of the vent scoops is to have them facing forward on one side to force some air in when underway and aft on the other side to suck it out.
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