I have been sailing in the race for thirty + years and know the OA and PRO. They included part of our (GYA MHC) safety recommendations but left parts unclear; ie synthetic trap wires.

The NoR states that only PHRF rated boats are eligible. We re-established the Class for PHRF multihulls through negotiations with the chain of command about ten or twelve years ago.

FYI, I believe Gene Wallet still owns the record he set in the late sixties/early seventies on a P-Cat with spinnaker.