OPV-14 Appendice 1 Helicopter Hoist Operations (HHO) (a) Terminology (1) Helicopter Hoist Operations (HHO) Flight. A flight by a helicopter operating under an HHO approval, the purpose of which is to facilitate the transfer of persons and/or cargo by means of a helicopter hoist. (2) HHO Crew Member. A crew member who performs assigned duties relating to the operation of a hoist. (3) HHO Offshore....