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NHA Membership Life Time Membership. NHA Membership Join Now. Region Map The Naval Helicopter Association NHA Advancing Naval Rotary Aviation As global dynamics evolve and new peacekeeping and operational agendas emerge the role of helicopters has become more critical than ever in todays military structure. The Naval Helicopter Association NHA stands at the forefront of this transformation representing the Navy Marine Corps and Coast Guards rotarywing and tiltrotor communities.