Model Types ModelDel'dFromTo B-V CH-47C Chinook819721974 Hughes 369 / 500 / H-619701975 Sikorsky S-58 H-3411019651975 List of Aircraft Organisation Construction Numbers 1Bell 204 204B 8B-V CH-47 Chinook CH-47C Chinook 1Hughes 369 / 500 / H-6 OH-6A Cayuse 4Hughes 369 / 500 / H-6 369HS 4Sikorsky S-55 H-19 H-19A Chickasaw 5Sikorsky S-58 H-34 HSS-1 / SH-34G Seabat 85Sikorsky S-58 H-34 HUS-1 / UH-34D Seahorse 3Sikorsky S-58 H-34 HH-34F Seahorse