MIL-H-23599A, MILITARY SPECIFICATION: HOOK, RESCUE (05-JUN-1969) [S/S BY MIL-DTL-23599B]

MIL-H-23599A, MILITARY SPECIFICATION: HOOK, RESCUE (05-JUN-1969) [S/S BY MIL-DTL-23599B]., This specification covers the requirements for one type of helicopter rescue hook.