Sikorsky HH-3A Big Mother

Search and rescue variant for the US Navy converted from SH-3A. Modifications included armor, 7.62 mm miniguns, DECK-EDGE refueling capability, external fuel tanks and all ASW equipment removed. They were extensively used during the Vietnam War to rescue downed aircrews. Used by US Navy squadrons HC-7 and HC-9.

The US Air force used their own variant, the HH-3E Jolly Green Giant, based on the S-61R.