Pave Lows were used for special operations and for Combat Search-And-Rescue (CSAR). Both missions typically involve flying in hostile airspace. Because of this Pave Lows were fitted with terrain-following radar and an array of missile and radar warning equipment. To increase the helicopters' range, they were also equipped with larger external fuel tanks fitted to the stub wings and a nose-mounted air-to-air refuelling probe. The helicopters also had extensive communications equipment, with most of the associated antennas located on the upper aft fuselage and the tailboom.