HSL-31

• Origins and Designation: Helicopter Anti-Submarine Squadron Light 31 (HSL-31) was established in 1967 at Naval Air Station North Island, California, as a Fleet Replacement Squadron (FRS) for training pilots and aircrews. • Nickname – “Arch Angels”: The squadron was known as the “Arch Angels,” a name reflecting both their guardian role and their association with the advanced technology of their helicopters. • Primary Mission: HSL-31 was responsible for training pilots and maintenance crews on the SH-2 Seasprite helicopter, a key anti-submarine warfare and utility helicopter for the US Navy. • Training Thousands: Over its 22 years of operation, HSL-31 trained thousands of pilots, aircrew, and maintenance personnel, making it a vital component in the Navy’s rotary-wing community. • First to Fly SH-2F: HSL-31 was among the first squadrons to receive and operate the SH-2F variant, which brought significant upgrades in avionics and anti-submarine warfare capability. • Support for LAMPS: The squadron played an important role in the Light Airborne Multi-Purpose System (LAMPS) program, preparing crews to operate from small surface combatants. • Markings and Colors: HSL-31 aircraft were recognized by their unique squadron markings, often featuring bold archangel imagery and tail codes indicating their training role. • Community Impact: HSL-31 personnel were active in the local San Diego community, participating in public demonstrations, air shows, and educational outreach events. • Disestablishment: The squadron was disestablished on 30 September 1988 as part of US Navy force realignments, with its training mission absorbed by other units. • Legacy in the Fleet: Many HSL-31 alumni went on to command operational squadrons or serve in key leadership roles, ensuring the “Arch Angels” legacy lived on throughout the US Navy helicopter community.