The H-3 is a twin-engine, all-weather helicopter. This multi-purpose helicopter serves a variety of missions: carrier-based anti-submarine warfare (SH-3H); utility and torpedo recovery (UH-3H); logistics (UH-3H); and search and rescue (UH-3H); and executive transport (VH-3D)

The SH-3H Sea King is deployed from an aircraft carrier, supporting anti-submarine warfare missions. Serving in air operations as plane guard and search and rescue for fixed-winged aircraft, the Sea King is the first aircraft in the air and the last to land. The UH-3H model is configured for logistical support and search and rescue missions.

Marine Helicopter Squadron One (HMX-1) flies the VH-3D to support the executive transport mission for the President of the United States.