Sikorsky SH-3 Sea King

The naval helicopter that mastered the oceans

A U.S. Navy Sikorsky SH-3A Sea King helicopter of fleet composite squadron VC-1. © PH2 (AC) Westhusing, U.S. Navy

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Overview

Sikorsky Helicopter United States ICAO: S61 1961–1980 Active $9 million

The Sikorsky SH-3 Sea King became one of the most important naval helicopters of the Cold War. Designed for anti-submarine warfare and maritime search and rescue, it introduced turbine power to carrier-based rotary operations and served with navies around the world for decades.

Live Fleet Activity (S61)

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Specifications

Units
Engine
2 × General Electric T58-GE-10 turboshafts
Engine type
Turboshaft
Power
2 × 1,400 shp · 1,044 kW
Avionics
AlliedSignal AQS-13 sonar
Wing tips
No winglets
Seats
3
Crew
—
Cabin width
—
Cabin height
—
Cabin length
—
Exterior length
54 ft 9 in  ·  16.70 m
Tail height
16 ft 10 in  ·  5.13 m
Fuselage diameter
—
Wing span
62 ft 4 in  ·  19.00 m
Baggage volume
—
Gross weight
—
Empty weight
—
Max takeoff weight
22,100 lb  ·  10,000 kg
Max landing weight
—
Max payload
8,000 lb  ·  3,650 kg
Fuel capacity
980 gal · 3,700 L · 3,000 kg (Jet A)
Max cruise speed
144 kt  ·  166 mph  ·  267 km/h
Maximum speed
—
Cruise speed
—
Approach speed
—
Range
540 nm  ·  620 mi  ·  1,000 km
Fuel burn
0.73 nm/gal  ·  0.36 km/L
Ceiling
14,700 ft  ·  4,500 m
Rate of climb
2,200 ft/min  ·  11 m/s
Takeoff distance
—
Landing distance
—
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A U.S. Navy Sikorsky SH-3D Sea King of HS-84 in flight.

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Operational Context

Sikorsky SH-3 Sea King — the pioneer of modern naval helicopters

The Sikorsky SH-3 Sea King first flew in 1959 and entered U.S. Navy service in 1961. It was the first U.S. Navy helicopter designed from the outset as a twin-engine, all-weather anti-submarine warfare platform. Powered by turboshaft engines, it offered greater reliability and performance than earlier piston-powered naval helicopters.

The Sea King featured a boat-shaped hull and retractable landing gear, allowing it to land on water if necessary. Its primary mission was to detect and track submarines using dipping sonar and sonobuoys, while also carrying torpedoes or depth charges. The aircraft’s range and endurance made it well suited for carrier group protection during the Cold War.

Beyond anti-submarine operations, the SH-3 proved highly versatile. It was widely used for search and rescue missions, medical evacuation, and utility transport. Variants served as presidential transport aircraft, known as Marine One when carrying the President of the United States. Numerous international versions were produced under license, including in the United Kingdom, Italy, and Japan.

Over its long service life, the Sea King was continually upgraded with improved avionics and mission systems. Although many have been retired from front-line naval service, some continue to operate in secondary roles and with civilian operators.

The SH-3 Sea King remains a landmark in naval aviation, helping establish the helicopter as a central component of modern maritime warfare and rescue operations.