The Sikorsky SH-3 Sea King is an American twin-engined anti-submarine warfare (ASW) helicopter designed and built by Sikorsky Aircraft. A landmark design, it was one of the first ASW rotorcraft to use turboshaft engines.
The Westland Wessex is a British-built turbine-powered development of the Sikorsky H-34. It was developed and produced under licence by Westland Aircraft. One of the main changes from Sikorsky's H-34 was the replacement of the piston-engine powerplant with a turboshaft engine. Early models were powered by a single Napier Gazelle engine, while later builds used a pair of de Havilland Gnome engines.
The Westland WS-61 Sea King is a British licence-built version of the American Sikorsky S-61 helicopter of the same name, built by Westland Helicopters. The aircraft differs considerably from the American version, with Rolls-Royce Gnome engines, British-made anti-submarine warfare systems and a fully computerised flight control system. The Sea King was primarily designed for performing anti-submarine warfare (ASW) missions. A Sea King variant known as the Commando was developed by Westland to serve as a troop transport.
Helicopter Maritime Strike Squadron Five One (HSM-51), also known as "Warlords," is a United States Navy helicopter squadron stationed at Naval Air Facility Atsugi, located in Ayase City, Kanagawa Prefecture, Honshu, Japan. HSM-51 is part of the Helicopter Maritime Strike Wing, Pacific Fleet, which consists of seven squadrons based in San Diego. The squadron regularly deploys on various ships within the U.S. Navy's Seventh Fleet, primarily stationed in Yokosuka, Japan.
771 Naval Air Squadron of the Fleet Air Arm was formed on 24 May 1939 at HMS Daedalus, Lee-on-Solent as a Fleet Requirements Unit with 14 Fairey Swordfish TSR biplanes. The squadron carried out various exercises with ships and provided towed targets for naval air gunners, and was decommissioned on 22 March 2016.
The Indian Naval Air Arm is the aviation branch and a fighting arm of the Indian Navy which is tasked to provide an aircraft carrier-based strike capability, fleet air defence, maritime reconnaissance, and anti-submarine warfare.
814 Naval Air Squadron or 814 NAS, nicknamed the Flying Tigers, is a squadron of the Royal Navy Fleet Air Arm. It is currently equipped with the AgustaWestland Merlin HM2 anti-submarine warfare helicopter and is based at Royal Naval Air Station (RNAS) Culdrose in Cornwall. The squadron was formed in December 1938 and has been disbanded and reformed several times.
Helicopter Sea Combat Squadron SIX (HSC-6), is a helicopter squadron of the United States Navy. It was established as Helicopter Antisubmarine Squadron SIX (HS-6) on 1 June 1956. Its nickname is Screamin’ Indians. On 8 July 2011 it was redesignated Helicopter Sea Combat Squadron SIX (HSC-6). It is based at Naval Air Station North Island, is part of Carrier Air Wing 17 and deploys aboard the aircraft carrier USS Nimitz (CVN-68).
Helicopter Sea Combat Squadron FIVE (HSC-5), also known as the Nightdippers, is a helicopter squadron of the United States Navy based at Naval Station Norfolk operating the Sikorsky MH-60S Seahawk. The Nightdippers are a part of Carrier Air Wing Seven and deploy aboard USS George H. W. Bush (CVN-77) to provide anti-surface warfare, search and rescue, vertical replenishment, Combat Search and Rescue and Naval Special Warfare Support capabilities to the carrier strike group.
Helicopter Sea Combat Squadron 11 (HSC-11), also known as the Dragonslayers, is a United States Navy helicopter squadron based at Naval Air Station Norfolk as part of Carrier Air Wing 1 operating MH-60S helicopters deployed aboard aircraft carriers. The squadron was established on 27 June 1957 at Naval Air Station Quonset Point as Helicopter Anti-Submarine Squadron 11 (HS-11) with Sikorsky HSS-1 Seabat helicopters. In 2016, HS-11 transitioned to MH-60S and re-designated as HSC-11.
The Pakistan Naval Air Arm is the naval aviation and military administrative branch of the Pakistan Navy.
826 Naval Air Squadron was a Fleet Air Arm aircraft squadron formed during World War II which has been reformed several times since then until last disbanded in 1993.
737 Naval Air Squadron was a Naval Air Squadron of the Royal Navy's Fleet Air Arm. It was initially active during 1943 as an amphibious Bomber Reconnaissance Training Squadron. Reactivated in 1944 it operated as an ASV Training Unit until 1945. It was active again between 1949 and 1957. From 1959 it was the Anti-Submarine Warfare school at RNAS Portland. It operated Westland Wessex HAS.3 rescue helicopters from their land base at RNAS Portland, Dorset.
The History of Royal Navy Helicopter Search and Rescue has its roots in the adoption by the Royal Navy of helicopters in the plane guard role. From a purely military tasking Royal Navy squadrons came to share the provision of search and rescue SAR coverage for the United Kingdom with the Royal Air Force and commercial providers under contract to Her Majesty's Coastguard, being responsible for two sectors out of twelve. From 2015 both the RAF and the Navy will surrender the civilian SAR role to contractors operating on behalf of the Coastguard.
706 Naval Air Squadron was a Naval Air Squadron of the Royal Navy's Fleet Air Arm. Established as a fighter and torpedo-bomber training unit in Australia at the end of World War Two, it was briefly reformed as a helicopter squadron in the early 1950s, before becoming a helicopter training unit in 1962, and operating until 1998.
Helicopter Maritime Strike Squadron 73 (HSM-73) is a United States Navy Maritime Strike helicopter squadron based on Naval Air Station North Island, California.
The Tughril-class frigates, formally classified as the Type 054A/P frigates, are a series of modified guided-missile frigates built by Hudong–Zhonghua Shipbuilding (HDZH), for the Pakistan Navy. The Type 054A/P is a modified derivative of the Type 054A frigate and was specifically customised to meet the operational requirements of the Pakistan Navy; the class features several capabilities - including anti-surface warfare (ASuW), anti-aircraft warfare (AAW), anti-submarine warfare (ASW) and low radar observability. The frigates form the mainstay of the Pakistan Navy's active naval fleet. The class also supplants the obsolete Tariq-class destroyers.
222 ASW Squadron also known as the Stingrays is a helicopter squadron from the Pakistan Naval Air Arm which specializes in Anti-submarine warfare. It is stationed at PNS Mehran in Karachi and flies Harbin Z-9EC helicopters out of its home base and various ships of the Pakistan Navy.
The 333 Squadron also known by its nickname the Seagulls is a helicopter squadron of the Pakistan Naval Air Arm which operates Aérospatiale Alouette III helicopters stationed at PNS Mehran. With its helicopters deployed aboard various ships of the Pakistan Navy, the squadron is assigned with anti-submarine warfare role while also conducting secondary duties ranging from SAR to MEDEVAC.
28 ASW Squadron is a maritime patrol squadron of the Pakistan Navy stationed at PNS Mehran in Karachi. Equipped with Lockheed P-3C Orions, the squadron is assigned Anti-submarine warfare wartime role.
Pakistan 
Pakistan Navy 
