737 Naval Air Squadron 737 Naval Air Squadron..

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737 Naval Air Squadron

737 Naval Air Squadron operated initially from the Helicopter Support Ship RFA Engadine and later from the flight decks of eight County Class guided missile destroyers, such as HMS Glamorgan (D19), HMS Antrim (D18), and HMS Norfolk (D21). They supported these destroyers by conducting flights and also provided training for aircrew at RNAS Portland.
https://en.m.wikipedia.org/wik....i/737_Naval_Air_Squa

The helicopters, known as HAS.3s, played a role in hunting submarines at sea. They were equipped to carry two types of torpedoes - either Mark 44 or Mark 46 with parachutes - or four Mk.11 Depth Charges. Additionally, they were fitted with Plessey dipping Sonar for detecting submarines. These helicopters could also be armed with a door-mounted machine gun, making them self-sufficient in handling Anti-Submarine Warfare (ASW) operations.

During the late 1970s, most of the Wessex HAS.3 helicopters stationed at RNAS Portland were being replaced by Westland Sea Kings. The Sea Kings could carry more weaponry and had the added safety of twin engines, significantly extending their flying time.
https://military-history.fando....m.com/wiki/737_Naval