It reformed at HMS Siskin, RNAS Gosport, in February 1944, as the User Trials Unit, however, the squadron was decommissioned for the second time in September 1945.

It reformed in February 1955, at HMS Peregrine, RNAS Ford, as a Fighter Pilot Holding Unit and equipped exclusively with jets.

In June 1957, 764 Naval Air Squadron moved to HMS Fulmar, RNAS Lossiemouth, utilising its satellite airfield, HMS Fulmar II, RNAS Milltown, and with it a change to multiple training roles: Air Weapons Training, Commanding Officers and Senior Pilots Designate Course, a Jet Fighter Pool and a Target Towing Unit.

From March to November 1965 a ‘B’ flight was formed at HMS Fulmar, to train Airwork Limited pilots to fly Supermarine Scimitar aircraft.

[7] Around May 1941, aircraft from 764 NAS started using Lawrenny Ferry, a Royal Naval established seaplane facility used to train Fleet Air Arm pilots in the art of flying seaplanes, which was situated 3 miles (5 km) north east of Pembroke Docks on the north side of the junction of the Cresswell and Carew rivers.

[9] The need for Seaplane Training had diminished by the middle of 1943 and eventually 764 Naval Air Squadron disbanded at RNAS Lawrenny Ferry (HMS Daedalus II) on 7 November 1943.

A further detachment from 764 NAS then operated out of RNAS Machrihanish (HMS Landrail), constructed close to Campbeltown in Argyll and Bute, Scotland.

In September 1944, on completion of net defence trials in the river Clyde, this detachment was absorbed into 778 Naval Air Squadron.

[10] 764 NAS remained at Lossiemouth for four months, relocating to RNAS Yeovilton (HMS Heron) sited a few miles north of Yeovil, in Somerset, on the 23 September 1953.

[12] 764 NAS initially worked with ten Hawker Sea Hawk and ten de Havilland Sea Vampire aircraft, and these enabled the squadron to provide conversion for United States trained personnel to British standards and procedures where required, and to provide valuable flying time to Fleet Air Arm pilots prior their posting to a first-line squadron.

[7] With the de Havilland Sea Vampire being dual controlled, this also enabled the squadron to provide tuition for fighter combat and ground attack techniques.

[7] The Squadron acquired four roles at RNAS Lossiemouth and these were, Air Weapons Training, a Commanding Officers and Senior Pilots Designate Course, a Jet Fighter Pool and a Target Towing Unit.

[7] The Sea Hawks were withdrawn by July, and therefore, by August 1959, the squadron was equipped solely with twelve Hawker Hunter T.8 two-seat trainers.

It retained only the Commanding Officers and Senior Pilots Designates Course from before and its new main role was Air Warfare Instructor Training,[7] but also provided a swept wing conversion course to the Hawker Hunter T.8 aircraft.

[7] In 1968 the main 764 Naval Air Squadron received Hawker Hunter T.8B and T.8C aircraft, both variants were fitted with TACAN navigation systems.