| Unit Name: | 1820 Naval Air Squadron |
| Dates: | 1 April - 16 December 1944 |
| Type: | Dive-bomber squadron |
| Role: | Dive bomber |
| Size: | nine aircraft |
| Command Structure: | Fleet Air Arm |
| Garrison: | See Naval air stations section for full list. |
| Garrison Label: | Home station |
| Notable Commanders: | Lieutenant Commander(A) H.I.A. Swayne, DSC, RN |
| Identification Symbol: | Blue, in sinister chief a cloud proper issuant towards dexter base two lightning flashes and a rapier white. Wartime unofficial |
| Identification Symbol Label: | Squadron Badge Description |
| Identification Symbol 2: | 1A+ 4A+ (August 1944) |
| Identification Symbol 2 Label: | Identification Markings |
| Aircraft Bomber: | Curtiss Helldiver |
1820 Naval Air Squadron (1820 NAS) was a Fleet Air Arm (FAA) naval air squadron of the United Kingdom’s Royal Navy (RN). The squadron was established at Naval Air Station Brunswick in Maine, on 1 April 1944 and subsequently joined HMS Arbiter in July. Throughout its operational period, the squadron exclusively utilised the Curtiss Helldiver I aircraft. Nevertheless, the performance of this aircraft was deemed inadequate for its designated purpose, leading to the squadron's disbandment on 16 December 1944, at HMS Ringtail, RNAS Burscough.
1820 Naval Air Squadron formed on 1 April 1944, in the United States at RN Air Section Brunswick, located at United States Naval Air Station (USNAS) Brunswick, Maine, as a dive bomber squadron,[1] under the command of Lieutenant Commander(A) H.I.A. Swayne, DSC, RN.
It was equipped with nine Curtiss SB2C Helldiver, an American dive bomber. These were the Canadian built SBW-1B version for lend-lease to the Royal Navy and known as Helldiver I. The squadron strength was eight pilots and eight observers and they conducted familiarisation with the aircraft and equipment at Brunswick during April.[2]
The squadron moved to USNAS Squantum, Quincy, Massachusetts on 1 May 1955, where RN Air Section Squantum was located and continued to work-up for a couple of months, before it moved to RN Air Section Norfolk at USNAS Norfolk, Norfolk, Virginia, on 5 July 1944, to embark in the, .[3]
By the 7 July, all aircrew, equipment and aircraft were embarked in HMS Arbiter at Naval Station Norfolk and the carrier sailed to New York to embark further passengers.[2] On 10 July she then joined Convoy CU 31 and sailed for Liverpool.[4] 1820 Naval Air Squadron disembarked on 24 July and travelled to RN Air Section Speke, the aircraft towed by road. The squadron flew to RNAS Burscough (HMS Ringtail), Lancashire, on 11 August.[2]
Aircraft evaluation and a flying training program continued at RNAS Burscough (HMS Ringtail) until 23 October, when the squadron flew north to Scotland to operate out of RNAS Donibristle (HMS Merlin), Fife, to enable deck landing training and carrier trials aboard the Ruler-class escort carrier .
The aircraft type was found to be unsatisfactory for its intended purpose. The squadron lost a number of crews and aircraft due to accidents, with three failing to pull out of vertical dives. 1820 Naval Air Squadron was therefore disbanded at RNAS Burscough (HMS Ringtail) on 16 December 1994.
1820 Naval Air Squadron flew only one aircraft type:
1820 Naval Air Squadron operated from a number of naval air stations of the Royal Navy, in the United Kingdom, a number overseas, and a couple of Royal Navy escort carriers:
List of commanding officers of 1820 Naval Air Squadron with date of appointment: