15 Military of the United Kingdom in Cornwall

700 Naval Air Squadron is an experimental test squadron in the Royal Navy’s Fleet Air Arm.

705 Naval Air Squadron was first formed as a flight in 1936 from No 447 Flight Royal Air Force and operated Swordfish torpedo bombers from battlecruisers. It achieved squadron status in 1939 before being disbanded in 1940. The squadron was re-formed briefly in 1945 and then again in 1947 as a fleet requirements unit to evaluate naval use of helicopters. Since the 1950s the squadron has been involved in the basic training of helicopter aircrew, and currently forms part of the Defence Helicopter Flying School at RAF Shawbury.

The Royal Navy Observer School grew out of HM Naval Seaplane Training School at RNAS Lee-on-Solent as a result of a series of changes of identity and parent unit. From 1918 until 1939 the Royal Air Force was responsible for naval aviation, including training and provision of aircrew to the Royal Navy. With the return of naval aviation to the Royal Navy on 24 May 1939, the Observer School was established as 750 Naval Air Squadron of the Fleet Air Arm. During World War II the squadron moved to Trinidad to continue training aircrew. It was temporarily disbanded in October 1945. The squadron reformed in 1952 and is currently based at RNAS Culdrose, where it trains approximately 30 Royal Navy observers every year.

771 Naval Air Squadron of the Fleet Air Arm was formed on 24 May 1939 at 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.

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.

820 Naval Air Squadron is a Royal Navy Fleet Air Arm carrier-based squadron flying the AgustaWestland Merlin HM2 in an Anti-Submarine role from RNAS Culdrose.

824 Naval Air Squadron is a Royal Navy Fleet Air Arm squadron based at RNAS Culdrose and currently operating the AgustaWestland Merlin HM2 Operational Conversion Unit. It trains aircrew in Anti-Submarine warfare

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.

829 Naval Air Squadron was a squadron of the Royal Navy Fleet Air Arm. Before it was decommissioned in March 2018, it operated the AgustaWestland Merlin HM2 helicopter.

849 Naval Air Squadron was a squadron of the Fleet Air Arm, the Air Arm of the British Royal Navy. It was formed during the Second World War as a carrier based torpedo-bomber, unit, flying missions against Japanese targets in the Far East. Its service since the Second World War has been as an airborne early warning squadron, flying fixed winged Skyraiders and Gannets from the Royal Navy's fixed wing carriers from 1952 until 1978, and airborne early warning Sea King helicopters from 1982 to 2018.

854 Naval Air Squadron was first formed on 1 January 1944, at Squantum Naval Air Station in the United States. It was disbanded in December 1945, and reformed December 2006 as a helicopter squadron designed for Airborne Surveillance and Control.

HMS Fisgard was a shore establishment of the Royal Navy active at different periods and locations between 1848 and 1983. She was used to train artificers and engineers for the Navy.

GCHQ Bude, also known as GCHQ Composite Signals Organisation Station Morwenstow, abbreviated to GCHQ CSO Morwenstow, is a UK Government satellite ground station and eavesdropping centre located on the north Cornwall coast at Cleave Camp, between the small villages of Morwenstow and Coombe. It is operated by the British signals intelligence service, officially known as the Government Communications Headquarters, commonly abbreviated GCHQ. It is located on part of the site of the former World War II airfield, RAF Cleave.

Remote Radar Head Portreath or RRH Portreath is an air defence radar station operated by the Royal Air Force. It has a coastal location at Nancekuke Common, approximately 1.25 kilometres (0.78 mi) north east of the village of Portreath in Cornwall, England.

HMS Raleigh is the basic training facility of the Royal Navy at Torpoint, Cornwall, United Kingdom. It is spread over several square miles, and has damage control simulators and fire-fighting training facilities, as well as a permanently moored training ship, the former HMS Brecon. Its principal function is the delivery of both New Entry Training & Basic Training.