** Supermarine Sea Lion II and III ( 1922 )

** Supermarine Seafire ( 1941 ) – single-seat carrier-based fighter version of the Spitfire

** Supermarine Spitfire ( early Merlin powered variants ) – Merlin engine variants

** Supermarine Spitfire ( late Merlin powered variants ) – two-stage Merlin engine variants

** Supermarine Spitfire ( Griffon powered variants ) – two-stage Griffon engine variants

** Supermarine Spitfire variants: specifications, performance and armament

** List of Supermarine Spitfire operators

** List of surviving Supermarine Spitfires

** The British escort carriers Attacker, Battler, Hunter, and Stalker fly off 26 Supermarine Seafires to operate from Paestum airfield in the Salerno beachhead, then withdraw to Palermo, Sicily, to refuel.

** Commander Biard, flying the Supermarine route between Southampton and Le Havre, knocks his passenger out during the flight.

** Supermarine Spitfire Marks V to Mark 20

** Supermarine Attacker

** Supermarine Seafang

** Supermarine Spiteful

** Supermarine Spitfire — Marks 21 and later

** James O ' Meara, British Battle of Britain Spitfire Flying Ace ( d. 1974 )

** No. 2 PRU Squadron RAF ( Photo Reconnaissance ) ( Spitfire VB )

** 48 Spitfire squadrons

** " Aces High ", depicts Eddie in a Spitfire cockpit.

** No. 79 Squadron ( Spitfire )

** No. 452 Squadron ( Spitfire )

** No. 457 Squadron ( Spitfire )

** 125 Wing ( Spitfire )

** RCAF 126, 127 Wings ( Spitfire )

** Flotilla-the flotilla is the operational part of the Coast Guard, and consists of 3 vessels.

** 4 T-55 main battle tanks ( operational status uncertain )

** Land Force Command-Land Force Command is the operational organisation of the RFMF, and is responsible for all of the main units:

** Warsaw surrenders to Germany ; Modlin surrenders a day later ; the last Polish large operational unit surrenders near Kock 8 days later.

** The first electric bus becomes operational in New York City.

** Planning, Training, and Exercise Support ( PTE )-Our mission is to ensure NCS readiness, enhance partnerships within government and industry, coordinate telecommunications operational planning among NCS elements, develop emergency response requirements, and to provide skilled civilians and reservists during crises and emergencies.

** Abteilung Landesverteidigungsführungsamt ( WFA / L ) a subdepartment through which all details of operational planning were worked out, and from which all operational orders were communicated to the OKW.

** Lower prices due to lowered operational costs for a given route.

** Since 1941 ( decommissioned in 1997, still operational ) Forsby-Köping limestone cableway, Sweden.

** ( decommissioned in 1997 ; still operational ) Forsby-Köping limestone cableway.

** Project commissioning, the process of assuring that all systems and components of a building or industrial plant are designed, installed, tested, operated, and maintained according to the operational requirements of the owner or final client

** allop: returns all operational attributes, for clients that don't know how to request them

** Naval Air Station Glenview, an operational U. S. Naval Air Station from 1923 to 1995

** SLS-2: CZ-2C, CZ-2D and CZ-4C, operational since 2003

** 406 Maritime Operational Training Squadron is an operational training squadron for training all maritime helicopter aircrew in the Canadian Forces.

** 423 Maritime Helicopter Squadron is an operational squadron at Shearwater Heliport which provides CH-124 Sea King helicopters for Maritime Forces Atlantic warships.

** 12 Air Maintenance Squadron provides aircraft maintenance and engineering support to 12 Wing's operational squadrons.

** 443 Maritime Helicopter Squadron is an operational squadron which provides CH-124 Sea King helicopters for Maritime Forces Pacific warships.

** The Germans make the first operational use of their radio-controlled Henschel Hs 293 anti-ship missile.

** The TFOS is an operational and coordinating entity.

** For meritorious operational service in the Persian Gulf during enforcement of sanctions in support of United Nations Security Council Resolutions and the subsequent period of hostilities against Iraq to liberate Kuwait in 1990-91.

** For meritorious operational service in the Persian Gulf during enforcement of sanctions in support of United Nations Security Council Resolutions and the subsequent period of hostilities against Iraq to liberate Kuwait in 1990-91.

** For meritorious operational service in the Northern Arabian Gulf during Operation Catalyst from 1 November 2005 to 25 March 2006 while conducting maritime security operations in support of the Australian Government's contribution to the rehabilitation and rebuilding of Iraq.