A frogman is someone who is trained in scuba diving or swimming underwater in a tactical capacity that includes military, and in some European countries, police work. Such personnel are also known by the more formal names of combat diver, combatant diver, or combat swimmer. The word frogman first arose in the stage name the "Fearless Frogman" of Paul Boyton in the 1870s and later was claimed by John Spence, an enlisted member of the U.S. Navy and member of the OSS Maritime Unit, to have been applied to him while he was training in a green waterproof suit.
The submarine film is a subgenre of war film in which the majority of the plot revolves around a submarine below the ocean's surface. Films of this subgenre typically focus on a small but determined crew of submariners battling against enemy submarines or submarine-hunter ships, or against other problems ranging from disputes amongst the crew, threats of mutiny, life-threatening mechanical breakdowns, or the daily difficulties of living on a submarine.
A diver propulsion vehicle (DPV), also known as an underwater propulsion vehicle, sea scooter, underwater scooter, or swimmer delivery vehicle (SDV) by armed forces, is an item of diving equipment used by scuba divers to increase range underwater. Range is restricted by the amount of breathing gas that can be carried, the rate at which that breathing gas is consumed, and the battery power of the DPV. Time limits imposed on the diver by decompression requirements may also limit safe range in practice. DPVs have recreational, scientific and military applications.
Ian Edward Fraser, was an English diving pioneer, sailor and recipient of the Victoria Cross, the highest award for gallantry in the face of the enemy that can be awarded to British and Commonwealth forces. Fraser was born in Ealing in Middlesex and went to school in High Wycombe. After initially working on merchant ships and serving in the Royal Naval Reserve, he joined the Royal Navy at the start of the Second World War. After being awarded the Distinguished Service Cross for actions while serving on submarines, he was placed in command of a midget submarine during an attack in Singapore codenamed Operation Struggle. For his bravery in navigating the mined waters, and successfully placing mines on a Japanese cruiser, Fraser was awarded the Victoria Cross.
Human torpedoes or manned torpedoes are a type of diver propulsion vehicle on which the diver rides, generally in a seated position behind a fairing. They were used as secret naval weapons in World War II. The basic concept is still in use.
The Decima Flottiglia MAS was an Italian flotilla, with marines and commando frogman unit, of the Regia Marina created during the Fascist regime.
Italian submarine Scirè was an Adua-class submarine, built in the 1930s which served during World War II in the Regia Marina. It was named after a northern region of Ethiopia, at the time part of Italian East Africa.
A clearance diver was originally a specialist naval diver who used explosives underwater to remove obstructions to make harbours and shipping channels safe to navigate, but the term "clearance diver" was later used to include other naval underwater work. Units of clearance divers were first formed during and after World War II to clear ports and harbours in the Mediterranean and Northern Europe of unexploded ordnance and shipwrecks and booby traps laid by the Germans.
Marquis Luigi Durand de la Penne was an Italian Navy admiral who served as naval diver in the Decima MAS during World War II. He was born in Genoa, where he also died.
The Russian commando frogmen, informally called "commando frogmen" in civilian media, are a Russian Naval Spetsnaz unit under operational subordination to the Main Intelligence Directorate (GRU). It is the special forces unit of the Russian Naval Infantry and is composed of highly trained and elite marines within the Naval Infantry. By virtue of belonging to the Russian Naval Infantry, frogmen fall under the Coastal Troops of the Russian Navy service arm. The Russian Navy proper does not field any special forces or special operations units. Russian FSB special forces Alpha Group and Vympel also have frogman units in their respective naval components.
Britain's commando frogman force is now the Special Boat Service (SBS), whose members are drawn largely from the Royal Marines. They perform various operations on land as well as in the water. Until the late 1990s, all members of the Special Air Service (SAS) Boat Troop were trained as commando frogmen.
Sydney Knowles, BEM, was a British Royal Navy frogman during and after World War II.
Lieutenant-Commander Lionel Kenneth Phillip Crabb,, known as Buster Crabb, was a Royal Navy frogman and diver who vanished during a reconnaissance mission for MI6 around a Soviet cruiser berthed at Portsmouth Dockyard in 1956.
The auxiliary ship Olterra was a 5,000 ton Italian tanker scuttled by her own crew at Algeciras in the Bay of Gibraltar on 10 June 1940, after the entry of Italy in World War II. She was recovered in 1942 by a special unit of the Decima Flottiglia MAS to be used as an undercover base for manned torpedoes in order to attack Allied shipping at Gibraltar.
The Motorised Submersible Canoe (MSC), nicknamed Sleeping Beauty, was built by the British Special Operations Executive (SOE) during World War II as an underwater vehicle for a single frogman to perform clandestine reconnaissance or attacks against enemy vessels.
Naval Special Forces Command, also called the Kampfschwimmer or Verwendungsgruppe 3402 are an elite special operations unit of the German Navy, specializing in commando and amphibious warfare operations. They are the only special-purpose force of the German Navy. The Kampfschwimmer were set up when West Germany joined NATO in 1955 making it the oldest german SOF.
Anthony "Lofty" William Charles Eldridge DSC was a Royal Navy officer of the Second World War who led a human torpedo attack that sank two Japanese ships off Phuket, Thailand, for which he received the Distinguished Service Cross.
Licio Visintini was an Italian naval officer during World War II. Visintini was decorated for his operations against Allied shipping in Gibraltar during the Battle of the Mediterranean. His brother Mario Visintini was a famous flying ace; both were killed during the war.
The following index is provided as an overview of and topical guide to underwater divers:
The Servizio Informazioni Segrete was the intelligence service of the Royal Italian Navy. SIS was instrumental in moulding Italian Army's operations during the Second Italo-Ethiopian War and the Battle of the Mediterranean, primarily due to its cryptanalysis successes and undercover operations.
