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 GIUK gap is an area in the northern Atlantic Ocean that forms a naval choke point. Its name is an acronym for Greenland, Iceland, and the United Kingdom, the gap being the two stretches of open ocean among these three landmasses. It separates the Norwegian Sea and the North Sea from the open Atlantic Ocean. The term is typically used in relation to military topics. The area has for some nations been considered strategically important since the beginning of the 20th century.
Underwater divers may be employed in any branch of an armed force, including the navy, army, marines, air force and coast guard. Scope of operations includes: search and recovery, search and rescue, hydrographic survey, explosive ordnance disposal, demolition, underwater engineering, salvage, ships husbandry, reconnaissance, infiltration, sabotage, counterifiltration, underwater combat and security.
Submarine warfare is one of the four divisions of underwater warfare, the others being anti-submarine warfare, mine warfare and mine countermeasures.
A midget submarine is any submarine under 150 tons, typically operated by a crew of one or two but sometimes up to six or nine, with little or no on-board living accommodation. They normally work with mother ships, from which they are launched and recovered and which provide living accommodation for the crew and support staff.
The United States Naval Special Warfare Command (USNSWC), also known as NAVSPECWARCOM and WARCOM, is the naval component of United States Special Operations Command, the unified command that oversees and conducts the nation's special operations and missions.
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.
The Naval Diving Unit (NDU), also referred to as the Naval Divers, is the special forces formation of the Republic of Singapore Navy (RSN) responsible for conducting special operations from sea, air, and land. The formation is made up of six squadrons, specialising in explosive ordnance disposal, underwater demolition, maritime security operations, and combatant craft operations.
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.
The Frogman Corps is the maritime special operations force of the Danish Armed Forces part of Special Operations Command. On 1 July 2015, the Frogman Corps transferred from the Royal Danish Navy to the newly established Special Operations Command.
Underwater demolition is the deliberate destruction or neutralization of man-made or natural underwater obstacles, both for military and civilian purposes.
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.
The Kopaska is the premier frogman and underwater demolition unit of the Indonesian Navy. The unit's motto is in Sanskrit: Tan Hana Wighna Tan Sirna. The unit's main duties are underwater demolition, destroying main underwater installations, reconnaissance, prisoner snatches, preparing beaches for larger naval amphibious operations, and counter-terrorism. During peacetime, the unit also deploys a team to serve as security personnel for VIPs and VVIPs. The personnel of Kopaska are recruited from Indonesian Navy seamen. Like other Indonesian special forces, Kopaska is trained to be able to conduct operations in the sea, including underwater, on land and airborne.
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 U-boat campaign from 1914 to 1918 was the World War I naval campaign fought by German U-boats against the trade routes of the Allies. It took place largely in the seas around the British Isles and in the Mediterranean. The German Empire relied on imports for food and domestic food production and the United Kingdom relied heavily on imports to feed its population, and both required raw materials to supply their war industry; the powers aimed, therefore, to blockade one another. The British had the Royal Navy which was superior in numbers and could operate on most of the world's oceans because of the British Empire, whereas the Imperial German Navy surface fleet was mainly restricted to the German Bight, and used commerce raiders and unrestricted submarine warfare to operate elsewhere.
Naval Special Forces Command, also called the Kampfschwimmer or Verwendungsgruppe 3402 are an elite special forces 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.
Seabed warfare is undersea warfare which takes place on or in relation to the seabed.
The Multi-Role Ocean Surveillance Ship (MROSS) is a type of research and surveillance ship in development since 2021 for the United Kingdom's Royal Fleet Auxiliary. The first ship, RFA Proteus, is a commercial ship converted to the role which entered service in October 2023. The second ship is planned as a new build vessel. Both ships are to be used by the RFA to research and protect critical undersea national infrastructure, such as undersea cables and gas pipelines, in both British and international waters.
