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 Clearance Diving Branch is the specialist diving unit of the Royal Australian Navy (RAN) whose versatile role covers all spheres of military diving, and includes explosive ordnance disposal and maritime counter-terrorism. The Branch has evolved from traditional maritime diving, and explosive ordnance disposal, to include a special operations focus.
The Singapore Armed Forces (SAF) are the military services of the Republic of Singapore, responsible for protecting and defending the security interests and the sovereignty of the country. A military component of the Ministry of Defence (MINDEF), the armed forces have four service branches: the Army, the Navy, the Air Force, and the Digital and Intelligence Service. An integrated force, it is one of the most capable, robust, technologically sophisticated and powerful militaries in Southeast Asia and the surrounding regions. The SAF is headed by the chief of defence force, appointed by the president of Singapore, on the advice of the Cabinet.
The Republic of Singapore Navy (RSN) is the maritime service branch of the Singapore Armed Forces (SAF) responsible for defending the country against any seaborne threats and as a guarantor of its sea lines of communications. The RSN traces its origins to the Royal Navy when Singapore was still a crown colony of the British Empire. The service was formally established in 1967, two years after its independence from Malaysia in 1965, and had undergone a substantial modernisation ever since – which has led them into becoming the most powerful navy in Southeast Asia.
The Naval Special Warfare Command, commonly known as the Royal Thai Navy SEALs, is the special operations force of the Royal Thai Navy.
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 Fuerzas Especiales, commonly known asFES(the initials of their motto) is a Tier 1 special operations unit of the Mexican Navy - Marines officially established in late 2001. Its motto is "Fuerza, Espíritu, Sabiduría", they are currently under the naval special operations command, Unidad de Operaciones Especiales, commonly known as UNOPES.
The Naval Special Operations Command (NAVSOCOM) is a separate command of the Philippine Navy trained in special operations, sabotage, psychological and unconventional warfare and is heavily influenced by the United States Navy SEALs. NAVSOCOM is headquartered at Naval Base Heracleo Alano Sangley Point, Cavite City. It has eleven units located across the Philippines, from Naval Operating Base San Vicente at Santa Ana, Cagayan in the north to Naval Station Zamboanga in the south.
Minedykkerkommandoen (MDK) or Norwegian Naval EOD Command is a clearance diver group. MDK is subordinate to the Royal Norwegian Navy. MDK is located at Haakonsvern Naval Base in Bergen and Ramsund Naval Base, in vicinity of Harstad.
The Pingat Jasa Gemilang (Tentera) is a decoration awarded to members of the Singapore Armed Forces for exceptionally distinguished performance or extraordinary service, or the furtherance of links with overseas forces.
The US employs divers in several branches of the armed forces, including the navy, army, marines, air force and coast guard.
The Marine Assault Team (MAST), formally known as the UNGERIN is a maritime counter terrorism and tactical unit of the Royal Malaysia Police's Marine Operations Force. Fully operational in 2007, the UNGERIN conducts anti-piracy and counter-terrorism operations in the coastal waters surrounding Malaysia and assists the marine police to respond swiftly.
The Special Operations Task Force (SOTF) is a special operations command of the Singapore Armed Forces (SAF) responsible for conducting special operations. The SOTF is composed of only highly-trained regular servicemen from the Army's Special Operations Force (SOF) under the Commandos formation and, the Navy's Special Warfare Group (SWG) under the Naval Diving Unit (NDU).
The Naval Special Warfare Development Group (NSWDG), abbreviated as DEVGRU and commonly known as SEAL Team Six, is the United States Navy component of the Joint Special Operations Command (JSOC). The unit is often referred to within JSOC as Task Force Blue. DEVGRU is administratively supported by Naval Special Warfare Command and operationally commanded by JSOC. Most information concerning DEVGRU is designated as classified, and details of its activities are not usually commented on by either the United States Department of Defense or the White House. Despite the official name changes, "SEAL Team Six" remains the unit's widely recognized moniker.
The Invincible-class submarines, formally classified as the Type 218SG submarines, is a class of conventionally-powered attack submarines, ordered by the Republic of Singapore Navy (RSN) from German-based naval conglomerate ThyssenKrupp Marine Systems (TKMS). The Type 218SG is an extensively-customised derivative of the export-oriented Type 214 submarine, with specific design characteristics drawn from Type 212 submarines. They feature several capabilities, including a substantial level of automation, a significant payload capacity, enhanced underwater endurance and superlative ergonomics.
The Singapore Armed Forces Volunteer Corps (SAFVC) is a uniformed volunteer auxiliary branch of the Singapore Armed Forces. It was established on 13 October 2014 to allow Singaporean women, first generation permanent residents and naturalised citizens, all of whom would otherwise not be subject to an obligation to serve national service, to contribute their part towards Singapore's defence. It also aims to strengthen support for national service by understanding the duties of national servicemen.
Special Forces Underwater Operations (SFUWO) is the term for United States Army Special Forces combat operations involving the use of underwater infiltration methods. These typically involve the use of closed circuit dive equipment to infiltrate a beach landing site (BLS) undetected. The US Army Special Forces, also known as Green Berets have been conducting maritime operations and underwater operations since their founding in 1952. Currently, each company within a Special Forces Group mans, trains, equips, and deploys a SFUWO Operation Detachment Alpha (SFOD-A). These twelve-man teams train for SFUWO as their primary infiltration method when conducting one of their missions of unconventional warfare, direct action, counter-terrorism, foreign internal defense, among others.
Singapore 
Republic of Singapore Navy 
