History
The first notice of the employment of combat divers by Portugal occurred in 1580, during the War of the Portuguese Succession. In that occasion, Portuguese combat divers attacked the enemy Spanish ships that were in the Tagus, in order to damage their hulls.
In the scope of the Overseas war in Portuguese Guinea, the Portuguese Navy detected the use of naval mines by the enemy forces of the PAIGC. To deal with that threat, in 1966, the No. 1 Sappers Divers Section was created and deployed to Guinea. In 1968, the No. 2 Sappers Divers Section is also created.
In 1972, the two sappers divers sections are transformed in two larger sappers divers detachments (DMS, destacamentos de mergulhadores sapadores). The DMS continue to be assigned to the Navy's Guinea Maritime Defense Command due to the operational imperatives of its activities.
The DMS were disbanded in 1975, after the end of the Overseas War. Afterwards the operational activity of the divers was assigned to the Navy's Divers School.
The Sappers Divers Detachment No. 1 (DMS1) was reactivated on 1 June, 1988, because there was a need of an operational unit specially dedicated to the military diving area. Public interest activities, namely salvage diving and air-sea rescue were still assigned to the Divers School.
When, on 1 January, 1995, the DMS2 was reactivated (with twenty elements instead of thirteen), all operational activity was assigned to the detachments, with Divers School becoming only dedicated to the instruction activities.
In 2004, the Sappers Divers Group is created, grouping the DMS1, the DMS2 and the Divers School under a single Command.
A divers unit focused in mine warfare is created in 2008, this being the Sappers Divers Detachment No. 3 (DMS-MW).
The Sappers Divers Group is under the command of the Portuguese Navy Submarine Squadron.
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.
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.
Insignias and badges of the United States Navy are military badges issued by the United States Department of the Navy to naval service members who achieve certain qualifications and accomplishments while serving on both active and reserve duty in the United States Navy. Most naval aviation insignia are also permitted for wear on uniforms of the United States Marine Corps.
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 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.
A United States Navy diver refers to a service personnel that may be a restricted fleet line officer, civil engineer corps (CEC) officer, Medical Corps officer, or an enlisted who is qualified in underwater diving and salvage. Navy divers serve with fleet diving detachments and in research and development. Some of the mission areas of the Navy diver include: marine salvage, harbor clearance, underwater ship husbandry and repair, submarine rescue, saturation diving, experimental diving, underwater construction and welding, as well as serving as technical experts to the Navy SEALs, Marine Corps, and Navy EOD diving commands.
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 Portuguese Marine Corps constitutes the Elite Marine Commandos and the Special Operations Branch of the Portuguese Navy. It has roles similar to the ones of the USMC Reconnaissance Battalions and of the Royal Marine Commandos and the 75th Ranger Regiment The Corps is specialised in air assault, amphibious warfare, anti-tank warfare, coastal reconnaissance and raiding, commando style raids, counterinsurgency, desert warfare, indirect fire support raiding, irregular warfare, ISTAR, jungle warfare, maneuver warfare, maritime interdiction, mountain warfare, providing security at naval base or shore stations, reconnaissance for gathering military intelligence, support special operations, tracking targets, urban warfare, and VBSS operations. It is an Elite Marine Commando Force, operating as a rapid-reaction force. Today's Corpo de Fuzileiros is the premier raid force. The Fuzileiros remains an all-volunteer force with an intensive screening and selection process followed by combat-focused training. Fuzileiros are resourced to maintain exceptional proficiency, experience and readiness.
The Special Actions Detachment or DAE is the tier one special force maritime unit of the Portuguese Navy. It is part of the Portuguese Marine Corps. Raised in 1985, the DAE is one of the smallest special forces units within the Portuguese Armed Forces. It is responsible for conducting air-sea rescue, amphibious reconnaissance, amphibious warfare, black operation, bomb disposal, CBRN defense, coastal raiding, counterterrorism, direct action, executive protection, hostage rescue, irregular warfare, ISTAR, long-range penetration, JTAC, manhunt high-value target, maritime sabotage, mountain rescue, naval boarding, operation behind high risk enemy lines, special operations, special reconnaissance, tracking targets, underwater demolition, unconventional warfare, other missions in support of Portuguese and NATO armed forces. DAE's mission and training are similar to American special forces and it often trains with them.
Navy Expeditionary Combat Command (NECC) is an echelon III command of the United States Navy, which serves as the single functional command to centrally manage current and future readiness, resources, manning, training and equipping of the United States Navy's 21,000 expeditionary forces who are currently serving in every theater of operation. The NECC was established in January 2006. NECC is a subordinate command of the Navy's Fleet Forces Command.
Canadian Armed Forces (CAF) divers are specialists trained to conduct underwater operations within their respective environmental commands. Divers within the CAF are qualified into sub-categories of diving. Be it a member of a diving team or a CAF member who is maintaining currency and qualification through casual diving. Divers within the CAF are trained as Clearance Divers, Search and Rescue Technicians (SAR), Port Inspection Divers (PID), Ship's Team Divers, and Combat Divers.
The US employs divers in several branches of the armed forces, including the navy, army, marines, air force and coast guard.
The Operational Test and Evaluation Force (OPTEVFOR) is an independent and objective agency within the United States Navy for the operational testing and evaluation (OT&E) of naval aviation, surface warfare, submarine warfare, C4I, cryptologic, and space systems in support Navy and Department of Defense acquisition programs.
The Deployable Operations Group (DOG) was a United States Coast Guard command that provided properly equipped, trained and organized Deployable Specialized Forces (DSF), which still exist today, to the Coast Guard, United States Department of Homeland Security (DHS), United States Department of Defense (DoD) and inter-agency operational and tactical commanders. Formerly headquartered in Arlington, Virginia, it was established on 20 July 2007, and was commanded by a captain and was decommissioned by the Commandant of the Coast Guard, Admiral Robert Papp on 1 October 2013, although many of the units existed long before the 2007 commissioning. Upon decommissioning, the units previously assigned to the DOG were split between Coast Guard Pacific and Atlantic Area commands.
The Combat Divers Group, abbreviated to GRUMEC, is a special operations and Counterterrorism unit of the Brazilian Navy. Their main attributions include tasks such as reconnaissance, sabotage, hostage rescue and the elimination of targets of strategic value in maritime and riverine environments.
The United States Navy Center for Explosive Ordnance Disposal and Diving (CENEODDIVE) is one of the eleven learning centers responsible for training explosive ordnance disposal technicians and divers in the United States. CENEODDIVE is stationed on Naval Support Activity Panama City (NAS Panama City) in Florida and forms a part of the Naval Education and Training Command. With the exception of the Great Lakes learning site, CENEODDIVE is the only inter-service learning center.
Underwater Construction Teams (UCT) are the United States Navy Seabees' underwater construction units numbered 1 and 2 that were created in 1974. A team is composed of divers qualified in both underwater construction and underwater demolition. Possible tasks can be: battle damage repairs, structural inspections and assessments, demolition of waterline facilities or submerged obstructions, installation of submerged surveillance systems, or harbor and channel clearance. As needed, teams may test and or evaluate new or existing aquatic systems or equipment. Extending construction, whether vertical or horizontal, beyond the shoreline and waterline is their specialty. Reflecting Seabee tradition, teams are expected to execute underwater construction anywhere, anytime, under any conditions.
Portugal 
