United States Naval Construction Battalions, better known as the Navy Seabees, form the U.S. Naval Construction Forces (NCF). The Seabee nickname is a heterograph of the initial letters "CB" from the words "Construction Battalion". Depending upon context, "Seabee" can refer to all enlisted personnel in the USN's occupational field 7 (OF-7), all personnel in the Naval Construction Force (NCF), or Construction Battalion. Seabees serve both in and outside the NCF. During World War II they were plank-holders of both the Naval Combat Demolition Units and the Underwater Demolition Teams (UDTs). The men in the NCF considered these units to be "Seabee". In addition, Seabees served as elements of Cubs, Lions, Acorns and the United States Marine Corps. They also provided the manpower for the top secret CWS Flame Tank Group. Today the Seabees have many special task assignments starting with Camp David and the Naval Support Unit at the Department of State. Seabees serve under both Commanders of the Naval Surface Forces Atlantic/Pacific fleets as well as on many base Public Works and USN diving commands.
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.
The Underwater Demolition Team (UDT), or frogmen, were amphibious units created by the United States Navy during World War II with specialized missions. They were predecessors of the Navy's current SEAL teams.
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.
Underwater demolition is the deliberate destruction or neutralization of man-made or natural underwater obstacles, both for military and civilian purposes.
A United States Navy diver may be a restricted fleet line officer, Civil Engineer Corps (CEC) officer, Medical Corps officer, an Unrestricted Line Officer who is qualified in Explosive Ordnance Disposal (EOD) Warfare (1140) 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.
The Civil Engineer Corps (CEC) is a staff corps of the United States Navy. CEC officers are professional engineers and architects, acquisitions specialists, and Seabee Combat Warfare Officers who qualify within Seabee units. They are responsible for executing and managing the planning, design, acquisition, construction, operation, and maintenance of the Navy's shore facilities. The Civil Engineer Corps is under the command of the Chief of Civil Engineers and Commander, Naval Facilities Engineering Systems Command. On 12 August 2022, RADM Dean VanderLey relieved RADM John W. Korka, becoming the 46th commander of NAVFAC and Chief of Civil Engineers.
When World War II broke out the United States Naval Construction Battalions (Seabees) did not exist. The logistics of a two theater war were daunting to conceive. Rear Admiral Moreell completely understood the issues. What needed to be done was build staging bases to take the war to the enemy, across both oceans, and create the construction force to do the work. Naval Construction Battalions were first conceived at Bureau of Yards and Docks (BuDocks) in the 1930s. The onset of hostilities clarified to Radm. Moreell the need for developing advance bases to project American power. The solution: tap the vast pool of skilled labor in the U.S. Put it in uniform to build anything, anywhere under any conditions and get the Marine Corps to train it. The first volunteers came skilled. To obtain these tradesmen, military age was waived to age 50. It was later found that several past 60 had managed to get in. Men were given advanced rank/pay based upon experience making the Seabees the highest paid group in the U.S. military. The first 60 battalions had an average age of 37.
The US employs divers in several branches of the armed forces, including the navy, army, marines, air force and coast guard.
Naval Mobile Construction Battalion 4 is a Navy Seabee battalion homeported at Port Hueneme, California. Nicknamed the "Pioneers", it is the first of the many CBs created after the original three. The battalion's current insignia first appeared on its 1953–55 cruisebook.
Naval Mobile Construction Battalion 1, is a United States Navy Seabee battalion. NMCB ONE, the original "Pioneers", has a long, proud and distinguished history as the very first Naval Construction Battalion of the service that would become known as the Seabees.
Amphibious Construction Battalion TWO was an amphibious construction battalion in the United States Navy based in Little Creek, Virginia. ACB 2 was decommissioned on 31 March 2023.
Naval Mobile Construction Battalion FORTY, nicknamed Fighting FORTY, was a US Navy Seabee Battalion based out of Port Hueneme, California. Its primary mission was wartime contingency construction as well as peacetime construction and disaster relief.
Naval Mobile Construction Battalion 133 is a United States Navy Construction Battalion, otherwise known as a Seabee battalion, homeported at the Naval Construction Battalion Center. The unit was formed during WWII as the 133rd Naval Construction Battalion. It saw action and was decommissioned shortly after the war ended. The unit was reactivated as Mobile Construction Battalion 133 for the Vietnam War and remains an active unit today.
Naval Mobile Construction Battalion SEVEN (NMCB 7) was a Navy Seabee battalion last homeported at Naval Construction Battalion Center, Gulfport Mississippi. Nicknamed the "Magnificent Seven", it is one of the first ten Naval Construction Battalions formed by the U.S. Navy in 1942.
Army engineer divers are members of national armies who are trained to undertake tasks underwater, including reconnaissance, demolition, and salvage. These divers have similar skills and qualifications as professional divers. Army divers use both surface supplied "Hard hat" and SCUBA to perform their missions. In the United States Army, they are members of the Corps of Engineers. In the British Army, they may be Royal Engineer Divers or Commando Engineer Divers.
Construction Battalion Maintenance Unit THREE ZERO TWO (CBMU-302) of the U.S. Navy was commissioned on 31 March 1967. Along with a sister unit, CBMU-301, was also commissioned. They were the first CBMUs commissioned since the two that came and went with the Korean War. The official commissioning ceremony of CBMU-301 and CBMU-302 was held at the U.S. Naval Construction Battalion Center, Port Hueneme, CA on 7 April 1967. LT Mel Harper was the first Commanding Officer.
Naval Mobile Construction Battalion 11 is a United States Navy Construction Battalion, otherwise known as a Seabee Battalion, presently home-ported at the Naval Construction Battalion Center. The unit was formed during World War II as the 11th Naval Construction Battalion at Camp Allen on 28 June 1942. On 1 July, she moved to the new Seabee base Camp Bradford. Seabee battalions were numbered sequentially in the order they were stood up. The battalion lost one man during the war to a construction accident. The 11th CB was inactivated on 1 December 1945, at Subic Bay, Philippines.
Naval Construction Battalion 5 was commissioned on May 25, 1942 at Camp Allen Va. The battalion went to Port Hueneme and shipped out for the first of two deployments in the Pacific. When the war ended CB 5 was decommissioned in the Philippines. On July 10, 1951 the Battalion was re-commissioned as a MCB and remains an active unit today.
