with SERT's were decommissioned. Today, UCTs performance demonstrate the SERT concept for NECC. Seabees outside the NCF Amphibious Construction Battalions (PHIBCBs) ACBs (or PHIBCB) were preceded by the pontoon assembly CBs formed during World War II. On 31 October 1950, MCBs 104 and 105 were re-designated ACB 1 and ACB 2, and assigned to Naval Beach Groups. ACBs report to surface TYCOMs. Additionally, in an ACB half the enlisted are a construction rate while the other half are fleet. Construction Battalion Maintenance Units When during World War II these units had 1/4 the personnel of a CB. Their task was to assume maintenance of bases once CBs had completed construction. Today, CBMU's provide public works support at Naval Support Activities, Forward Operating Bases, and Fleet Hospital/Expeditionary Medical Facilities during wartime or contingency operations for a Marine Expeditionary Force (MEF), Marine Expeditionary Group (MEG), or NSW. They also provide disaster recovery support to Naval Regional Commanders in CONUS. CBMU 202 Naval Base Little Creek, VA det Jacksonville CBMU 303 Navy Expeditionary Combat Force, Naval Base San Diego, Ca. det Port Hueneme det Pearl Harbor NAVFAC Engineering & Expeditionary Warfare Center Ocean Facilities Department. Gives support to the Fleet through the support of Underwater Construction Teams. UCTs deploy worldwide to conduct underwater construction, inspection, repair, and underwater demolition. Underwater Construction Teams (UCT) UCTs deploy worldwide tasked with underwater construction, inspections, repairs, and demolition operations. They can support a Fleet Marine Force amphibious operation or provide combat service support ashore. UCT1 is home ported at Little Creek, Virginia, while UCT2 is at Port Hueneme, California. After basic UCT training a diver is qualified as a 2nd Class Diver. Training is 26 weeks at the Dive school at Panama City, Florida. It includes a tactical training phase for advanced combat and demolitions skills. The training qualifies divers as Underwater Construction Technicians skilled in: seafloor excavation, hydrographic surveys, search and recovery, engineering reconnaissance, and precision demolitions. Senior NCOs are schooled for their supervisory positions whether construction or demolition. UCT divers can apply for selection to support the Naval Special Warfare Development Group. Public Works: U.S. Naval Bases These units have CEC officers leading them and enlisted Seabees for the various crews. About one-third of new Seabees are assigned to Public Works Departments (PWD) at naval installations both within the United States and overseas. While stationed at a Public Works Department, a Seabee can get specialized