These typically involve the use of closed circuit dive equipment to infiltrate a beach landing site (BLS) undetected.
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.
[3] The Lambertsen Amphibious Respiratory Unit (LARU) was the first closed-circuit re-breather adopted by the US Military and used in Combat Operations with the OSS MU.
[5] With a cadre of instructors primarily made up of Army Special Forces, along with a smaller number of Army Rangers, Navy SEALs, and Air Force pararescuemen and combat controllers, CDQC was formerly a standard part of the Air Force pararescue and combat control training pipelines (prior to the opening of the USAF Combat Diver Course in Panama City, FL), and both Tactical Air Control Party and Special Reconnaissance (formerly Special Operations Weather Teams) have also attended CDQC to become qualified in special warfare maritime operations.