Command and Communications Boat:
To allow vital command and communications with the rest of the flotilla, an information boat was needed and, thusly, the “Command and Communications Boat” (CCB) was devised. The MRF was designed to support an army infantry brigade and an artillery battalion from the 9th Army Infantry Division.
Patrol Craft Fast Swift Boats:
Patrol Craft Fast (PCF), also known as Swift Boats, were all-aluminum, 50-foot (15 m) long, shallow-draft vessels operated by the United States Navy, initially to patrol the coastal areas and later for work in the interior waterways as part of the brown-water navy to interdict Vietcong movement of arms and munitions, transport South Vietnamese forces and insert SEAL teams for counterinsurgency (COIN) operations during the Vietnam War.