Armored Troop Carriers (ATCs or "Tangos"), 10 Monitors with 40mm cannon and 81mm mortar, 32 Assault Support Patrol Boats (ASPBs), 5 Monitors to serve as command and control boats and 2 LCM-6's to serve as refuelers. A salvage force would include: 2 2,000-ton heavy lift craft, 2 YTB's for salvage, 2 LCU's (landing craft, utility), and 3 100-ton floating dry docks. Navy Assault Squadrons Originally two, and ultimately four Navy Assault Squadrons were created: River Assault Squadrons 9, 11, 13 and 15. The 2nd (Riverine) Brigade of the U.S. 9th Infantry Division was assigned to work with these units. A fixed land base was created by dredging a portion of the Song Ham Luong near My Tho and was named "Đồng Tâm." This became the administrative headquarters of the MRF. Nonetheless, the Navy created a floating Mobile Riverine Base (MRB) by assigning barracks ships, and barrage barges (non-self propelled) to house both Army and Navy personnel, provide communications and staff support, mooring and support facilities on Ammi pontoons alongside, and refit, rearm and resupply stores. The MRB also included repair ships (ARLs) and supply ships (LSTs). The ships of the MRB also had helicopter landing capabilities, providing air resupply and medical air evacuation ("dust off") capability and had significant medical care facilities aboard. Thus, the entire force could move throughout the major rivers of the Delta, and launch troops, on boats, into assault operations deep into the narrowest rivulets and canals. Given the low limit speed of perhaps 6 knots (or less if opposing the fierce lower Delta currents), this "MOBILE" capability made boat assault operations in the furthest reaches of the Delta feasible. Eventually, the MRF included Army floating artillery and mortar barges, which could be moved throughout the Delta and positioned to support the planned area of each assault operation. Integral air support came from newly created Navy gunship helicopter squadron HAL 3 (Helicopter Attack, Light), the SEAWOLVES, based at Dong Tam a unit of CTF 116. This was additional to such air support, both troop insertion and gunfire ships, as the Army tasked to each operation, and air support from Air Force TAC air units on call. See also Dinassaut Khmer National Navy Republic of Vietnam Navy Royal Lao Navy References Further reading Cutler, Thomas J. "Brown Water, Black Berets", Coastal and Riverine Warfare in Vietnam. Published by United States Naval Institute. , . Friedman, Norman. U.S.