Service
PACVs were first deployed in 1966 to Vietnam as part of the U.S. Navy's River Patrol Force (Task Force 116). Often called "Pac Vees", they were armed with a .50 caliber machine gun mounted on a rotational platform in the front, side mounted M60 machine guns, and often remote controlled M60s or grenade launchers in the stern. In addition, the crew, and often U.S. Army Green Berets and ARVN Rangers, riding on the side panels, employed assorted small arms such as M16 rifles, M79 grenade launchers, various other rifles, .45 pistols, M60s, and grenades. During PACV's first tour in Vietnam some basic light armor was added to the hovercraft to give it some protection from enemy fire. PACVs conducted many successful missions on the Mekong Delta, Cat Lo, Plain of Reeds out of Moc Hoa in their initial tour. The most successful operation was a wrongful incursion into Cambodia on November 20, 1966 that also involved insertion of South Vietnamese troops by helicopters and Mike Force Special Forces airboats manned by Chinese Nungs. 56 Vietnamese communist soldiers were killed to one Mike Force WIA. When it was discovered they were in Cambodia, not Vietnam, all units were withdrawn. The communist unit engaged had previously successfully engaged the airboats and Special Forces CIDG forces in South Vietnam on November 14, killing two Americans and wounding one.
The Navy withdrew the PACVs for overhaul in December 1966/January 1967 and redeployed them to Vietnam in late 1967. The U.S. Army created its own version of the PACV in 1967 with some of the Navy's modifications from the experimental phase of 1966, calling it the ACV, for air cushion vehicle. There were only three Navy PACVs, and three Army ACVs during the whole Vietnam War.
The PACV was too loud for patrol and interdiction missions on the coastline and waterways. However, after "Operation Quai Vat" (Vietnamese for "Monster", which was what the Viet Cong called the PACVs) the PACV showed great prowess and capability in marshy terrain like the Plain of Reeds along the south Vietnamese/Cambodian border.
In Operation Quai Vat in November 1966, the PACV force brought its speed and firepower to bear on the Viet Cong, with many successful attacks and raids, taking prisoners and destroying Viet Cong sanctuaries. Afterwards, the success of operation Quai Vat formed the basis for stationing the Army's ACVs in the Plain of Reeds. It was found that the PACVs could move faster over the slick ground found in southwestern Vietnam, and over the border into Cambodia. Though the loud noise of the PACVs was still an issue, their speed made up for it in this otherwise difficult terrain, especially during the monsoon season. The search and destroy raids conducted out of Moc Hoa in November 1966 caught the Viet Cong by surprise and resulted in many Viet Cong deaths. With time, and the degree of threat that this new fast and fierce weapon brought with it, the handful of PACVs and ACVs in Vietnam became major targets.
The Green Berets out of Moc Hoa became proponents of the PACVs, being involved in many of their early operations.
Read more about this topic: Patrol Air Cushion Vehicle
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