Possibly US Sailors that served in the Brown Water Navy (US Navy Riverine Forces) in Vietnam. Swift Boats (PCF-Patrol Craft Fast) were only one of several riverine boats in the war: PBR's (Patrol Boat River-built of fiberglass, jet water powered/seen in the film "Apocalypse Now"); Monitors (converted WW2 Landing Craft, made of steel, and armed with either a 40mm or 105mm cannon in a forward turret-river battleships); Alpha Boats (ASPB-Assault Support Patrol Boat) built of steel, and used for mine sweeping the rivers; Swift Boats (PCF's) were all aluminum built, 5 crewmen and one officer in charge, fifty foot long-Senator Kerry was a commander on a PCF.
The northern most river in former S. Vietnam, just below the DMZ was the Cua Viet; it ran into the Tonkin Gulf. Pretty rough entrance, at least one US Navy Swift Boat (PCF) was sunk trying to enter it from the sea.
Da Nang and Cam Ranh Bay were two of the main USN bases. However, the USNs riverine forces, primarily the Swift Boats (PCF-Patrol Craft Fast) operated as far north as the DMZ at the Cua Viet River in I Corps.
June 1968, (Near midnight hours)-US Navy Patrol Craft Fast #19 (Swift Boat) radioed it was under attack by hovering aircraft near the DMZ (17th Parallel). PCF 19 exchanged .50 caliber machinegun fire with the hovering aircraft during the running gun battle for several minutes, before exploding and disappearing beneath the sea. Swift Boat 12 (PCF-12), the US Cruiser USS Boston and Australian Destroyer HMAS Hobart responded. Five of the Swift Boat 19 crewmen were dead, the commanding officer was wounded. One of the five crewmen's body was never recovered. US Jets responded to the firefight and accidently attacked the USS Boston & HMAS Hobart, killing two Australian Sailors. During the PCF-19 firefight, all US/Allied helicopters reported themselves to be out of the area. To date, other than fratricide, the US Navy will not state the reason(s) for Swift Boat 19's loss. 26 December 1972-North Vietnamese MIG-21 pilot Major Pham Tuan reported shooting down a B-52 Stratofortress Bomber over North Vietnam, using air to air missiles. The shoot down is the only known loss of a B-52 to a MIG Jet Fighter. The US Air Force states that the downed B-52 was lost to a SAM (surface to air missile). On 23 July 1980, Lt. General Tuan became Vietnam's First Cosmonaut, when he and Soviet Cosmonaut Viktor Gorbatko were launched into outer space from the Baikonur Cosmodrome.
North Vietnamese shore batteries often duelled with US Navy warships that were working the gunline (shore bombardments). North Viet Navy torpedo parts attacked US Warships in the Tonkin Gulf. North Viet Air Force MiG17 jets attacked the US destroyer USS Higbee and cruiser USS Oklahoma City in 1972. North Viet Air Force helicopters attacked and sunk a US Navy Swift Boat (PCF-19) in 1968.
Weight of Water is 63 PCF Actually, the unit weight of water is 62.4 pcf.
pcf
To convert 2.2 pounds per cubic foot (pcf) to metric units, you can use the conversion factor 1 pcf is approximately 16.0185 kilograms per cubic meter (kg/m³). Therefore, 2.2 pcf is approximately 35.2447 kg/m³ in metric units.
As of July 2014, the market cap for Putnam High Income Bond Fund (PCF) is $148,319,683.20.
The typical unit weight of rebar is about 490 pounds per cubic foot (pcf). This value may vary slightly depending on the specific type and size of the rebar being used, but 490 pcf is a commonly used estimate.
pounds per cubic foot
Do you mean PCV ? - ( Positive Crankcase Ventilation ) valve
3 nights of nightmares in a place called France
[diameter]^2 / 162 kg 1.580 kg / meter
1 kg/cubic metre = 77.853 pounds/ cubic foot.
pcf stands for Pounds per Cubic Feet. Therefore it is a measure of density.
There were about 80 PCF (Patrol Craft Fast) Swift Boats in South Vietnam. Others were given (or sold) to Thailand, Philippines, and Malta in the Mediterranean Sea. Swift boat #45 (PCF-45) was turned over to the South Viet Navy in about January 1971 & redesignated PCF-3925.. Swifts operated in the ocean until about 1969, then they began operating in South Vietnam's inland waterways as part of the US Navy's "Riverine Forces." All were part of the USN's Brown Water Navy.