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
490pcf
As of July 2014, the market cap for Putnam High Income Bond Fund (PCF) is $148,319,683.20.
pounds per cubic foot
Do you mean PCV ? - ( Positive Crankcase Ventilation ) valve
3 nights of nightmares in a place called France
Pressuron theory (2013) by Olivier Minazzoli and Aurélien Hees
pcf stands for Pounds per Cubic Feet. Therefore it is a measure of density.
1 kg/cubic metre = 77.853 pounds/ cubic foot.
2.2 per cubic foot = 2.2 x 0.0283168466 per cubic meter
[diameter]^2 / 162 kg 1.580 kg / meter