United States Nasty-class patrol boat

The Nasty class of fast patrol boats were a set of 20 vessels built for the United States Navy to a Norwegian design and purchased in the 1960s for covert operations during the Vietnam War.Following World War II the US Navy had little use for fast attack craft, and most of her PT boats were disposed of shortly after VJ Day.With the involvement in the Vietnam War the Navy saw a renewed need for small combatant craft for "brown water" operations, and they approached the Norwegian Westermoen company, which had built a prototype fast attack boat, the Nasty, and was currently building a set of 12 vessels (the Tjeld-class patrol boats) for the Royal Norwegian Navy.With the end of the conflict the need for these boats evaporated, and the high maintenance costs of such vessels militated against retaining them.Most were disposed of in the 1970s and all were gone by 1981, except for PTF 17, which is on display at the Buffalo and Erie County Naval & Military Park.
Two Nasty-class boats conduct high-speed trials in May 1963
Nasty-class patrol boats operated by MACV-SOG Detachment 2 return from the DMZ , 1971
Nasty-class PTF-6 at naval amphibious base, Little Creek, Virginia, December 1973
PTF-3 Nasty Class Patrol Boat in Deland, Florida undergoing restoration.
PTF-17 in modern times at the Buffalo Naval Park.
The Bofors 40 mm Anti-Aircraft Gun mounted on PTF-17 at the Buffalo Naval Park
This is a close up photo of some faded paint reading PTF-10.  This Nasty Class patrol boat was on blocks in a boat yard in Virginia.
Nasty-type patrol boatWestermoen BåtbyggeriMandal, NorwayJohn Trumpy & SonsAnnapolis, MarylandUnited States NavyPatrol boatlong tonsNapier DelticBofors 40 mm gunpatrol boatsNorwegian designcovert operationsVietnam WarWorld War IIfast attack craftPT boatsVJ Daybrown waterWestermoenTjeld-classRoyal Norwegian NavyTrumpyAnnapolisMACV-SOG Detachment 2Bofors 40 mmspecial forcesNorth VietnamSouth Vietnamese NavyBuffalo and Erie County Naval & Military ParkDeLand, FloridaWorld_History_GroupHNoMS NastyTjeld classNasty classTjeld typeNasty typePTF boatPTF-26US Navy SealsMobile Riverine ForceNaval Amphibious Base CoronadoUS MarinesBåtbyggeriSewart SeacraftBath Iron WorksOsprey classGulf of Tonkin incidentOperation 34ASpecial warfare combatant-craft crewmenCIA activities in VietnamPatrol Craft FastTjeld-class patrol boatStorm-class patrol boatHNoMS NastyJaguar-class fast attack craftChilean torpedo boat QuidoraVikings in VietnamOut Over Blue WaterMen in Green FacesDeLand Naval Air Station Museum20-millimeter (0.79 in) cannon81 mm mortarM2 BrowningNapier Deltic Diesel l8CDetroit Diesel 16V71ArticlePT boatUS patrol vessels