PT-486 History

80′ Elco Motor Torpedo Boat:

  • Laid down 27 July 1943 by the Electric Boat Co., Elco Works, Bayonne, NJ
  • Launched 16 October 1943
  • Completed 25 November 1943
  • Placed in service 2 December 1943 and assigned to Motor Torpedo Boat Squadron FOUR (PTRon 4) under the command of Lt. Comdr. Francis D. Tappaan, USNR
  • PTRon 4 was the training squadron, based at the MTB Squadrons Training Center, Melville, R.I. It was the largest squadron, having a peak of 28 boats in service at one time. When the training center was decommissioned early in1946, PTRon 4 was assigned to the Operational Development Force, and based at Solomons, Md. It was the last squadron to be decommissioned, and its boats, PT’s 613, 616, 619, and 620, which remained in service under the Operational Development Force, were the last World War II PT’s in service in the Navy
  • Placed out of service 6 January 1946
  • Reclassified as a Small Boat, C105335, 27 August 1946
  • Acquired in 1954 by Captain Otto F. Stocker of Ottens Harbor, Wildwood, NJOttens Harbor, Wildwood, NJ and named Sightseer
  • Before being acquired by Fleet Obsolete, she was being restored as PT-109



  • Displacement 56 t.
  • Length 80′
  • Beam 20′ 8″
  • Draft 5′
  • Speed 41 kts.
  • Complement 17
  • Armament: One 40mm mount, four 21″ Torpedoes and two twin .50 cal. machine guns
  • Propulsion: Three 1,500shp Packard W-14 M2500 gasoline engines, three shaftsEngines were changed to two General Motors 6-71 diesels and one Superior diesel engine. Changed again to two Detroit Diesel (General Motors) 871N diesels and finally replaced by two General Motors V12-71 diesels.

From NavSource Online