A patrol torpedo (PT) boat of the same class as John F. Kennedy's PT-109 is shown with a single torpedo-launching tube outlined. A single tube, with torpedo nearby, is nearly all that is visible at the newly discovered PT-109 wreck site.
With crews of 12 to 14, the "mosquito boats" in the Solomon Islands nimbly harassed Japanese warships, usually under cover of darkness. The PT crews' primary goal in the Solomons was to hinder delivery of troops and supplies to Japanese bases.
Photograph courtesy WW II PT Boats, Bases, and Tenders Museum and Library, Germantown, Tennessee