Dee ihe ga-aga n'ihu na paragraf a - Huckins meriri nkwekọrịta imewe ya na 1941, mgbe ndị agha ụgbọ mmiri dị njikere iwepu mmemme PT, wee nye ikikere iji Quadraconic hull na PT ụgbọ mmiri. Ha nyekwara ikike maka Elco, Higgins na Philadelphia Navy Yard iji mee ihe ha patented laminated keel, nke na-abawanye ike hull. E nyere ngụkọta nke ụgbọ mmiri 18 dị mita 24 maka ndị agha mmiri nke 14 na nke 26 ná mmalite 1943. E kenyere ha ọrụ n'ebe dị iche iche n'Oké Osimiri Panama
, Miami, Florida, Hawaiian Sea Frontier na Pearl Harbor, na Central Pacific, na ebe a na-azụ ọzụzụ na Melville, Rhode Island.