▁were ▁built ▁to ▁res emble ▁small ▁merchant ▁vessels ▁for ▁use ▁as ▁de co y ▁( Q ) ▁ships , ▁and ▁were ▁altern atively ▁known ▁as ▁" P Q " ▁boats . ▁Again , ▁none ▁were ▁named , ▁although ▁in ▁ 1 9 2 5 ▁PC . 7 3 ▁was ▁given ▁the ▁name ▁D art , ▁while ▁PC . 5 5 ▁and ▁PC . 6 9 ▁were ▁named ▁Bal uch i ▁and ▁Path an ▁respectively ▁upon ▁transfer ▁to ▁the ▁Royal ▁Indian ▁Navy ▁in ▁May ▁ 1 9 2 2 . ▁ ▁The ▁PC - class ▁slo ops ▁were ▁completed ▁with ▁slight ▁en larg ement ▁from ▁the ▁standard ▁P - class ▁slo ops . ▁They ▁were ▁ 2 4 7   ft ▁( over all ) ▁long ▁and ▁ 2 5 ½ ▁ft ▁in ▁bread th , ▁although ▁they ▁had ▁similar ▁mach in ery . ▁Dis p lacement ▁varied ▁from ▁ 6 8 2 ▁tons ▁in ▁PC . 4 2 , ▁PC . 4 3 , ▁PC . 4 4 , ▁PC . 5 1 , ▁PC . 5 5 ▁and ▁PC . 5 6 ▁ ▁to ▁ 6 9 4 ▁tons ▁in ▁PC . 6 0 ▁to ▁PC . 6 3 ▁and ▁in ▁PC . 6 5 ▁to ▁PC . 7 4 . ▁They ▁carried ▁one ▁ 4 - inch ▁and ▁two ▁ 1 2 - p ound er ▁guns , ▁and ▁no ▁tor ped o ▁tub es . ▁ ▁Sh ips ▁ ▁References ▁▁ ▁D itt mar , ▁F . ▁J . ▁and