Crebin, Edward Horace. "The 'Porcupine'."

The PORCUPINE, a British "old-fashioned whaler," is transformed into a Q-Ship (she is made to look like a cluttered tramp coaster; under her false "skin," though, she is heavily armed) and successfully takes on a German U-boat which, after becoming disabled, had foolishly attempted to effect repairs in a deserted North Seas inlet. The encounter proves fatal to both vessels. Like several other stories by Crebbin, this one appears to have first reached print in 1942 and is thus cataloged as one of the author's World War 2 tales.