Ive seen this a lot and done it on purpose
in shIII and shIV
did you put your scope up?
when I do it on purpose on run close alongside an
escort and put up the scope to get his mates to start
firing at my scope. with the nearby escort behind my
scope he inevitebly will take a hit and the game is afoot
he will run up colours and treat the offender as a renegade.
any of the other escorts will pick a side based on the price of
saurkraut in tai pei.

meh! it works for me especially if im short on torpedo's.
A fine and Thoroughly damned unenglish way of running up the score.