Hi Cap.
I'm irresistably attracted by a topic called ''Bilge'' (ie rubbish)
Now expelling detris from the Bilges was claimed to be a ruse emplyed by pinned WW2 sub captains
in the hope of fooling the surf who had depth-charged 'em. that he'd made a kill.
Perhaps others may confirm whether this is true - I supect not because it would be very tempting
to drop another couple of hedgehogs - just to make sure. Confirms to the surf he's got you cold ?