Corrected entry: The Royal Navy named ships in line with the class of vessel that was being named. Compass Rose was a Flower class corvette, so should be named after a flower. At the time 'compass rose' didn't refer to a flower, but only to the pattern of directions shown on a map or compass, so the name would be inappropriate. 'Compass Rose' is now a recognised breed of rose, but it was only introduced in the mid 1990s.
Other mistake: One of the depth charges used to try and sink a German submarine is clearly marked "inert filling" so it would not explode.
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