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All I know is that they were based at Horning. There is an image of a compass boat on the Broadland Memories website.
Craigs database has 5 Compass Girls listed if you scroll through the pages. Click on the registration number for more details. http://www.broads.org.uk/wiki/index.php5?title=Boats_matching_search&RegNo=&bname=compass&aand=EQ&tand=CO&quicksearch=