Unfortunately there's no one of that name in the old membership list for the CFVA, which might have provided a head start on the boats he was on. If he was in Africa (West or East) then it would have been on MLs or HDMLs, with the main base of operations in West Africa being Freetown, Sierra Leone, for convoy protection duties. Great Yarmouth (HMS Midge) could conceivably have been 'Dog' Boats. If you don't have any information on him, then you might want to try and get hold of his service record from the Royal Navy Disclosure Cell
which would give you the ships or bases he was at and the timeframes, and may give you individual boat numbers too.