Princes Park...I remember it well. U-117 suffered a major daylight attack there from the local geese squadron, they hate U-boats with a passion! Revenge was swift though...after some running repairs during the week, U-117 was patrolling the outer margins of the moored up paddle boat things when a lone goose without an escort came into view. A full salvo of torpedoes was fired, resulting in one very surprised goose and one lost torpedo. I never did find that one, but the goose did take off with a very pronounced list to starboard...
Rich