German subs were smaller than US submarines, being about 220 feet long, with a complement of about 45 crewmen; while the US Gato class sub was 311 feet long with about 75 officers and men.US subs...
It depends of the size of the boat. A guy with a 15 foot skiff with an outboard could be a commercial fishing boat is he is engaged in commercial fishing. On the other end there are very large...