Never both with them myself unless they are really in the way. I shot one up with the deck gun one patrol to see what it would take to sink it. Too much time too much ammo not enough renown. Never waste a torp on anything smaller than a DE.

My Analysis

Fishing Boats: Since these are not commercial fishing vessels, their contribution to the British economy is extremely negligible. These are just local fishermen trying to make a living. Thus they are in no way involved in the war effort. Therefore, they should NOT be targeted.

Small Coastal Vessels: Even as small cargo vessels they contribute in one way or another to the war effort. Therefore, they should be considered LOW-PRIORITY TARGETS.

Tug Boats: Their only contribution to the war effort is towing damaged ships to the safety of ports, which is barely an indirect contribution. Therefore, they should NOT be targeted.

Trawlers: Since these are commercial fishing vessels, they are able to contribute in a noticeable way to the economy, and thus to the war effort. Therefore, they should be considered LOW-PRIORITY TARGETS.

I grow weary of the inaccuracy of these claims. The figures are 1244 rounds, 3.8 years and 25 patrols. It will then take another decade to sink. You should get your tonnage credit by 1957.

In seriousness, according to U-boat.net, those losses mentioned are the only cases where civilian vessels under 1000 tonnes were attacked. That hardly makes for historical accuracy. Save the ordnance for the big ships.