Avoid the planes. Attack only submerged, even the lonely merchants, or try hitting them first with the dack gun, but only from great distances. In the case of convoys, avoid being detected by the escorts. Try to position yourself between the columns if possible, and launch bow and stern torpedos at the same time, against 3 merchants, at least cripple their engines. Then..dive. Dive deep...I allways go 200, 220 metres (if my hull is intact) and silent. Pray. Use your
