May 1943 Submarine Warfare Summary
Another lean month for the Silent Service with barely 100,000 tons of enemy shipping damaged or sunk. There has been a marked increase in aerial ASW patrols off the Timor and Ambon areas of operation and also around the entrances to the Sea of Japan. Several new convoy routes have been discovered but targets have run dry in the previous happy hunting grounds in the approaches to Tokyo. The aim for June 1943 is to seek and destroy his tankers and oilers. If I can stop or hinder the flow of fuel his heavy and carrier units lose some of their mobility. Somewhat unlucky in that there has been a large percentage of dud hits this month. Top scorer is the SS Cisco with 22,500 tons spread over 4 ships. 4 boats were also lost the American Seawolf and Grampus and the Dutch KX and KIX. God speed brave mariners.