Strategic problems in a Porpoise sub...

[M. Sarsfield]

I did an end around on a small convoy with 2 escorts the other night. When I got a large freighter in visual range (way out there almost over the horizon) I made a best guess at the angle on the bow and resulting heading - sometimes you have to dive a few times to get new sound bearings to determine this. I matched their course and traveled at flank speed to get in front of them. When I could no longer see the merchant, I cut in 90 degrees toward their projected path and submerged once I felt that I was within 2000 yards of the path.

The ships ended up changing course from a SW heading to a SE heading, but I was about due south of their position when they did the course change. I only had to make some minor course and speed changes to compensate and I lined up three fish on the large merchant. One was a dud and 2 went under her, but I was happy with the way I positioned myself and ran the calculations.