[Snarf]

There were some S-boats and some older boats in the Atlantic patrolling against U-boats. There may have been a couple sinkings, but not much more.

To get the best results firing on multiple ships, always shoot at the farthest targets first, working to the nearest targets, that way you have as close to simultaneous impacts on all the targets as possible. Hitting ships in the next rows with any misses is quite wishful at best. Your best bet for accuracy is to get in really close, firing at less than 1000 yards, as this significantly increases your odds of hitting something. My preferred method is to sneak between the DD's under the layer, using hydrophones to track, then pop up inside the ring of DD's