The part I didn't advertise is that I went through a LOT of shells. I fired off a few rounds with only a couple of hits; then I retired to the bridge to let the gun crew handle it. They fired for some time before it occurred to me to tell 'em to aim for the hull. When I did, they fired round after round into her upper works.
When I got a bit closer to the target, I told them to aim for waterline, and the target was sunk in short order. It didn't help that I was zig-zagging to avoid return fire. There is definitely a learning curve to this sim!
Ron