[derstosstrupp]

You can zoom out on the map. Click to place the ruler where you want, mouse wheel out. WASD to move.

The speed timing doesn’t need to be for 5 minutes. Minute or 2 is probably fine. An easy way to get speed also is to point your bow in front of the target, your scope to 0 bearing and wait til his bow crosses the wire, starting the stopwatch. When the stern crosses, stop the time. Take target length / seconds * 1.94 for his speed.

Attack disc is accurate. You just need to learn it. Check my channel for the slide rule series.

These things have a steep learning curve requiring patience. My “chatty” video is long but it covers EXACTLY what to do to sink a ship. Granted it’s without map contacts which it sounds like you are using to learn and that’s fine. That just makes it that much easier for you.

Maybe at this point be less concerned about targeting methods and more about getting comfortable with the interface. Then return to targeting. One step at a time. I for example use a pretty standard TWOS setup so what you see on my screen should align with what you see.

I might also point you to the how-to thread in the SH5 area - have you used that?