1. Ask your watch officer when he is on the bridge, he'll be perfectly capable to provide you with a bearing and range.
2. Yes, that means the torpedos do not turn and then range becomes irrelevant for aiming. You do need to have the right AOB and speed input though. Then just aim the periscope to a direction that makes the gyroangle 0. Then wait to fire until the juicy ship part passes the line. (no lock, and don't forget to open the tubes beforehand)
3. Yes, this circle:
is the speed with which you wil do the intercept. It should be as quick as possible, or whatever the weather allows.
See, no need to feel embaressed. You allready knew 2 out of 3.
