[maillemaker]

You may wish to employ a "dry run" to obtain Target Speed, using the Splitlog Formula.
An AOB of 90 degrees to the target is best, but NOT required.
If your close to disecting the targets track at 90 degrees, you don't have to stop either.

Identify your target.

Get in your best "guesstimated" position to disect the targets track, at 90 degrees.

OK, first question:

I always approach ships being well in front of them, and I point my sub 90 degrees TO THEIR TRACK. This is NOT, as I understand it, the same thing as having an Angle on the Bow of 90 degrees.

Angle on the Bow, as I understand it, is the angle from the target ship (not their heading) to my sub.

So if my sub is 90 degrees to the target ship's HEADING, but they are a zillion miles away, the angle on the bow will be quite small, approaching zero the farther away they are. Angle on the Bow will not equal 90 degrees until they are directly in front of my sub, and then, of course, it's too late to be shooting torpedoes.

Is this correct?

The way I understand it, I want to position my sub 90 degrees TO THE TARGET SHIP'S HEADING.

I then calculate the angle on the bow quite precisely using the protractor tool on the map, picking a point directly in front of the target ship, then ON the target ship, then ON my sub. This give me the angle between the target ship's nose and my sub. This should be the AOB, right?

This part I have down.

When the targets bow reaches the 000 mark, start the Stop Watch.

When the targets stern reaches 000, stop the Stop Watch.
(The same Stop Watch that times your torpedoes).
That number will remain on the watch, until you remove it, or fire a torpedo.

So basically you are saying let the ship pass directly in front of my sub (bearing 000)???? Don't you then miss the shot? Or do I then, now having the speed, have to go race in front of them again for a shot?

And turn your periscope so that the gyroangle points to a straight run.

I don't understand what this means or how to do it. Please explain?

Also, is the namometer or whatever it is (the markings on the right side of the map) useful for calculating speed?

Steve