I use the Fixed Wire method. Fixed Wire makes range irrelevant.
1) Direct submarine course just in front of target ship. Set scope to 000.
2) When target ship bow crosses vertical reticule, start stopwatch. When target ship stern crosses vertical reticule, stop stopwatch.
3) Identify target ship in recognition manual to determine ship length.
4) Determine target speed by using the formula:
(target length in meters * 1.94) / time in seconds
5) Direct submarine to course 90 degrees to target ship track.
6) Go to TDC. Turn on manual data entry. Set AoB to 90 degrees port or bow, depending on what side of the target you are. Set speed per step 4. Turn off TDC.
7) Go to scope. Set scope to 000 gyroangle.
8) Go back to TDC. Turn on manual data entry. Tweak AoB back to 90. Turn off TDC.
Repeat steps 7 & 8 until scope is on 000 gyro angle and AoB is on 90.
9) Open outer door(s). As target ship crosses vertical reticule, fire torpedo(es).
Steve
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