Have you tried this for a simple way in to manual TDC?
Position yourself 90 degrees to the target.
Draw a line from the target past your sub.
This is the targets course.
Take the protractor from the centre of your sub and draw it out 70 degrees on to the targets course line.
Take the ruler and from the centre of your sub place it on top of the protractor on the targets course line.
Look at the subs compass (or place on the lines) where these 2 lines pass through it and this will give you the periscope bearing.
If you have already done the 3 minute targets speed.
You now have.
Speed
AOB
Range
Bearing to target.
Enter the data in the TDC
Identify the target and send the mast height to the TDC.
Lock the periscope on the bearing you have.
With SH4 as soon as the target is on the periscope bearing press the PK.
With SH5 I have’nt played for a few weeks make sure the target is locked and you should have a 70 to 90 degree firing angle.
If the target changes position it is easy to adjust the lines as these will normally be minimal changes.
Stadimeter does not need to be used.
Check the periscope bearing again.
There maybe some slight differences in the order between SH4 - SH5 but you should get what I am trying to say.
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