This is what I do and most of the time it works:
1. ID the target and lock your scope on it.
2. Get distance/bearing using the stadimeter and put it into TDC.
3. Wait for the target to traverse about 5-10 degrees or more (you can lower your scope and follow with sonar). You can prep your fish or whatever during this time.
4. Take another distance/bearing using the stadimeter and put it into TDC.
5. Go to the speed part and click the watch icon and enter it into the TDC (this will display the speed and the
heading of the target in the message area).
6. Go to the AOB section. Using the heading (the heading is on the TDC, not on the device where you enter the information) from the previous step or eyeballing it, enter the AOB and send to TDC. You may need to fiddle with this a bit.
7. TURN ON THE TDC's POSITION KEEPER.
8. Go to the distance/bearing section and click on the send button to realign the heading (it is not necessary to use the stadimeter or anything).
9. Watch the attack map and wait for the attack path marker to get to 180 or 360 (assuming that is how you set up your attack).
Provided the target does not move off course too terribly much (zig zagging) you should score a hit easily. I usually attack from between 1000 and 2000 yards away.
This is pretty much the WernerSobe method (
http://www.filefront.com/8894549/SH4...up_and_Ate.wmv) and I believe it is the way the TDC is intended to be used. There are other methods to score manual hits, though.
The other thing I do not know 100% is whether you have to be stopped for this to work properly; I suspect the TDC is able to calculate your boat's movement. I usually attack from a dead stop, just to be sure, though.
C Filson