Manual TDC generally refers to your third option.
I would however state that the speed calculator in the notepad is very buggy and hard to get to work. The only real way to get the speed without using the Weapons Officer is to do it manually.
I use the equation:
(d/t) x 30.866 = Knots
Where d= distance travelled in kilometers, and t= time in minutes.
so if he travels 800 meters in 3 minutes you'd write the equation as:
(0.8/3) x 30.866 = 8.2 Knots
The longer the time generally the more accurate it is.
You can gather the needed information using Wazoo's method but since you have the equation it doesn't have to be 3:15. Just measure the distance between the two markings for the ship and thats the distance travelled.
Easy Peasy.
__________________
|