The Maneuvering Board method allows you to plot the target(s) using their relative position from one uboat position.
All plotting systems shown thus far in these forums only demonstrate a method that you must plot both the target and the uboat's progress within the timed run ... there is nothing wrong with doing it that way; however, within the military combat control centers (CIC) plotting is accomplished using the MOBOARD method.
What I am trying to illustrate here is that there are other methods available that are more in keeping with history, and especially those who would like to try navigation without the "training wheels" of the waypoint tool and the "moving" U-boat icon, or any ship icon for that matter, on the F5 screen.
Relative movement means that it appears that the target is moving in a particular direction due to the movement of both vessels. The Moboard allows the user to simplify this relative movement via vectors and precisely figure the target's TRUE course and speed. Once computed, the reverse may then be applied with the target placed in the center and then vectors applied to the U-boat to figure distance and speed necessary to make an end round for future attack.
A real MOBOARD looks like this:
You can find these for free DL if you wanted to use an off-computer, external method as well.
cheers,