I am in my sinister laboratory right now, stictching together all the pieces of the monster and shortly I will pull the switch and see what happens. Mwa-ha-ha-ha-ha!
Edit: partial success. It was the wrong bearing plotter and didn't have to 3000 meter range. It works well and I did come up with a mod that uses imperial measurements for US boats and metric for German ones. Now to track down the proper overlay.....