I havent the foggist how to do this...
Find Vigan on the map, west side of Luzon. Zoom down till the black range bar reads 21.0nm. Enable tool helper and with your ruler put the start point on the dot for Vigan, draw a line 9nm long going West, (as you come out you will see the line go through 270 on the tool helper)
At the western end of this line draw another one going directly North 6750yds. Now set some waypoints so that your sub ends up at the top of the 6750 line facing NE.
I'll try to figure something out..I want to use my Gato..2 deck guns,2 AAA guns and 40 torps......