Where is 'THIS' file?

What file allows me to adjust the time compression of my U-boat near land so that it is faster than X4. I downloaded the kiel canal but it takes forever to get through it at x4 doing 7 knots in a type II. Is there a way I can set all my waypoints throughout the canal and have my U-boat zoom through them all at X1024 or X2048 without my boat running aground?

Thanks in advance!