Just a little HINT guys, i dont know if you know about that:
You can even plan where exactly will the sun be at your attack time to plan your position to attack from dark and see sun/moon behind your target.
- open chalkboard by shift+B, click small chalk, then update your last position fix by button there - your position fix lat/long will fill into inputs - good. Then click OK and update sun/moon data by little circle at lower left corner of chalkboard.
Now you'll see actual sunset/sunrise
(bearing) at your current position. So you can position yourself to have target at that bearing when you'll attack.
You can of course even shadow your convoy till ideal time of moon with this data
