Welcome Neves!
What type boat do you have? Are you playing GWX?
With any type IX boat you should be able to cross Atlantic and return. Your most efficient speed is 7 -- 8 knots. Higher speeds will burn waaaay too much fuel.
Check with your navigator what is the longest range at different speeds.
Bad weather will also affect your fuel consumption.
In GWX, the position of available milkcow boats appears on the charts.
If you avoid long high speed chases, you should have adequate fuel for your mission.
Enjoy the forum!
