Ahhh all these talking about the adventure in the new world makes me think again about my decision of sticking to a VII...

The 7s can make it that far. With cairful fule managment you can get to there with only using 1/3 of your deisle and back on the same mesure. This leaves you with a whole 1/3 to patrol on and if you keep the going slow and make good use of the electric your patrol can last a fairly long time.