Mod order help for GFO please help

[Rockin Robbins]

These subs have plenty of fuel to do missions until you're absolutely bored and want to return to port. I routinely pick up four or five assignments and never have any trouble getting back to Pearl from Japan or the Straits of Formosa. The trick is not to gallivant all over the ocean at high throttle settings. Your top fuel economy is at about 9.5 knots. With that your range is immense. Double your speed and cut your mileage by a factor of at least four.

Faster speeds can be used in combat without impacting your ability to return to base because you're using those speeds such a small proportion of the time. You can be at Japan with a quarter tank and easily get back to Pearl Harbor at cruise speed of 9.5 knots. So there is no hit or miss. There are good boat handling skills and bad ones.