Most economic cruising speed

[Letum]

Originally Posted by rifleman13

It's very economic to always go ahead one-third in all u-boats!

No it's not! You can cut your range by more than 10% doing that.

Best speed* for VIIC with no engine upgrades in 7.5 knts Best speed with the most expensive upgrade is 8knts or just over.

*this is the best miles per gallon speed, it does not take time into account.

Running submerged for part of each day uses slightly more fuel per mile.