[Avionic]

Originally Posted by Freebird

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The worst part is when you sustain hull damage and your range diminishes slightly. When it happened, I beelined it for port or closest fuel and spent as much time as possible submerged on batteries. Took 3 tries on one patrol to get home that way. Pretty irritating to run out when trying to get home.
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Gary

Maybe I misunderstood what you wrote, but submerging is not good for your fuel economy.
The batteries will be charged again with your fuel, and that will use more energy. It is more efficient to just run on the surface at 10 kts and enjoy the wiev.