[Rockin Robbins]

The important thing is to remain on the surface every second you can. The number of contacts you develop is proportional to the number of square miles you search in a day. And you have to be able to fight your boat. That means your batteries should be fully charged when you enter combat. After all, you don't know how long escorts might keep you down.

But the worst thing about running around with batteries not fully charged is that while charging your diesels run wide freaking open until you're at full change. There goes any decent range! Every minute you don't have fully charged batteries subtracts lotsa minutes on station.