Hello Mr. Tore,
I'm having an issue about (rethinking) how to describe the ballast tanks...
In the type VII U-Boat the forward, center, and aft tanks are described as Tauchzelle or diving cells, and the saddle tanks are described as Tauchbunkers or diving bunkers.
Diving cells are strictly water ballast tanks, and diving bunkers are configurable to a reserve fuel oil (RFO) or a water ballast.
When did these tanks become Main Ballast Tanks and labeled MBT 1, MBT 2, MBT 3, MBT 4, and MBT 5? Was this done in translation to eliminate the confusion between the Gerrman diving cells and diving bunkers?
Which is correct?
Regards,
Don_