That does make sense.
Do you remember the discussion we were having about the ballast tanks?
I am still trying to find online documentation that explains the saddle tanks/main ballast tanks/negative tank.
Cutaway illustration
Illustrations never show the saddle tanks in detail. But this one shows 81 - Main immersion tank and 93 - Main fuel tank
and this illustration shows the MB#3 below the control room, like the illustration outside of U-995. On the third section, it lists "MB and RFO Tank 2 Port", is that inside the saddle bulges? I think you were saying that the saddle tanks are one long "tank" with baffles to separate the sections, is that right? So the MB2 and MB4 are contained inside the saddle bulges...?
And of course it shows MB#5 in the center bow, which I would assume is flooded before the stern tank to get the bow down.
There is a "Neg.Buoyancy Tank Port". If that is the "negative" tank (or tanks, one on each side I suppose), that sure seems like a small tank to get you down quickly.
I'm tempted to build a time machine just to go back and answer these questions.