I have a question regarding the tanks on my 43' DCFB.

There are four and they are as follows:

The most forward is a 90 gallon holding tank integral to the hull.
Aft of that tank is a 130 gallon water tank, rectangular, flat bottom and sitting on top of the keel.
Aft of that tank is a 90 gallon diesel tank, also rectangular, flat bottom and sitting on top of the keel.

All the way aft is an almost square, 285 gallon diesel tank that I know has a flat bottom and is situated under the centerline queen bed.

Am I correct regarding the forward 3 tanks?

Thank you all!

Jon