(October 19, 2017 at 8:11 am)Gawdzilla Sama Wrote:(October 19, 2017 at 7:50 am)Anomalocaris Wrote: The buoyancy tank no longer displace water. It accommodate water now.
You get the concept wrong. The displacement is the hull, not things inside it. The tanks weigh one figure empty and another full, but they don't a change the volume of the submarine by going from one to the other.
What you describe is not a concept. It is a convention.