What statement best represents the characteristics of innage and ullage tank soundings?

Correct Answer: Option D — Innage is the distance between the surface of the liquid and the bottom of the tank, and ullage is the distance between the surface of the liquid and the top of the tank.

Innage measures the depth of the liquid from the tank bottom to the surface, representing the actual volume of fluid. Ullage measures the empty space from the surface of the liquid to the top of the tank, which is critical for preventing overfilling during bunkering operations.