Evasion Suggestions

[Rockin Robbins]

Time to answer the question, I guess. Actually hovering underwater is as easy as hovering on the surface. Usually water is divided into at least two layers, a top layer of warmer water and a lower layer of colder water. Colder water is more dense. It is not difficult to ballast the submarine so it has negative buoyancy in the warm water, but still has positive buoyancy in the cold layer below.

The submarine will then float on the layer for hours or days with no trim adjustments necessary. All power can be shut down if necessary because this is a stable condition.