Which is TRUE concerning immersion suits and their use?

Correct Answer: Option B — They provide sufficient flotation to do away with the necessity of wearing a life jacket.

Immersion suits are designed to provide both thermal protection and sufficient inherent buoyancy to keep a person afloat. Under 46 CFR 199.70, these suits are approved as a substitute for a life jacket because they meet the buoyancy requirements necessary to support a person in the water without additional gear.