Which of the following statements is true concerning an immersion suit and its use?

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

Modern immersion suits are engineered with inherent buoyancy exceeding SOLAS standards, entirely eliminating the legal requirement to don an additional wearable lifejacket. They trap insulating air and provide flotation while protecting the wearer against rapid hypothermia in cold waters.