The boat crew survival vest was designed to aid personnel to do what in hazardous situations?

The boat crew survival vest is specifically designed to sustain survival in hazardous situations. This means it contains essential survival equipment and features that enhance a person's chances of staying alive in emergencies, particularly in marine environments. The vest may include flotation aids, signaling devices, water purification systems, and other survival gear that enable a boat crew member to effectively manage their situation until rescue or recovery can occur.

By focusing on sustaining survival, the vest plays a critical role in ensuring that personnel can maintain their physical and psychological well-being during distress, providing them with the necessary tools to endure until they can be brought back to safety. The other options may relate to aspects of the vest’s utility but do not encompass the broader purpose of survival that is central to its design.