What must be worn over a dry suit at all times?

Wearing a survival vest over a dry suit is essential for several reasons. A survival vest is designed to provide not only buoyancy but also a range of survival gear that can be crucial in emergencies. These vests typically include pockets for stowing essential items like signaling devices, first aid kits, and other safety equipment, which can enhance the chances of survival in the water.

When operating near or in cold water, the combination of a dry suit and a survival vest increases the overall safety of the individual. The dry suit protects against hypothermia by keeping the wearer dry, while the survival vest adds buoyancy and access to necessary equipment. Having both pieces of gear ensures that the operator is well-prepared for any situation that may arise while performing duties on the water.

In contrast, while flotation devices and life jackets also provide buoyancy, they may not offer the same additional features and equipment needed for prolonged survival in cold water situations. A safety helmet is primarily designed to protect the head and may not provide buoyancy or necessary survival gear. Therefore, the combination of a dry suit and a survival vest is the best choice for ensuring safety and readiness in maritime operations.