PADI Divemaster Certification Practice Exam

What is a potential issue with a tight wet suit hood or dry suit collar?

1. It keeps the head warm

2. It restricts blood vessel flow

3. It enhances circulation

4. It prevents water from entering

The correct answer is: It restricts blood vessel flow

A tight wet suit hood or dry suit collar can create issues primarily because it restricts blood vessel flow. When a person's body is submerged in water, maintaining proper circulation is crucial for thermoregulation and overall comfort. If the wet suit hood or dry suit collar is too tight, it can compress blood vessels, especially around the neck and head area, which may lead to restricted blood flow. This restriction can result in various problems, such as cold-related injuries, impairing cognitive functions due to reduced blood supply to the brain, or promoting an unsafe diving situation by reducing the diver's ability to cope with cold water. It is essential for the fit of a suit to allow adequate circulation for warmth and comfort while still serving its primary functions, which include insulation and preventing water entry. In contrast, while a snug fit can sometimes help with thermal protection and keep water from entering, the potential risks associated with impeded blood flow make it critical to ensure that any wet suit hood or dry suit collar fits properly enough to avoid tightness that could compromise circulation.