MK-20 / KM-37 Portable Surface Supplied Diving Systems Practice Test

If a diver feels cold during the dive, signaling for assistance and ascending to warmer waters is the recommended action. Cold can lead to hypothermia and decreased performance, which can compromise the diver's safety. By signaling for assistance, the diver ensures that they have support in case they need help transitioning to a shallower depth or returning to the surface safely. Ascending to a warmer environment can help to mitigate the risks associated with cold exposure, allowing the diver to maintain their safety and effectiveness.

It's essential to address cold exposure promptly, rather than trying to tough it out or relying solely on heat packs, which may not provide immediate relief or may not be effective depending on the severity of the cold. Completing the dive time without addressing the discomfort can lead to serious consequences, including impaired cognitive function and physical capabilities. Thus, seeking assistance and moving to a warmer area when feeling cold during the dive is a prudent and safety-focused choice.