Under what conditions is the RS helmet required to be worn prior to deployment?

The requirement to wear the rescue swimmer (RS) helmet prior to deployment is primarily focused on safety considerations related to visibility and environmental conditions. In situations occurring at night or in adverse sea states, such as sea state greater than 4, the helmet provides essential protection for the swimmer.

Nighttime conditions present heightened risks, including reduced visibility for both the swimmer and the crew. The helmet is equipped with reflective materials and often has illumination devices that enhance visibility. This ensures that the rescue swimmer can be seen clearly during operations, which is critical for both safety and effective coordination.

In addition, a sea state greater than 4 indicates significant waves and turbulence, which pose risks of head injuries from impacts, as well as increased challenges in maintaining balance and control. The helmet acts as a safety measure to protect against these environmental hazards, making it crucial for the swimmer’s safety in these challenging conditions.

Other situations, such as heavy rain, daytime, or low temperatures, do not necessarily present the same level of risk that warrants mandatory helmet use prior to deployment. Thus, the combination of nighttime operations and challenging sea conditions justifies the requirement for wearing the RS helmet.