Which situation typically requires a 13-man duty crew?

A 13-man duty crew is typically required for hot work operations due to the inherent risks and hazards associated with these activities. Hot work refers to any operation that involves open flames or produces sparks, such as welding, cutting, or grinding. Given the potential for fire and explosion, safety regulations necessitate a larger crew to ensure adequate monitoring and response capabilities during such operations.

The increased number of personnel allows for enhanced safety measures, including the assignment of specific roles such as fire watch, equipment monitoring, and ensuring that fire prevention protocols are strictly adhered to. This helps guarantee that there are enough resources to effectively manage any emergencies that may arise during the hot work.

While the other situations mentioned may call for a crew, they typically do not pose the same level of immediate danger that requires such a significant crew presence dedicated to safety and response. For example, routine maintenance and visitor onboarding generally allow for fewer personnel due to lower associated risks, and ship docking operations may require careful coordination but do not necessarily demand as large a crew as hot work does.