Personnel with a need to be in the rescue area on a steep edge should tie in to ________.

Personnel who need to be in the rescue area on a steep edge should tie in to personnel safety lines to enhance their safety and provide a reliable means of protection against falls. Personnel safety lines are specifically designed to prevent individuals from falling into hazardous areas, such as steep embankments or cliffs, and offer a means of securing rescuers while they perform their duties.

Using safety lines ensures that if a rescuer slips or loses balance, the safety line will help to stop their fall and keep them secure, allowing for effective rescue operations without endangering the personnel involved. The personnel safety lines act as a critical safety measure, providing support and reducing the risks associated with working at heights or unstable edges.

In contrast, while the other options may seem viable in certain contexts, they do not provide the same level of individual security needed in a steep rescue scenario. The emphasis on personnel safety lines reflects the focus on maintaining safety and minimizing the risk of accidents during rescue operations in challenging environments.