What is the lifeline signal to indicate "all right" when the person is at rest?

The lifeline signal indicating "all right" when a person is at rest is signaled by one pull. This signal is simple and effective, allowing for quick communication in potentially hazardous or noisy environments, such as construction sites or rescue operations. It ensures that team members can confirm that everything is fine without escalating the situation or causing unnecessary alarm. The use of a single pull minimizes confusion and allows for clear, concise communication among team members. In contrast, the other options would typically represent different levels of alert statuses or requests for assistance, which are not applicable when someone is simply conveying that they are okay and at rest.