EOD Scuba Supervisor Practice Exam

In surface-supplied diving, the tender communicates with the diver through a set of line-pull signals. A four-to-three line pull is a coded instruction that means the diver should circulate. Circulate here means moving around the work area in a circular path while staying connected to the line, so the tender can maintain control and track the diver’s position as work progresses or as the diver navigates around obstacles. This is distinct from signals that indicate lifting, descending, or loosening the line, which would use different pull patterns. By circulating, the diver can inspect or work around a target area while the surface crew keeps the diver within the tether’s control.