Chief Mate · turn planning
Course 010° (T) at 12 kn. After 6 n.m. alter to 085° (T). Radius 2.0'. Advance (0°) = 4 cables. Current 315° × 2 kn. Walk the construction, then read the worked method.
4/4 ROT = V / R = 12 / 2 = 6°/min. Time on the arc = 75° / 6 = 12.5 min.