You have determined the maneuvering characteristics of your vessel by taking radar ranges and bearings of an isolated light while making a turn. The results are as shown. Based on this data what is the advance for a turn of 60°? Illustration D035DG

Correct Answer: Option A — 665 yards

Advance is measured along the original course line from the point where the rudder is put over to the position where the vessel has changed heading by the specified amount. Radar plotting per illustration D035DG yields 665 yards for a 60-degree turn.