1226. Your vessel is steering 283°T at 10 knots. At 0538 a light bears 350°T, and at 0552 the same light bears 002°T. What will be your distance off abeam?

The distance off abeam can be calculated using trigonometry and the relative bearings and time between observations. The distance run is 2.33 NM, and the difference in relative bearings (67 and 79) allows for calculation of the perpendicular distance from the track to the light, resulting in a distance off abeam of approximately 10.3 miles.