47. Your vessel is on a course of 126°T at 17 knots. At 0251 a light bears 099.5°T, and at 0313 the light bears 081°T. At what time and at what distance off will your vessel be when abeam of the light?

Applying trigonometry to the observed bearings and distance run allows calculation of the time and distance off when the vessel is abeam of the light, resulting in a time of 0335 and a distance of 6.2 nautical miles.