The correct answer is B) 292.5°. The compass course of a vessel heading WNW (West-Northwest) is 292.5°. This is because the 16-point compass rose divides the full 360° circle into 16 equal parts, with each point representing 22.5° increments. WNW falls directly between the West (270°) and Northwest (315°) compass points, which means the correct compass course is the average of these two, or 292.5°. The other options are incorrect because 270.0° is due West, 315.0° is due Northwest, and 337.5° is North-Northwest, which are not the correct compass course for a vessel heading WNW.