Question 1841Navigation General

The correct answer is D) 270°. The relative bearing of an object on the port beam is 270°. This is because the port beam is the side of the vessel to the left when facing forward, and the relative bearing of an object at the port beam would be 90° to the left of the vessel's heading, which is 270°. The other answer choices are incorrect because: A) 045° is the relative bearing of an object on the starboard bow, B) 090° is the relative bearing of an object directly to the side of the vessel, and C) 180° is the relative bearing of an object directly astern of the vessel.