🔍 Key Concepts

• Relative bearing vs. true bearing – understand what each one is measured from • How to convert a relative bearing taken from the ship’s head into a true bearing using the ship’s true course • Working with bearings on a 0°–360° compass circle and adding/subtracting correctly

💭 Think About

• Ask yourself: From what reference is a relative bearing measured, and from what reference is a true bearing measured? • Think: If your ship’s true course is 180°T, where is your bow pointing on the compass, and how far (in degrees) is the lighthouse from that bow direction? • When you combine the ship’s heading and the relative bearing, do you need to add or subtract, and will the result stay within 0°–360° or need adjusting?

✅ Before You Answer

• Be sure you are measuring relative bearing from the ship’s head (0° at the bow, increasing clockwise) • Confirm whether you should add the relative bearing to the true course or perform some other operation • After your calculation, check that your final true bearing lies between 000° and 359° and matches one of the choices