The true course between two points is 106°....

Question 1 of 31048fy_heal_CREATE_q126_2027

The true course between two points is 106°. Your gyrocompass has an error of 2°E and you make an allowance of 2° leeway for a south wind. What gyro course should be steered to make the true course good?

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Question 1 of 31048

🔍 Key Concepts

• Relationship between true course (T) and gyro course (G) when there is a gyro error East or West • How leeway affects the ship’s actual track and why you normally steer into the leeway • The sign convention: whether you should add or subtract gyro error and leeway when going from true course to gyro course to steer

💭 Think About

• If the gyrocompass has a 2°E error, is the gyro reading higher or lower than the true heading? Based on that, when you want a true course of 106°, should the gyro course you steer be greater or less than 106°? • A south wind will push the vessel toward which side of your intended track (port or starboard)? To keep the track made good at 106°T, do you steer into the wind or away from it? • Write the relationship in one line, such as: True = Gyro ± gyro error ± leeway. Then solve that equation for the Gyro course you must steer so that the True course made good is 106°.

✅ Before You Answer

• Verify the correct formula: True = Gyro ± Gyro Error (decide which sign applies to an East error) before using numbers. • Confirm the direction of leeway caused by a south wind, and remember you steer into leeway (apply the correction on the steering side, not the drift side). • After choosing an answer, mentally apply your gyro error and leeway to your chosen pgc value and check that the resulting true course made good comes out to 106°.