You desire to make good a true course of...

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Question 1 of 2066636eea28f7522a1c51b092

You desire to make good a true course of 038°. The variation is 5°E, magnetic compass deviation is 4°W, and gyrocompass error is 4°W. A southeasterly wind produces a 4° leeway. What is the course to steer per standard magnetic compass to make the true course good?

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Question 1 of 20

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🔍 Key Concepts

• Relationship between true, variation, magnetic, deviation, and compass (TVMDC) • How to apply gyro error and leeway when finding a course to steer • Sign convention for east/west corrections ("East is least, West is best")

💭 Think About

• Start from the desired true course and decide the correct order to apply leeway, variation, deviation, and gyro error. Which ones change the path through the water, and which ones change only the heading you steer? • Carefully track your signs: when the wind is from the southeast giving leeway, does your course made good shift to the left or right? Which way must you then steer to compensate? • Once you get to magnetic and then compass, check whether an east or west correction makes the reading larger or smaller, based on the usual TVMDC rule.

✅ Before You Answer

• Be sure whether leeway is applied to or from the true course (are you finding course made good or course to steer?). • Confirm your TVMDC sequence and the correct saying you use (for example, many mariners use: "True / Virgins / Make / Dull / Companions" to remember the order). • Before choosing an answer, verify that your final angle makes sense: does the course to steer lie upwind of the desired track by about the leeway amount?

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