You wish to make good a course of 258°T,...

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Question 1 of 2066636ee928f7522a1c51a740

You wish to make good a course of 258°T, allowing 4° leeway for northerly winds. The variation is 21°W. What should you steer per standard magnetic compass to make good 258°T?

DEVIATION TABLE Magnetic Heading Deviation 285° 5°E 270° 3°E 255° 1°E 240° 1°W

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Question 1 of 20

66636ee928f7522a1c51a740

You wish to make good a course of 258°T, allowing 4° leeway for northerly winds. The variation is 21°W. What should you steer per standard magnetic compass to make good 258°T?

DEVIATION TABLE Magnetic Heading Deviation 285° 5°E 270° 3°E 255° 1°E 240° 1°W

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🔍 Key Concepts

• Leeway: how wind from the north will push your vessel and how to correct course for it • Order of applying True, Variation, Deviation, Compass (TVMDC) and where to include leeway in that chain • Using the deviation table correctly by interpolating or picking the closest listed magnetic heading

💭 Think About

• Should the 4° leeway be added to or subtracted from the desired true course when the wind is from the north and you want to make good 258°T? Sketch the situation. • After allowing for leeway, when you convert from true to magnetic using 21°W variation, do you end up with a larger or smaller magnetic value? Think of the memory aid: "West is best, East is least." • Once you get a magnetic heading, which deviation value from the table applies, and will that deviation make the final compass course larger or smaller?

✅ Before You Answer

• Be clear about whether course to steer or course made good gets the leeway correction. • Apply variation between true and magnetic, and deviation only between magnetic and compass – don’t mix them up. • Confirm that your final answer is expressed as per standard compass (psc), not true or magnetic, and that it’s close to a heading that makes sense with a 4° correction and 21°W variation.

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Question 1 of 2066636ee928f7522a1c51a740

You wish to make good a course of 258°T, allowing 4° leeway for northerly winds. The variation is 21°W. What should you steer per standard magnetic compass to make good 258°T?

DEVIATION TABLE Magnetic Heading Deviation 285° 5°E 270° 3°E 255° 1°E 240° 1°W

Back

Question 1 of 20

66636ee928f7522a1c51a740

You wish to make good a course of 258°T, allowing 4° leeway for northerly winds. The variation is 21°W. What should you steer per standard magnetic compass to make good 258°T?

DEVIATION TABLE Magnetic Heading Deviation 285° 5°E 270° 3°E 255° 1°E 240° 1°W

No comments yet

Be the first to share your thoughts!

If the question has a related picture, it will appear here.

🔍 Key Concepts

💭 Think About

✅ Before You Answer

👋 Hi! I'm Genie, your AI study assistant. How can I help you with this question?

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