As you enter the New Haven Outer Channel,...

Question 1 of 29218fork_0387d2ab79b34bf1a70

As you enter the New Haven Outer Channel, you sight the outer range markers in line directly ahead. Your heading at this time is 347°psc. What is your compass deviation by observation?

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Question 1 of 29218

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As you enter the New Haven Outer Channel, you sight the outer range markers in line directly ahead. Your heading at this time is 347°psc. What is your compass deviation by observation?

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🔍 Key Concepts

• Compass error by range (comparing compass heading to known true course of a range) • Relationship between variation, deviation, and compass error • Using the printed course of the New Haven Outer Channel range from a chart or table

💭 Think About

• What is the true course of the New Haven Outer Channel range, and how does your compass heading (347°psc) compare to that? • Once you find the total compass error (difference between true and compass), is the compass reading too high or too low compared to the known true course? • From total compass error, how do you separate variation (from the chart) and deviation (for this compass heading)?

✅ Before You Answer

• Verify the true bearing of the range from the chart or exam reference table before doing any math. • Check the sign convention: "East" error if compass reads too low or too high? Be consistent. • Confirm the chart’s magnetic variation and year/corrected value, then subtract it from total compass error to isolate deviation.