You are on course 056° per standard magnetic...

Question 1 / 2066636eea28f7522a1c51afb2

Question 1 of 2066636eea28f7522a1c51afb2

You are on course 056° per standard magnetic compass when you sight Block Island North Light in line with the Block Island Aero Beacon bearing 193° per standard magnetic compass. Based on this information which of the following should you do?

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🔍 Key Concepts

• Compass error vs deviation (what each one means and how they are found) • Using transits/range lines (two objects in line) to check compass accuracy • Difference between course steered and bearing taken on the same compass

💭 Think About

• If two charted objects (like a light and an aero beacon) are exactly in line, what should be true about their bearing on the chart? Compare that to what you see on your compass. • Think about whether this situation gives you information about the compass error for all headings, only for the heading you are steering, or only for that specific bearing you observed. • Ask yourself: does a single transit observation prove the whole deviation table is right, or does it only tell you something about one direction at that moment?

✅ Before You Answer

• Look up the true bearing of the transit (line between the North Light and the Aero Beacon) from the chart and compare to the 193° psc you observed. • Decide whether you are learning about deviation on 056° psc (your heading) or on 193° psc (the bearing you took). • Confirm that compass error = variation + deviation, and decide whether you actually know variation and which part of that equation this transit check can tell you.

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Question 1 of 20

know the deviation table is correct for that heading

know the compass error is 4°E

use 3°W deviation on bearings of 193°psc

swing your vessel to check for deviation

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Question 1 / 2066636eea28f7522a1c51afb2

Question 1 of 2066636eea28f7522a1c51afb2

Back

Question 1 of 20

66636eea28f7522a1c51afb2

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?

Quick actions

— No credit card needed