On 27 June your vessel's 0816 ZT DR position...

Question 1 / 2066636eea28f7522a1c51adbc

Question 1 of 2066636eea28f7522a1c51adbc

On 27 June your vessel's 0816 ZT DR position is LAT 22°14'S, LONG 53°52'W, when an azimuth of the Sun is observed. The chronometer time of the sight is 12h 15m 02s, and the Sun is bearing 047.5° per standard magnetic compass. The chronometer error is 00m 46s slow, and the variation in the area is 6.0°E. What is the deviation of the standard magnetic compass?

Back

Question 1 of 20

66636eea28f7522a1c51adbc

No comments yet

Be the first to share your thoughts!

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

🔍 Key Concepts

• Azimuth of the Sun used to find compass error (CE) and then deviation • Relationship between true bearing, magnetic bearing, compass bearing, variation, and deviation • Correcting the chronometer time and determining the Sun’s true azimuth at the DR position and time

💭 Think About

• How do you go from the observed compass bearing of the Sun to a true bearing using variation and deviation? Think about the standard correction sequence. • What steps are needed to turn the chronometer time with error into the correct UTC/GMT to enter the Nautical Almanac, and why does that matter for the Sun’s azimuth? • Once you compute the true azimuth of the Sun from the Almanac and sight reduction, how do you compare it to the compass bearing to extract compass error and then deviation?

✅ Before You Answer

• Be sure you apply the chronometer error with the correct sign (slow vs fast) when finding UTC. • Keep the correction order straight: True ↔ Magnetic ↔ Compass; track whether you are moving from true to compass or compass to true. • Check whether your final computed deviation is east or west by seeing which way the compass is deflected from magnetic.

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

Quick actions

— No credit card needed

Question 1 of 20

1.5°E

1.9°W

3.0°W

3.0°E

Loading interactive features...

Question 1 / 2066636eea28f7522a1c51adbc

Question 1 of 2066636eea28f7522a1c51adbc

Back

Question 1 of 20

66636eea28f7522a1c51adbc

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