On September 9 your 2130 zone time (ZD +5)...

Question 1 / 2066636eea28f7522a1c51b53f

Question 1 of 2066636eea28f7522a1c51b53f

On September 9 your 2130 zone time (ZD +5) DR position is LAT 45°08'N, LONG 82°38'W. At that time, you observe Polaris bearing 000.5°pgc. The chronometer time of the observation is 02h 26m 09s, and the chronometer is 1m 43s slow. The variation is 8.7°W. What is the gyro error?

Back

Question 1 of 20

66636eea28f7522a1c51b53f

No comments yet

Be the first to share your thoughts!

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

🔍 Key Concepts

• Polaris as a latitude check and its relationship to true north • Converting chronometer time to GMT using chronometer error and zone description (ZD) • Relating true bearing vs. gyro bearing to determine gyro error (east or west)

💭 Think About

• How do you get the correct GMT of the observation from the given chronometer time, chronometer error, and ZD +5? • Once you have the latitude and the approximate azimuth of Polaris (very close to true north), how does that help you find the true bearing to compare with the 000.5°pgc observed? • When the compass (or gyro) reads a bearing that is different from the true bearing, what rule tells you whether the error is easterly or westerly?

✅ Before You Answer

• Be sure you have applied the chronometer error (slow vs fast) in the correct direction when finding GMT. • Confirm you have converted from gyro bearing to magnetic and then to true, or directly compared gyro to true, in a consistent sequence. • Double-check your final step: when the instrument reads higher or lower than the true bearing, is that an east or west error according to the standard sign convention?

👋 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

0.7°E

1.2°E

0.8°W

9.4°W

Loading interactive features...

Question 1 / 2066636eea28f7522a1c51b53f

Question 1 of 2066636eea28f7522a1c51b53f

Back

Question 1 of 20

66636eea28f7522a1c51b53f

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