On 20 June your 0800 zone time DR position...

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Question 1 of 2066636eea28f7522a1c51ac3d

On 20 June your 0800 zone time DR position is LAT 21°02.0'N, LONG 152°50.0'E. Your vessel is on course 265°T at a speed of 15.0 knots. What is the zone time of local apparent noon (LAN)?

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Question 1 of 20

66636eea28f7522a1c51ac3d

On 20 June your 0800 zone time DR position is LAT 21°02.0'N, LONG 152°50.0'E. Your vessel is on course 265°T at a speed of 15.0 knots. What is the zone time of local apparent noon (LAN)?

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🔍 Key Concepts

• Local Apparent Noon (LAN) occurs when the Sun is on your local meridian (crosses your longitude) • Relationship between longitude and time (4 minutes of time per degree of longitude) • How to use your DR longitude, course, and speed to find the longitude you will be on at LAN

💭 Think About

• From 0800, will LAN occur before or after 1200 ship’s time, given your longitude (~153°E)? • How far (in longitude) will the vessel travel between 0800 and the approximate LAN time, and how does that affect the meridian passage time? • First estimate LAN using current longitude, then refine it by allowing for the run made during that time — does this make your LAN earlier or later?

✅ Before You Answer

• Convert longitude to time correctly using 15° = 1 hour and 1° = 4 minutes of time • Be careful with E vs W longitude: in the eastern longitudes, local time is ahead of GMT (Greenwich Mean Time) • After estimating LAN time, check that the distance run (speed × time) is reasonable for 15 knots and that the change in longitude from this run has been allowed for consistently

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Question 1 of 2066636eea28f7522a1c51ac3d

On 20 June your 0800 zone time DR position is LAT 21°02.0'N, LONG 152°50.0'E. Your vessel is on course 265°T at a speed of 15.0 knots. What is the zone time of local apparent noon (LAN)?

Back

Question 1 of 20

66636eea28f7522a1c51ac3d

On 20 June your 0800 zone time DR position is LAT 21°02.0'N, LONG 152°50.0'E. Your vessel is on course 265°T at a speed of 15.0 knots. What is the zone time of local apparent noon (LAN)?

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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