On 5 May your 1300 ZT DR position is LAT 25°...

Question 1 of 2707066636eea28f7522a1c51ae27

On 5 May your 1300 ZT DR position is LAT 25° 16.0' S, LONG 12° 30.0' W. You are on course 012° T at a speed of 14 knots. What will be the zone time of sunset at your vessel?

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Question 1 of 27070

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On 5 May your 1300 ZT DR position is LAT 25° 16.0' S, LONG 12° 30.0' W. You are on course 012° T at a speed of 14 knots. What will be the zone time of sunset at your vessel?

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🔍 Key Concepts

• Zone Time (ZT) vs Greenwich Mean Time (GMT/UT) and how longitude determines your time zone • Using the Nautical Almanac sunset tables for the correct date and latitude • The difference between Local Mean Time (LMT) of sunset and the zone time at the ship

💭 Think About

• At 1300 ZT, where are you in longitude, and does your position change enough before sunset to matter for this problem? • For the given latitude and date, what is the approximate LMT of sunset, and how do you convert LMT to ZT using your longitude? • Is your longitude east or west, and does that make your local time ahead of or behind the zone meridian time?

✅ Before You Answer

• Verify you’re using the correct time zone meridian for your longitude (remember: 15° per zone). • Check the sign of the longitude (E or W) and apply the time correction in the right direction when going between GMT, LMT, and ZT. • Confirm that you are using latitude 25° S and the correct date (5 May) in the Nautical Almanac sunset pages before applying any time corrections.