On 27 September your 0345 ZT DR position is...

Question 1 of 2707066636eea28f7522a1c51adc1

On 27 September your 0345 ZT DR position is LAT 26° 18.0' S, LONG 4° 18.0' W. You are on course 271° T at a speed of 15 knots. What will be the zone time of sunrise at your vessel?

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Question 1 of 27070

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On 27 September your 0345 ZT DR position is LAT 26° 18.0' S, LONG 4° 18.0' W. You are on course 271° T at a speed of 15 knots. What will be the zone time of sunrise at your vessel?

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🔍 Key Concepts

• Use the Nautical Almanac sunrise tables for the correct latitude and date • Convert between GMT (UT) and Zone Time (ZT) using your longitude to find the correct time zone • Account for the ship’s movement between DR time and sunrise time when determining longitude

💭 Think About

• First, at 27 September and about 26° S, what GMT of sunrise does the Almanac show near your longitude? • How many hours difference is there between your zone time meridian and Greenwich, based on your longitude, and what is the correct sign (east or west)? • In the time between 0345 ZT and sunrise, how far will the vessel travel west, and how does that change the longitude you should really use for sunrise?

✅ Before You Answer

• Be sure you are using the correct latitude band and date in the Nautical Almanac tables • Confirm the zone description (ZD) from your longitude and use the correct sign when converting GMT to ZT • Recheck the DR longitude at sunrise, not just at 0345 ZT, before picking the closest answer