On 13 November your 1030 ZT DR position is...

Question 1 / 2066636eea28f7522a1c51aa93

Question 1 of 2066636eea28f7522a1c51aa93

On 13 November your 1030 ZT DR position is LAT 19° 03' S, LONG 6° 34' E. You are on course 164° T, speed 12 knots. Determine your 1200 position using the following observations of the Sun. ZONE TIME GHA DECLINATION Ho 1112 351° 55.4' S 18° 00.4' 88° 08.0' 1121 354° 10.4' S 18° 00.5' 88° 33.9'

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🔍 Key Concepts

• Running fix using two Sun lines of position (LOPs) at different times • Advancing and retarding LOPs based on course and speed made good between observations • Using DR (dead reckoning) to carry your position from 1030 ZT to the times of each observation and then to 1200 ZT

💭 Think About

• How far (in nautical miles) do you travel between 1030 and each observation time, and in what direction on the plotting sheet? • Once you plot each LOP at its correct time, how do you advance/retard one LOP so both apply to a common time to obtain a running fix? • After you obtain a running fix time, how do you project that position along your course and speed to reach the 1200 ZT position?

✅ Before You Answer

• Convert each time interval (minutes) to hours correctly before multiplying by 12 knots (speed) • Make sure all distance advances/retards are laid out along course 164° T (not along the LOPs) • After plotting, compare your final position’s latitude and longitude sense (farther south/north and east/west) with the DR track to see which option is most reasonable.

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Question 1 of 20

LAT 19° 22.3' S, LONG 6° 37.8' E

LAT 19° 20.1' S, LONG 6° 41.4' E

LAT 19° 17.6' S, LONG 6° 39.2' E

LAT 19° 15.8' S, LONG 6° 36.8' E

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Question 1 / 2066636eea28f7522a1c51aa93

Question 1 of 2066636eea28f7522a1c51aa93

Back

Question 1 of 20

66636eea28f7522a1c51aa93

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🔍 Key Concepts

💭 Think About

✅ Before You Answer

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