On 26 July your 1030 ZT DR position is LAT...

On 26 July your 1030 ZT DR position is LAT...

Question 1 of 2707066636eea28f7522a1c51ada8

On 26 July your 1030 ZT DR position is LAT 18°25'N, LONG 51°15'W. You are on course 231°T, speed 15 knots. Determine your 1200 position using the following observations of the Sun.

Question 1 of 27070

Q

On 26 July your 1030 ZT DR position is LAT 18°25'N, LONG 51°15'W. You are on course 231°T, speed 15 knots. Determine your 1200 position using the following observations of the Sun.

🔍 Key Concepts

• Dead reckoning (DR) position vs. observed position from celestial sights • Using course and speed to advance a line of position (LOP) to a common time • Effect of run from 1030 to 1200 on both latitude and longitude

💭 Think About

• From 1030 to 1200, how many minutes of time elapse, and what distance do you travel at 15 knots in that interval? • In what general direction (quadrant) does course 231°T take you from your DR position, and what does that imply about whether your latitude and longitude should be increasing or decreasing? • When you apply your celestial intercept(s), are you moving your DR toward or away from the geographic position (GP) of the Sun?

✅ Before You Answer

• Be sure your run from DR (distance and direction) is correct before touching the sight reductions • Check that your final latitude and longitude change makes sense for a southwesterly course in the western Atlantic • Verify that the answer you pick is consistent in both magnitude of movement (nautical miles vs. degrees) and direction of movement (north/south, east/west) over 1.5 hours at 15 knots