On 24 October your 0100 DR position is LAT...

Study

Question 1 of 2066636eea28f7522a1c51ad92

On 24 October your 0100 DR position is LAT 27°42' N, LONG 158°35' E. You are on course 085°T at a speed of 12 knots. You observed 3 celestial bodies. Determine the latitude and longitude of your 0700 running fix. Body Zone Time GHA Observed Declination Altitude Rigel 0558 238°11.2' 38°39.5' S 08°13.2' Capella 0600 238°16.1' 55°15.1' N 45°58.7' Denebola 0604 141°05.0' 33°39.8' N 14°40.6'

Back

Question 1 of 20

66636eea28f7522a1c51ad92

No comments yet

Be the first to share your thoughts!

If the question has a related picture, it will appear here.

🔍 Key Concepts

• Running fix using multiple celestial lines of position (LOPs) and advancing them along the DR track • Converting zone time to GMT, then using GHA (Greenwich Hour Angle) and declination with your assumed position to compute intercepts • Comparing the resulting fix to the DR position at 0700 to see if the answer is reasonable

💭 Think About

• First, compute your DR position at each sight time (0558, 0600, 0604) and at 0700 based on course 085°T and 12 knots. How far and in what direction have you moved? • Think about how a running fix is formed: you take an earlier LOP and advance it along your track to the later time. With three bodies, what are you really solving for at (about) 0600–0604? • After you obtain the fix time position from your three LOPs, how do you project that position ahead to 0700 on the same course and speed?

✅ Before You Answer

• Be sure you convert zone time to GMT correctly for all sights and use the correct GHA for each body • Verify that the direction and size of the intercepts (toward/away) are consistent with your assumed position near the DR track • After advancing to 0700, check that the chosen answer is close to your 0700 DR but offset in a way that matches your intercepts (not in a random direction)

👋 Hi! I'm Genie, your AI study assistant. How can I help you with this question?

Quick actions

— No credit card needed