On 4 September your 1813 zone time DR...

Question 1 of 2707066636eea28f7522a1c51ae1f

On 4 September your 1813 zone time DR position is LAT 24° 18.0' S, LONG 95° 16.0' E. Considering their magnitude, azimuth, and altitude, which group includes the three stars best suited for a fix at star time?

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Question 1 of 27070

🔍 Key Concepts

• Star selection for evening/morning fix (separation in azimuth and altitude) • Importance of magnitude (brightness) for easy sight-taking • Using LHA Aries / star ID to judge what’s above the horizon at a given DR position, date, and time

💭 Think About

• Think about which group has stars that will likely be well spread around the sky in azimuth, not bunched in one area. • Consider which stars are bright, well-known navigation stars that are commonly used together for a 3-star fix. • At the stated latitude in the Southern Hemisphere, which group is most likely to give you good altitude angles (not too high, not too low)?

✅ Before You Answer

• Verify that the chosen stars are all above the horizon and not too close to the zenith or horizon at that date/time/position. • Check that the stars in the group are widely separated in azimuth (ideally 60°–120° apart). • Confirm that the stars are bright navigation stars (low magnitude numbers) typically included on standard star finder templates.