What is the major limitation in using the...

Question 1 / 2066636ee928f7522a1c519b6e

Question 1 of 2066636ee928f7522a1c519b6e

What is the major limitation in using the Sight Reduction Tables for Air Navigation Volume I (Pub. No. 249) for star sights?

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Question 1 of 20

66636ee928f7522a1c519b6e

What is the major limitation in using the Sight Reduction Tables for Air Navigation Volume I (Pub. No. 249) for star sights?

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🔍 Key Concepts

• Pub. No. 249, Volume 1 is specifically designed for air navigation star sights, not general nautical reduction like H.O. 229/249 Vols. 2–3. • How stars are selected and listed in Volume 1 (by latitude bands and declination, not every visible star). • The difference between a complete star catalog and a pre-selected, limited set of stars for quick use.

💭 Think About

• Ask yourself: Does Volume 1 aim to cover all possible stars or just a practical subset chosen for ease and speed for air navigators? • Consider whether the main trade‑off in an air‑navigation table is accuracy vs. speed, or completeness vs. simplicity. • Think about which of the options describes a built‑in design limitation of the tables themselves, not something about how carefully you observe.

✅ Before You Answer

• Check which option mentions a restriction on which stars you can actually use with these tables. • Verify whether air‑navigation tables are generally more accurate, less accurate, or similarly accurate compared with ship‑navigation tables for practical use. • Eliminate any choices that describe requirements (like time spacing) that are not part of how Pub. 249 Volume 1 is actually used.

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Question 1 of 20

What is the major limitation in using the Sight Reduction Tables for Air Navigation Volume I (Pub. No. 249) for star sights?

Sights must be made at even time increments to benefit from the tables.

Only first magnitude stars are tabulated.

More accuracy is needed for celestial observations on board ship than what is tabulated.

Only certain stars are included and sights must be limited to those stars.

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Question 1 / 2066636ee928f7522a1c519b6e

Question 1 of 2066636ee928f7522a1c519b6e

What is the major limitation in using the Sight Reduction Tables for Air Navigation Volume I (Pub. No. 249) for star sights?

Back

Question 1 of 20

66636ee928f7522a1c519b6e

What is the major limitation in using the Sight Reduction Tables for Air Navigation Volume I (Pub. No. 249) for star sights?

No comments yet

Be the first to share your thoughts!

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

🔍 Key Concepts

💭 Think About

✅ Before You Answer

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

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