Using gnomonic tracking chart WOXZC 5270,...

Question 1 / 2066636eea28f7522a1c51b744

Question 1 of 2066636eea28f7522a1c51b744

Using gnomonic tracking chart WOXZC 5270, determine which of the following statements about a voyage from San Francisco to San Bernardino Strait (LAT 13°00'N, LONG 125°30'E) is TRUE.

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Question 1 of 20

66636eea28f7522a1c51b744

Using gnomonic tracking chart WOXZC 5270, determine which of the following statements about a voyage from San Francisco to San Bernardino Strait (LAT 13°00'N, LONG 125°30'E) is TRUE.

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🔍 Key Concepts

• Great-circle vs. rhumb line (loxodromic) sailing on long ocean passages • How a gnomonic chart represents great-circle tracks and how distance is actually measured • Definition and location of a vertex on a great-circle track, especially for trans‑Pacific routes

💭 Think About

• Look at how the great-circle track from San Francisco toward 13°00'N, 125°30'E bends on the gnomonic chart. Does it pass north or south of key island groups like the Bonins? • Ask yourself where, in longitude, a trans‑Pacific great‑circle from the U.S. West Coast to the western Pacific typically reaches its highest latitude (the vertex). • Think about whether distance on a gnomonic chart is measured along meridians (longitude) or parallels (latitude), and at what point (tangency vs. mid‑latitude) you transfer to a Mercator chart for measuring distance.

✅ Before You Answer

• Confirm how distance is properly measured when using a gnomonic chart together with a Mercator chart for ocean routing. • Identify whether the vertex of the great‑circle track for this route lies in the Northern Hemisphere and whether your entire planned track lies to one side of it. • Check the relative position of the Bonin Islands to the plotted great‑circle track: do you actually need a composite route to avoid them, or does the normal great‑circle already pass clear?

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Question 1 of 20

Using gnomonic tracking chart WOXZC 5270, determine which of the following statements about a voyage from San Francisco to San Bernardino Strait (LAT 13°00'N, LONG 125°30'E) is TRUE.

The entire track line is west of the Northern Hemisphere vertex.

A composite sailing should be used to avoid the Bonin Islands.

You will cross the Northern Hemisphere vertex at the approximate longitude of 159°W.

Distance is measured using the length of a degree of longitude at the point of tangency.

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Question 1 / 2066636eea28f7522a1c51b744

Question 1 of 2066636eea28f7522a1c51b744

Using gnomonic tracking chart WOXZC 5270, determine which of the following statements about a voyage from San Francisco to San Bernardino Strait (LAT 13°00'N, LONG 125°30'E) is TRUE.

Back

Question 1 of 20

66636eea28f7522a1c51b744

Using gnomonic tracking chart WOXZC 5270, determine which of the following statements about a voyage from San Francisco to San Bernardino Strait (LAT 13°00'N, LONG 125°30'E) is TRUE.

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?

Quick actions

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