You depart LAT 38°14'N, LONG 12°42'W, for...

Question 1 / 2066636eea28f7522a1c51b076

Question 1 of 2066636eea28f7522a1c51b076

You depart LAT 38°14'N, LONG 12°42'W, for LAT 38°14'N, LONG 46°09'W. What are the course and distance by parallel sailing?

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Question 1 of 20

66636eea28f7522a1c51b076

You depart LAT 38°14'N, LONG 12°42'W, for LAT 38°14'N, LONG 46°09'W. What are the course and distance by parallel sailing?

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🔍 Key Concepts

• Parallel sailing uses departure and middle latitude to find distance and course along a parallel • Difference of longitude (DLo) must be converted from degrees and minutes to minutes of arc and then to miles on that latitude • On a parallel of latitude, true course will be either 090°T (east) or 270°T (west) depending on direction of travel

💭 Think About

• Compare the longitudes to decide whether you are sailing east or west and choose between 090°T and 270°T • Compute the difference of longitude in minutes and relate it to the cosine of the latitude to find the departure and distance • Check that the numerical distance you compute is close to one of the options and that the course direction matches the change in longitude

✅ Before You Answer

• Verify which point is further west by comparing the W longitudes; this tells you if you are going toward increasing W or toward decreasing W • Carefully convert degrees and minutes of longitude difference to total minutes before applying the parallel sailing formula • Confirm that your computed distance is within a few miles of one of the choices, and that the associated course (east or west) matches the longitude change

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Question 1 of 20

You depart LAT 38°14'N, LONG 12°42'W, for LAT 38°14'N, LONG 46°09'W. What are the course and distance by parallel sailing?

090°T, 1576.5 miles

090°T, 2879.0 miles

270°T, 1576.5 miles

270°T, 2868.5 miles

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Question 1 / 2066636eea28f7522a1c51b076

Question 1 of 2066636eea28f7522a1c51b076

You depart LAT 38°14'N, LONG 12°42'W, for LAT 38°14'N, LONG 46°09'W. What are the course and distance by parallel sailing?

Back

Question 1 of 20

66636eea28f7522a1c51b076

You depart LAT 38°14'N, LONG 12°42'W, for LAT 38°14'N, LONG 46°09'W. What are the course and distance by parallel sailing?

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

— No credit card needed