A vessel at LAT 45° 36.0' N, LONG 11° 36.0'...

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Question 1 of 2066636eea28f7522a1c51b7d9

A vessel at LAT 45° 36.0' N, LONG 11° 36.0' W, heads for a destination at LAT 24° 16.0' N, LONG 73° 52.0' W. Determine the true course and distance by Mercator sailing.

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Question 1 of 20

66636eea28f7522a1c51b7d9

A vessel at LAT 45° 36.0' N, LONG 11° 36.0' W, heads for a destination at LAT 24° 16.0' N, LONG 73° 52.0' W. Determine the true course and distance by Mercator sailing.

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🔍 Key Concepts

• Mercator sailing uses difference of longitude and meridional parts (not just difference of latitude). • How to find meridional parts for each latitude and then compute the difference between them. • The relationship in Mercator sailing: difference of longitude, difference of meridional parts, and the true course of the rhumb line.

💭 Think About

• First find the difference of latitude and decide if it is north or south, then find the difference of longitude and decide if it is east or west. What quadrant should the course lie in? • Think about the approximate great-circle bearing from 45°N, 11°W toward 24°N, 74°W. Should the rhumb-line course be more southerly or more westerly? • After you compute the course by Mercator, ask: is the numerical value of the distance reasonable compared with the change in latitude (about 21°) at these mid‑latitudes?

✅ Before You Answer

• Be sure you are using meridional parts for both latitudes from the same set of tables or formulas, then taking their difference correctly. • Check the signs: north vs. south latitudes and east vs. west longitudes; this controls which of the four quadrants the course falls into. • After computing distance, convert degrees of course and any intermediate values carefully so your final distance is in nautical miles, and confirm that only one choice matches both your course quadrant and your distance magnitude.

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Question 1 of 2066636eea28f7522a1c51b7d9

A vessel at LAT 45° 36.0' N, LONG 11° 36.0' W, heads for a destination at LAT 24° 16.0' N, LONG 73° 52.0' W. Determine the true course and distance by Mercator sailing.

Back

Question 1 of 20

66636eea28f7522a1c51b7d9

A vessel at LAT 45° 36.0' N, LONG 11° 36.0' W, heads for a destination at LAT 24° 16.0' N, LONG 73° 52.0' W. Determine the true course and distance by Mercator 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

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