A vessel at LAT 07°05'N, LONG 81°45'W is to...

Question 1 / 2707066636eea28f7522a1c51b7b8

Question 1 of 2707066636eea28f7522a1c51b7b8

A vessel at LAT 07°05'N, LONG 81°45'W is to proceed to LAT 08°40'N, LONG 88°00'W. What are the course and distance by mid-latitude sailing?

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Question 1 of 27070

A vessel at LAT 07°05'N, LONG 81°45'W is to proceed to LAT 08°40'N, LONG 88°00'W. What are the course and distance by mid-latitude sailing?

🔍 Key Concepts

• Mid-latitude sailing formulas and when they are used • Relationship between difference of longitude (DLo), difference of latitude (DLat), and course • Use of cosine of mid-latitude when finding departure and distance

💭 Think About

• First, determine the difference in latitude and its sign: are you going north or south? • Then, calculate the difference in longitude and convert it properly to minutes of arc before using it in any formula. • Think about how to use the mid-latitude to adjust the departure: how does the cosine of latitude affect the east–west distance on the earth’s surface?

✅ Before You Answer

• Make sure you correctly compute the mid-latitude (average of the two latitudes) and use its absolute value in trigonometric functions. • Confirm your DLo is expressed in minutes of longitude, not degrees, before applying the mid-latitude sailing formulas. • After computing the distance and course, check if the direction (NW, NE, etc.) you get makes sense based on the change in latitude and longitude.

Question 1 of 27070

A vessel at LAT 07°05'N, LONG 81°45'W is to proceed to LAT 08°40'N, LONG 88°00'W. What are the course and distance by mid-latitude sailing?

285.6°T, 385.0 miles

284.3°T, 384.6 miles

283.1°T, 381.2 miles

286.8°T, 387.4 miles

Question 1 / 2707066636eea28f7522a1c51b7b8

Question 1 of 2707066636eea28f7522a1c51b7b8

A vessel at LAT 07°05'N, LONG 81°45'W is to proceed to LAT 08°40'N, LONG 88°00'W. What are the course and distance by mid-latitude sailing?

Back

Question 1 of 27070

A vessel at LAT 07°05'N, LONG 81°45'W is to proceed to LAT 08°40'N, LONG 88°00'W. What are the course and distance by mid-latitude sailing?