Chart Navigation & Plotting · Position — Difference of Latitude
You depart 36°10.0'N and arrive 37°25.0'N. What is the difference of latitude?
- A65.0 minutes north
- B75.0 minutes (1°15.0') north✓ Correct
- C85.0 minutes north
- D1°35.0' north
Explanation
37°25.0' − 36°10.0' = 1°15.0' = 75.0' of latitude, and the destination is farther north, so the dLat is northerly. Since 1' of latitude = 1 nm, this also equals 75.0 nm of northing.
Authority: Bowditch (Pub. No. 9), difference of latitude
Practice the full Chart Navigation & Plotting bank
Free spaced-repetition quizzing across 2190 USCG exam questions — it schedules your reviews so the ones you miss come back until they stick.
Related Chart Navigation & Plotting questions
- Position — Difference of Latitude
A vessel goes from 34°10'N to 35°40'N. The difference of latitude is:
- Chart Basics
On a Mercator chart, one nautical mile is measured using the:
- Chart Basics
The principal advantage of the Mercator projection for navigation is that:
- Chart Basics
Charted depths (soundings) on a U.S. chart are referenced to which tidal datum?
- Chart Basics
Vertical clearances of bridges and overhead cables on a U.S. chart are normally referenced to:
- Distance, Speed & Time
A vessel makes good 12 knots. How far does it travel in 20 minutes?