Pass Benchmark: 70% (21/30) • Standard: USCG NMC / 46 CFR

USCG General Navigation (Set 60)

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Question 1 of 30

What is the major advantage of a rhumb line track?

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30 MCQs

#1 What is the major advantage of a rhumb line track? #2 When is the rhumb line distance the same as the great circle distance? #3 In which voyage, between two points, is the rhumb line distance NOT approximately the same as the great circle distance? #4 What is a characteristic of a rhumb line? #5 A great circle track provides the maximum saving in distance on __________. #6 The shortest distance between any two points on earth defines a __________. #7 What defines a great circle? #8 A great circle crosses the equator at 162°E. It will also cross the equator at what other longitude? #9 A great circle crosses the equator at 134°E. It will also cross the equator at what other longitude? #10 A great circle crosses the equator at 127°W. It will also cross the equator at what other longitude? #11 A great circle crosses the equator at 93°W. It will also cross the equator at what other longitude? #12 A great circle crosses the equator at 17°W. It will also cross the equator at what other longitude? #13 A great circle crosses the equator at 157°W. It will also cross the equator at what other longitude? #14 The distance to the nearest vertex from any point on a great circle track cannot exceed __________. #15 The vertex of a great circle track is in LONG 109°E. An eastbound vessel would cross the equator in LONG __________. #16 The upper vertex of a great circle track is in LONG 156°00'E. Sailing eastward, the great circle track will cross the equator in LONG __________. #17 The distance in longitude from the intersection of a great circle and the equator to the lower vertex is how many degrees of longitude? #18 The longitude of the upper vertex of a great circle track is 169°E. What is the longitude of the lower vertex? #19 From LAT 07°12'N, LONG 80°00'W, to LAT 47°12'S, LONG 169°18'E, the initial great circle course angle is 137.25°. How would you name this course? #20 The initial great circle course angle between LAT 23°00'S, LONG 42°00'W and LAT 34°00'S, LONG 18°00'E is 063.8°. What is the true course? #21 For navigational purposes, each great circle on the Earth has a length of __________. #22 The cold ocean current which meets the warm Gulf Stream between latitudes 40° and 43°N to form the "cold wall" is called the __________. #23 The speed of an ocean current is dependent on __________. #24 You are enroute to Jacksonville, FL, from San Juan, P.R. There is a fresh N'ly wind blowing. As you cross the axis of the Gulf Stream you would expect to encounter __________. #25 How long would a steady wind need to blow in order to create a wind driven current? #26 The current that, in many respects, is similar to the Gulf Stream is the __________. #27 You are on a voyage from New Orleans to Boston and navigating off the Florida coast. You will get the greatest benefit from the Gulf Stream if you navigate __________. #28 Ocean currents are well defined and __________. #29 The two most effective generating forces of surface ocean currents are __________. #30 The approximate mean position of the axis of the Gulf Stream east of Palm Beach, FL, is __________.

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