Pass Benchmark: 70% (21/30) • Standard: USCG NMC / 46 CFR
USCG General Navigation (Set 70)
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Question 1 of 30
A great circle crosses the equator at 157°W. It will also cross the equator at what other longitude?
Browse Questions in Set 70
30 MCQs #1 A great circle crosses the equator at 157°W. It will also cross the equator at what other longitude? #2 The vertex of a great circle track is in LONG 109°E. An eastbound vessel would cross the equator in LONG __________. #3 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 __________. #4 The longitude of the upper vertex of a great circle track is 169°E. What is the longitude of the lower vertex? #5 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? #6 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? #7 The cold ocean current which meets the warm Gulf Stream between latitudes 40° and 43°N to form the "cold wall" is called the __________. #8 The steady current circling the globe at about 60°S is the __________. #9 When the declination of the Moon is 0°12.5'S, you can expect some tidal currents in Gulf Coast ports to __________. #10 Under the IALA-A Buoyage System, when entering from seaward, a buoy indicating the preferred channel is to starboard may have which of the following? #11 While steaming on course 280°T, you sight a buoy showing a very quick flashing (VQ) white light well to port. Maintaining course, you sight another buoy showing a quick flashing (Q) white light. How should you pass? #12 Which of the following is a characteristic of a lighted cardinal mark? #13 While proceeding along the Norwegian coast on course 039°T, you sight the black-yellow-black banded buoy shown in illustration D021NG below, bearing 053°T. What action should you take? #14 You are underway on course 142°T when you sight a buoy bearing 105°T. The buoy's white light has a characteristic of continuous very-quick flashing. What should you do to ensure that your vessel remains in the best navigable water? #15 You are underway in the North Sea on course 216°T when you sight a buoy bearing 021° relative. Under the IALA Buoyage System, you are in the best navigable water if the buoy has which of the following characteristics? #16 Sometimes foreign charts are reproduced by NGA. On such a chart, a wire-dragged, swept area may be shown in green or __________. #17 Which statement is TRUE for an unlighted, red and green, horizontally-banded buoys with the topmost band red? #18 Under the IALA cardinal system, a mark with a quick light showing 9 flashes every 15 seconds indicates that the safest water is on which side of the mark? #19 On approaching the English Channel on course 080°T, you note the symbol YBY near a charted buoy. How should you pass this buoy? #20 You are heading out to sea in a buoyed channel and see a quick flashing green light on a buoy ahead of you. In U.S. waters, you should leave the buoy __________. #21 While preparing to enter a Brazilian port, you see ahead a red and green horizontally-striped buoy. The upper band is red. What action should you take? #22 You sight a spar buoy with the topmark shown in illustration D027NG below. You must take which of the following actions? #23 Under the U.S. Aids to Navigation System on the Western Rivers, a preferred channel buoy is __________. #24 Which buoy will NOT display white retro-reflective material? #25 In the IALA Buoyage System, preferred-channel-to-port or preferred-channel-to-starboard buoys, when fitted with lights, will show a __________. #26 Under the IALA Buoyage System, which topmark shown in illustration D023NG below will be displayed on a safe watermark? #27 Aids to navigation marking the intra-coastal waterway can be identified by __________. #28 A large automated navigational buoy, such as those that have replaced some lightships, would be shown on a chart by which symbol in illustration D015NG below? #29 Which of the Nautical Texts is/are published by the U.S. Coast Guard? #30 Civil twilight starts at 1812 zone time on 26 August, Your DR position at that time is LAT 21°06'S, LONG 14°56' W. Which statement concerning the planets available for evening sights is TRUE?
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