Pass Benchmark: 70% (21/30) • Standard: USCG NMC / 46 CFR
USCG General Navigation (Set 64)
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Question 1 of 30
Magnetic variation changes with a change in __________.
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30 MCQs #1 Magnetic variation changes with a change in __________. #2 The difference between the heights of low and high tide is the __________. #3 The difference between the heights of low and high tide is the __________. #4 The difference between the heights of low and high tide is the __________. #5 The following boats are approaching a lock. Which has priority for locking? #6 The range of tide is the __________. #7 When there are small differences between the heights of two successive high tides or two low tides, in a tidal day, the tides are called __________. #8 Spring tides are tides that __________. #9 The point where the vertical rise or fall of tide has stopped is referred to as __________. #10 "Stand" of the tide is that time when __________. #11 The sidereal day begins when the __________. #12 The period at high or low tide during which there is no change in the height of the water is called the __________. #13 You are outbound in a buoyed channel on course 015°T. You sight a white light showing a Morse (A) characteristic bearing 359° relative. For safety, you should __________. #14 The refraction correction table given in the Nautical Almanac is based on a standard or average atmospheric density with a temperature of 50°F (10°C) and atmospheric pressure of __________. #15 You are underway on course 328°T when you sight a buoy broad on your port bow. You are in the best navigable water if the buoy __________. #16 You are on course 090°T when you sight a flashing white light with a characteristic of VQ(9)10s. You immediately change course to 030°T. After one hour, you sight another flashing white light with the characteristic of VQ. You must pass well __________. #17 You are underway on course 127°T. You sight a buoy with the topmarks shown in illustration D025NG below, bearing two points on the starboard bow. Which action must be taken? #18 While proceeding along the Mediterranean coast of Spain, you sight the black and yellow buoy shown in illustration D020NG below. Your course is 039°T, and the buoy bears 053°T. What action should you take? #19 You wish to measure the distance on a Mercator chart between a point in latitude 42°30'N and a point in latitude 40°30'N. To measure 30 miles at a time you should set the points of the dividers at __________. #20 You wish to measure the distance on a Mercator chart between a point in latitude 43°30'N and a point in latitude 40°30'N. To measure 30 miles at a time, you should set the points of the dividers at __________. #21 To measure distance on a Mercator chart between the parallels of LAT 34°30'N and LAT 31°30'N, which 30 mile scale should be used? #22 Civil twilight occurs at 0558 zone time on 30 December. Your DR position at that time is LAT 15°02'N, LONG 46°02'W. Which statement concerning the planets available for morning sights is TRUE? #23 Civil twilight begins at 1910 zone time on 20 July. Your DR position at that time is LAT 22°16'N, LONG 150°06'W. Which statement concerning the planets available for evening sights is TRUE? #24 The chart indicates the variation was 3°45'W in 1988, and the annual change is decreasing 6'. If you use the chart in 1991 how much variation should you apply? #25 The chart indicates the variation was 3°45'W in 1988, and the annual change is increasing 6'. If you use the chart in 1991 how much variation should you apply? #26 The chart indicates the variation was 3°45'E in 1988, and the annual change is increasing 6'. If you use the chart in 1991 how much variation should you apply? #27 The points on the earth's surface where the magnetic dip is 90° are __________. #28 Your radar has a beam width of 2°. The radar gyro bearing of the right tangent of an island is 316°. The gyro error is 1°E. Which true bearing should be plotted on the chart? #29 While underway vessels equipped with an automatic identification system (AIS) are required to transmit specific information at varying intervals. What information contained in a class A unit broadcast is only required to be transmitted every six minutes? #30 You are underway on course 050°T and your maximum speed is 12 knots. The eye of a hurricane bears 080°T, 100 miles from your position. The hurricane is moving towards 265°T at 22 knots. What course should you steer at 12 knots to have the maximum CPA?
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