Pass Benchmark: 70% (21/30) • Standard: USCG NMC / 46 CFR
USCG General Navigation (Set 26)
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Question 1 of 30
When using GPS without Selective Availability, you may expect your horizontal accuracy to be better than __________.
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30 MCQs #1 When using GPS without Selective Availability, you may expect your horizontal accuracy to be better than __________. #2 "Surface circulation" is another term for __________. #3 In the Northern Hemisphere, an observer at point II in illustration D014NG below, should experience a wind shift from what direction? #4 What will NOT induce errors into a Doppler sonar log? #5 On what does the operation of an aneroid barometer depend? #6 Most GPS receivers use the Doppler shift of the carrier phase to compute __________. #7 Severe tropical cyclones (hurricanes, typhoons) occur in all warm-water oceans except the __________. #8 In what order should the following sextant adjustments be made? I. Make telescope parallel to frame of sextant. II. Set horizon glass perpendicular to frame of sextant. III. Make index mirror and horizon glass parallel when index arm is set at zero. IV. Set index mirror perpendicular to frame of sextant. #9 Which is a nonadjustable error of the sextant? #10 In many areas "atoll" clouds (clouds of vertical development) are produced over small islands. These are the result of __________. #11 In order to insure that the racon signal is visible on your 3 cm radar, the __________. #12 Which change in the condition of the seas could indicate the formation of a tropical storm or hurricane several hundred miles from your location? #13 The part of a sextant mounted directly over the pivot of the index arm is the __________. #14 When the index and horizon mirrors of a properly adjusted sextant are at an angle of 45° to each other, the arc reads __________. #15 Which scale is used to estimate wind speed by observing sea conditions __________. #16 Three or four feet of the total height of a storm surge in a hurricane can be attributed to __________. #17 You are approaching Chatham Strait from the south in foggy weather. You have Coronation Island and Hazy Islands on the radar. Suddenly the radar malfunctions. You then resort to using whistle echoes to determine your distance off Coronation Island. Your stopwatch reads 16.3 seconds for the echo to be heard. How far are you off Coronation Island? #18 If you are caught in the left semicircle of a tropical storm, in the Southern Hemisphere, you should bring the wind __________. #19 The winds with the greatest effect on the set, drift, and depth of the equatorial currents are the __________. #20 Which of the four adjustable errors in the sextant causes side error? #21 In shallow water, waves that are too steep to be stable, causing the crests to move forward faster than the rest of the wave, are called __________. #22 In the Northern Hemisphere, a wind that shifts counterclockwise is a __________. #23 Barometers are calibrated at a standard temperature of __________. #24 Warm air masses will generally have __________. #25 If a hurricane several hundred miles away is moving in your general direction your barometer would __________. #26 Your vessel is on course 150°T, speed 17 knots. The apparent wind is from 40° off the starboard bow, speed 15 knots. What is the speed of the true wind? #27 What is the average speed of the movement of a hurricane following the recurvature of its track? #28 Which of these sextant errors is nonadjustable? #29 The horizon glass of a sextant is __________. #30 For a well made and well maintained sextant, the maximum value of which correction is usually so small that it can be ignored?
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