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

USCG General Navigation (Set 63)

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Question 1 of 30

In some river mouths and estuaries the incoming high-tide wave crest overtakes the preceding low-tide trough. This results in a wall of water proceeding upstream, and is called a __________.

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30 MCQs

#1 In some river mouths and estuaries the incoming high-tide wave crest overtakes the preceding low-tide trough. This results in a wall of water proceeding upstream, and is called a __________. #2 Your vessel goes aground in soft mud. You would have the best chance of refloating it on the next tide if it grounded at __________. #3 When the moon is at first quarter or third quarter phase, what type of tides will occur? #4 Neap tides occur only __________. #5 Neap tides occur when the __________. #6 The class of tide that prevails in the greatest number of important harbors on the Atlantic Coast is __________. #7 In some parts of the world there is often a slight fall in tide during the middle of the high water period. The effect is to create a longer period of stand at higher water. This special feature is called a(n) __________. #8 Which statement is TRUE concerning apogean tides? #9 Neap tides occur __________. #10 When the Moon's declination is maximum north, which of the following will occur? #11 Tropic tides are caused by the __________. #12 Which statement is TRUE concerning equatorial tides? #13 Priming of the tides occurs __________. #14 What does the term "tide" refer to? #15 Mean low water is the average height of __________. #16 Mean high water is the average height of __________. #17 The average height of the surface of the sea for all stages of the tide over a 19 year period is called __________. #18 The diurnal inequality of the tides is caused by __________. #19 A tide is called diurnal when __________. #20 The height of tide is the __________. #21 The vertical distance from the tidal datum to the level of the water is the __________. #22 The distance between the surface of the water and the tidal datum is the __________. #23 The vertical distance from the tidal datum to the level of the water is the __________. #24 The distance between the surface of the water and the tidal datum is the __________. #25 What is the definition of height of tide? #26 The height of tide is the __________. #27 The range of tide is the __________. #28 The range of tide is the __________. #29 The range of tide is the __________. #30 The difference between the heights of low and high tide is the __________.

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