2-26. 2-27. 2-28. A.    HEIGHT B.    DIRECTION C.  PERIOD D.    LENGTH Figure 2-D IN  ANSWERING  QUESTIONS  2-29  THROUGH 2-32, REFER TO FIGURE 2-D. SELECT THE WAVE PARAMETER THAT MATCHES THE DESCRIPTION  GIVEN.  RESPONSES  ARE  USED ONLY ONCE. 2-29. A measurement routinely underestimated from larger ships. 1.     A 2.     B 3.     C 4.     D What phenomenon is described as any change in wind direction by 45° or more during a 15-minute time period? 1.    Gust 2.   Squall 3.  Wind  shift 4.   Variable   wind Which of the following wind directions is computed for Foxtrot Corpin? 1.  Relative 2.  True 3.   Magnetic 4.   Variable Which of the following is NOT a factor affecting wave height? 1.  Wave  length 2.   Fetch   length 3.  Wind  speed 4.   Wind   duration 2-30. 2-31. 2-32. 2-33. 2-34. A measurement that is NOT made during a wave observation. 1.     A 2.     B 3.     C 4.     D Measured time from wave crest to wave crest, or from trough to next trough. 1.     A 2.     B 3.     C 4. D Best measured by using the gyroscope repeater on a pelorus column. 1.     A 2.     B 3.     C 4.     D When observing significant wave height, which of the following observations is most correct? 1. The average height of 100 waves 2. The average height of 50 waves 3. The average height of only the highest 50  waves 4. The average height of only the highest 1/3 of the waves Which of the following statements is true about swell waves? 1. They take on a sine-wave pattern 2. They are waves that have moved out and away from the area in which they were formed 3. They have distinct wave periods 4. Each of the above 13