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Page Title: Assignment 1: 42 - 52
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1-42. You are in zone zero, longitude east at 1300 local time. What operation  should  you  perform  using the  zone  number  to  obtain  Greenwich Mean  Time? 1. Multiply 2. Add 3. Divide 4. Subtract 1-43. Which of the following letters is NOT assigned as a zone letter? 1. A 2. D 3. J 4. Y 1-44. It is the fourth day of the month. You have the 2000-2400 watch. Midway  through  the  watch  your  ship crosses  the  international  date line, eastbound. Which of the following  times  indicates  the  time you should be relieved? 1. 022345M 2. 022345Y 3. 032345M 4. 032345Y 1-45. What  is  the  proper  zone  designation for Greenwich Mean Time (GMT)? 1. HOTEL 2. MIKE 3. XRAY 4. ZULU 1-46. In writing the letter Z, a horizontal  bar  is  placed  through the letter Z to prevent it from being mistaken as the number 2. 1. True 2. False 1-47. Your ship is in time zone +5R at local time 1500. What is the Greenwich  Mean  Time? 1. 1500 2. 2000 3. 2200 4. 2400 1-48. What  causes  a  gyrocompass  to operate? 1. Attraction  exerted  by  the  Earth 2. Magnetic  properties  of  the  ship 3. True direction of the north pole 4. Gyro principle of a spinning wheel 1-49. Why is the magnetic compass used aboard ship as the standard compass rather  than  the  gyrocompass? 1. A  gyrocompass  is  affected  by deviation 2. A gyrocompass does not point to true  north 3. A magnetic compass is not affected  by  deviation 4. A magnetic compass is not affected by failure of the ship's  power  supply 1-50. What element of the magnetic compass keeps the compass bowl level, regardless of the ship movement? 1. The  binnacle 2. The  gimbals 3. The  pelorus 4. The  sphere 1-51. Your ship is in an area that has an 8° easterly variation. If your ship's true course is 080°, what magnetic  course  is  being  steered? 1. 070° 2. 072° 3. 080° 4. 080° 1-52. Magnetic  compass  error  is  a combination  of  errors  caused  by what  element(s)? 1. Electrical  current  in  the atmosphere 2. Gravitational  pull 3. Variation  and  deviation 4. Precession 5

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