期到.doc

49 期到 52 期是同学们一起手打的。有些题没有答案, 这些请自行去寻找吧。第 52期 903 1. Where would you find information about the time of high tide ata specific location ona particular day of the year? A. Tide Tables B. Tidal Current Tables C. Coast Pilot D. Nautical Almanac A2. For details of these and other lights the larger scale charts and Admiralty Lists should be__ A. considered B. consulted C. concluded D. commanded B3. The error in the measurement of the altitude ofa celestial body, caused by refraction, increases as the ______. A. horizontal parallax decreases B. observer ’s height above sea level increases C. humidity of the atmosphere decreases D. altitude of the body decreases D4. pass rose ona nautical chart indicates both variation and ______. A. deviation B. annual rate of variation change C. precession D. compass error KEY: B5. The short-long dashed, magenta lines parallel to York River Entrance Channel mark _____ A. fish trap areas B. naval exercise areas C. underwater cables D. mended track lines A important point to note when you open a navigation chart is to note whether the depths are _____ A in meter or fathom B in foot or kilometer Cby meter or fathom Dby foot or kilometer A7. When should voyage planning be done? A. During the sailing B. Prior the sailing C. After sailing D. Before the pilot is leaving 答案: B什么时候需要做航行计划?在航行以前 8. The Experimental Lighthouse-buoy has no navigational significance and may be removed at will . The above sentence means ______. A. It's ofno use for navigation and would be removed with notice B. It's useful in navigation and may be removed without notice C. It's helpless in navigation and may be removed without notice D. It's helpful in navigation and may be removed without notice KEY: C9. Owing to old data of the survey the positions and number of the beacons shown on this chart are not tobe______. A. considered B. insured C. relied upon D. suspected KEY: C10. ______ isa full nautical record ofa ship's voyage , written up at the end of each watch