期英语部分题目答案.doc

1.You may find the time of slack water after low water in a certain port from ______. A. mFAG. B. Tide tables. C. Notices to mariners. D. Table of azimuth. KEY: B 2.Information on the operating times and characteristics of foreign radiobeacons can be found in which publication? ______. A. List of Lights B. Coast Pilot C. Sailing Directions D. List of Radiobeacons KEY: A 3.A line of position from a celestial observation is a segment of a ______. A. circle of equal altitude B. parallel of declination C. parallel of altitude D. vertical circle KEY: A 4.What defines a great circle? A. A curved line drawn on a Mercator Chart B. A course line that inscribes a loxodromic curve C. The shortest distance between any two points on the earth D. The smallest circle that can be drawn on the face of a sphere KEY: C 5.Which aid is NOT marked on a chart with a magenta circle? A. Aero light B. Radar station C. Radar transponder beacon D. Radiobeacon KEY: A 6.Charted depth is the ______. A. vertical distance from the tidal datum to the ocean bottom plus the height of the tide B. vertical distance from the tidal datum to the ocean bottom C. average height of water over a specified period of time D. average height of all low waters at a place KEY: B 7. The changes in the channel’s sands and buoys on this coast are ______ this chart cannot be considered as a safe guide of the channel. A. Frequent. B. So frequent. C. Frequent that. D. So frequent that. KEY: D 8.While steaming slowly in the harbor，no ship is ______ to exceed the speed limited． A. assumed B. appreciated C. promised D. permitted． KEY: D 9.The mariner must be the final judge of the reliance he can place on the information given in the admiralty charts and other publications, since they _______. A.May always be complete and up-to-date B.May not always be complete and up-to-date C.May sometimes be complete and up-to-date D.May not sometimes be compl