Navigation 3 [PDF]

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NAVIGATION 3



1. A conventional graphic representation on a plane surface, or navigable portion on the Surface of the earth. a. Chart b. Map c. globe d. sphere 2. A Graphic representation show depth of water by numerous sounding and depth contours a. Chart b. Map c. globe d. sphere 3. The most essential and reliable aids available to the navigator. a. Chart b. Map c. globe d. sphere 4. All nautical charts used for ordinary purposes of navigation are constructed on a projection; a. Azimuthal Projection c. Mercator projection b. Lambert Conformal Projection d. Stereographic 5. Chart classification according to; a. Color b. Projection



c. Scale d. Topography



6. The smallest scale of charts used for planning, fixing position at sea. a. Coast Chart c. Harbor chart b. General Chart d. Sailing chart 7. Charts intended for coastwise navigation outside outlying reefs and shoal. a. Coast Chart c. Harbor chart b. General Chart d. Sailing chart 8. Charts intended for inshore coastwise navigation where course may lie inside outlying reefs and shoals, for entering or leaving bays and harbors. a. Coast Chart c. Harbor chart b. General Chart d. Sailing chart 9. Charts intended for navigation and anchorage in harbors and small waterways. a. Coast Chart c. Harbor chart b. General Chart d. Sailing chart 10. A special charts presents oceanography and meteorology to aid navigator in selecting the quickest and safest routes. a. Bathymetric c. Synoptic Chart b. Pilot Chart d. Tidal current chart 11. A topographic chart of the bed of a body of water or part of it. a. Bathymetric chart c. Synoptic Chart b. Pilot Chart d. Tidal current chart



12. Charts on which tidal current data are depicted graphically. a. Bathymetric c. Synoptic Chart b. Pilot Chart d. Tidal current chart 13. Data and analysis are presented describe the state of the atmosphere over a large area at a given moment of time. a. Bathymetric c. Synoptic Chart b. Pilot Chart d. Weather map 14. An outline chart on a specific scale and projection, usually showing graticule and compass rose, designed to be used ancillary to standard nautical chart. a. Bathymetric c. Plotting Chart b. Pilot Chart d. Tidal current chart 15. A blank chart usually on the Mercator projection, showing only the graticule and compass rose. a. Bathymetric c. Position plotting sheet b. Pilot Chart d. Tidal current chart 16. A weekly publication giving information on changes in aids to navigation, dangers to navigation. a. Lights List c. Notice to Mariners b. Nautical Almanac d. Sailing Direction 17. A publication giving detailed information regarding lighted navigational aids and for signals. a. Lights List c. Notice to Mariners b. Nautical Almanac d. Sailing Direction 18. A descriptive book for the use of mariners containing detailed information of coastal waters, harbor facilities of a area. a. Lights List c. Notice to Mariners b. Nautical Almanac d. Sailing Direction 19. A periodical publication of astronomical data useful to and designed primarily for marine navigation. a. Lights List c. Notice to Mariners b. Nautical Almanac d. Sailing Direction 20. Table which give the predicted times and heights of high and low water for everyday in the year for a number of reference station and tidal differences. a. Lights List c. Notice to Mariners b. Nautical Almanac d. Tide tale 21. The chart symbol in the chart 5011(Symbols & Abbreviations), CLAY bottom a. C b. CA c. CL d. CY



22. a. wreck



This symbol denotes b. submerged wreck



c. ship wreck



d. obstruction



23. The chart symbol indicating that the bottom CORAL is. a. C b. CL c. CO



d. CR



24. The letters PD alongside an obstruction indicated on the chart mean; a. positively dangerous c. positive deviation b. position doubtful d. powerful disturbance 25. Compass needle derives is directive force from; a. earth’s magnetic field c. Magnetic meridian b. Geographic location d. Topographic location 26. Flinder’s bar on a magnetic compass corrects for; a. Constant deviation c. Semi Circular deviation b. Heeling error d. Quandrantal deviation 27. Deviation is caused by; a. Combination of variation and compass error b. Friction between water and hull 28. Variation is caused by a. earth’s rotation b. land masses



c. ships magnetic compass d. vessels own magnetic field



c. magnetism within the vessel d. magnetism from earth’s magnetic field



29. You can determine the variation by; a. computing difference between reading on inner and outer compass. b. Finding the least common denominator c. the mean of your deviation table d. Making an observation table of your vessel 30. The magnetic compass will have the greatest directive force at the; a. Geographical pole c. Magnetic equator b. High magnetic latitude d. Magnetic pole 31. The gyro compass is reliable up to what latitude; a. All latitudes c. Latitude 75° North or South b. Latitude 60° North or South d. Near the equator 32. Magnetic variation changes with a change in; a. Seasons b. vessel’s heading c. vessel position



d. vessel speed



33. During the ship construction, she acquired a certain permanent magnetism, when the bow will possess red polarity and stern with blue polarity, the ship is built; a. Heading North b. Heading South c. Heading East d.Heading West 34. The difference between the magnetic meridian and compass meridian is; a. compass error b. deviation c. gausing error d. variation 35. The compass rose on a chart generally indicates the; a. compass b. deviation c. drift of current



d. variation



36. Quadrantal error in a gyro compass has its greatest effect in; a. High latitudes c. North and South Headings b. Inter cardinal headings d. The equator 37. Compass heading in a liquid compass is indicated by; a. Card b. Flinders bar c. Lubbers’s line



d. Needle



38. The instrument used by navigators to determine their direction at sea is; a. Azimuth circle c. Gyro b. Compass d. Pelorus 39. The compass heading of a vessel differs from the true heading due to; a. Compass error b. Deviation c. Magnetic dip d. Variation 40. The angular deflection of the compass needle as affected by the earth’s polarity is; a. Deviation c. Parallax b. Gyroscopic inertia d. Variation 41. The most accurate deviation diagram used onboard is; a. Agonic b. Isogonic c. Napier’s diagram 42. What is the purpose of the liquid in the compass? a. Dampens oscillation on the compass card b. Reduces friction on the pivot



d. Reciprocal methods



c. both a & b d. neither a or b



43. One of the most illusive factors in the practice of navigation is known as; a. Clinometer b. Deviation of the compass c. Loxodromic curve



d. Variation



44. Basic principle of the magnetic compass a. Magnetic meridians connect points of equal magnetic variation. b. The earth’s magnetic line of force are parallel to the surface of the earth. c. Magnetic materials of the same polarity repel each other, opposite polarity attract d. Compass needle when properly compensated will lie parallel to the isogonic lines of the earth. 45. The tendency of the spinning wheel to maintain the direction of its plane of rotation in space. a. Deviation b. Precision c. rigidity d. Variation



46. By convention, the South-seeking ends of a compass magnet are colored; a. Blue b. Black c. Red d. White 47. The semi-great circle on the earth, the plane at which the magnetic needle will lie when freely suspended at any place caused by the attraction of the earth’s magnetic field is called; a. Magnetic circles c. Magnetic meridians b. Magnetic field d. Magnetic Poles 48. Permanent magnetism is found in; a. Hard iron b. Horizontal iron



c. Soft iron



d. Vertical iron



49. An angular difference between True North and Compass North a. Compass error b. Deviation c. Gyro error



d. Variation



50. The stand in which a compass is mounted. a. Bowl b. Binnacle



d. vertical stand



c. Flinders bar