National Maritime Center

Transcription

1 National Maritime Center Providing Credentials to Mariners Q304 Navigation General-Great Lakes and Inland (Sample Examination) Page 1 of 19

2 Choose the best answer to the following Multiple Choice questions. 1. You desire to make good a true course of 038. The variation is 5 E, magnetic compass deviation is 4 W, and gyrocompass error is 4 W. A southeasterly wind produces a 4 leeway. What is the course to steer per standard magnetic compass to make the true course good? o (A) 047 psc (B) 041 psc o (C) 043 psc o (D) 033 psc 2. The National Oceanic and Atmospheric Administration publishes which item? o (A) Light Lists (B) Coast Pilots o (C) pilot charts o (D) Sailing Directions 3. From which type of cloud can a tornado or waterspout develop? o (A) Cirrus o (B) Altostratus o (C) Nimbostratus (D) Cumulonimbus 4. While on a course of 349 T, a light bears 13 on the starboard bow at a distance of 10.8 miles. What course should you steer to pass 2.5 miles abeam of the light leaving it to starboard? o (A) 346 T o (B) 352 T (C) 349 T o (D) 355 T Page 2 of 19

3 5. You are entering an east coast port and see a buoy with a yellow triangle painted on it. What does the symbol indicate? (A) You are in the vicinity of the ICW o (B) The buoy designates a sharp turn in the channel o (C) The buoy is a special mark o (D) The buoy is off station 6. Two beacons form a range in the direction of T. The range is seen in line from your vessel bearing 223 per gyrocompass. The variation in the area is 4 E. What is the error of your gyrocompass? (A) 1.5 W o (B) 2.5 W o (C) 5.5 W o (D) 2.5 E 7. The direction in which a vessel should be steered between two points is the. (A) course o (B) course over the ground o (C) heading o (D) bearing 8. Which statement about gyrocompass error is TRUE? o (A) Any error shown by a gyro repeater will be the same as the error of the master compass. o (B) The sign (E or W) of the error will change with different headings of the ship. o (C) Any error will remain constant unless the compass is stopped and restarted. (D) The amount of the error and the sign will generally be the same on all headings. 9. Which describes the result when you turn on the fast time constant (differentiator) control of a radar? o (A) Enhanced weak target echoes and brighten them on the PPI o (B) Only suppresses weak targets to a limited distance from the ship (sea clutter) o (C) Reduces the beam width to provide a map-like presentation for navigation (D) Reduced clutter over the entire PPI by shortening the echoes Page 3 of 19

4 10. How many high waters usually occur each day on the East Coast of the United States? o (A) One (B) Two o (C) Three o (D) Four 11. The average height of the surface of the sea for all stages of the tide over a 19 year period is called. o (A) half-tide level o (B) mean low water o (C) mean high water (D) mean sea level 12. What do red sectors of navigation lights warn mariners of? o (A) Heavily trafficked areas (B) Shoals or nearby land o (C) Recently sunken vessels o (D) Floating debris 13. While passing through Memphis, the weather report on the TV news indicates that a cold front is crossing western Kentucky and Tennessee. Tomorrow's weather will be dominated by a high pressure area. What weather should you expect tomorrow? o (A) Low overcast; mild temperatures with light, steady rain or drizzle o (B) Scattered clouds with light, southeasterly winds; high humidity and possibly fog (C) Moderate winds from the northwest, clear visibility and cooler temperatures o (D) Light, southerly winds; high humidity and possibly fog 14. How do preferred channel buoys indicate the preferred channel to transit? o (A) The location of the buoy in the channel junction o (B) The buoy's light rhythms (C) The color of their top band o (D) Odd or even numbers Page 4 of 19

5 15. You are approaching Chatham Strait from the south in foggy weather. You have Coronation Island and Hazy Islands on the radar. Suddenly the radar malfunctions. You then resort to using whistle echoes to determine your distance off Coronation Island. Your stopwatch reads 16.3 seconds for the echo to be heard. How far are you off Coronation Island? o (A) 1.0 mile (B) 1.5 miles o (C) 2.0 miles o (D) 2.5 miles 16. The difference between the heights of low and high tide is the. o (A) depth o (B) period (C) range o (D) distance 17. A daymark used to indicate the safe water in a channel will have which of the shapes shown in illustration D045NG below? o (A) A o (B) B (C) C o (D) D 18. A section of the river that is narrower than usual and is often navigable from bank to bank is a. o (A) navigable pass o (B) stabilized channel o (C) slough (D) chute 19. When using GPS, how many theoretical position lines are required for a three-dimensional fix? o (A) 1 o (B) 2 o (C) 3 (D) 4 Page 5 of 19

6 20. What is a system of reservoirs and connecting tubes in a gyro compass called? o (A) The gyrotron o (B) The rotor (C) The mercury ballistics o (D) The spider element 21. Under the U.S. Aids to Navigation System on the Western Rivers, which is TRUE of a preferred channel buoy? o (A) It shall be vertically-striped red and white o (B) It shall be solid green o (C) It shall be solid red (D) It shall be horizontally-banded red and green 22. A cardinal mark showing an uninterrupted quick-flashing white light indicates the deepest water is located in which quadrant? o (A) The west quadrant of the mark (B) The north quadrant of the mark o (C) The east quadrant of the mark o (D) The south quadrant of the mark 23. You have another ship overtaking you close aboard to starboard. You have 3 radar targets bearing 090 relative at ranges of.5 mile, 1 mile, and 1.5 miles. Which term is given to these unwanted echoes? o (A) Indirect echoes o (B) Spoking (C) Multiple echoes o (D) Side-lobe echoes 24. Pressure gradient is a measure of. o (A) pressure difference over time (B) pressure difference over horizontal distance o (C) a high-pressure area o (D) vertical pressure variation Page 6 of 19

7 25. What agency of the U.S. Government issues charts of U.S. waters and Coast Pilots? o (A) U.S. Naval Observatory o (B) U.S. Coast Guard (C) National Oceanic and Atmospheric Administration o (D) National Imagery and Mapping Agency 26. You sight a buoy fitted with a double-sphere topmark. If sighted at night, what color and light sequence would you expect to see? o (A) A quick-flashing red light o (B) A quick-flashing green light (C) A flashing white light showing a group of two flashes o (D) A flashing red light showing a group of three flashes 27. Which type of cloud is among the most dependable for giving an indication of an approaching weather system? (A) Altostratus o (B) Nimbus o (C) Cumulus o (D) Cumulostratus 28. Under the IALA Buoyage Systems, which is TRUE of safe water marks? o (A) They must show a composite group-flashing, Fl(2 + 1), green light o (B) They may show a quick-flashing, Q(9)15s, white light o (C) They may show a composite group-flashing, Fl(2 + 1), red light (D) They may show a white Morse (A) light 29. Under the U.S. Aids to Navigation System, a special mark possesses which of the following characteristics? (A) May show a yellow light with a flashing rhythm o (B) May show a light with the Morse code "A" rhythm o (C) Must be lighted with a fixed or flashing white light o (D) Must be lighted with a yellow isophase light Page 7 of 19

8 30. Which is TRUE concerning the speed of sound in water? o (A) It is approximately 1.5 times its speed in air o (B) It is approximately 2.5 times its speed in air o (C) It is approximately 3.5 times its speed in air (D) It is approximately 4.5 times its speed in air 31. The Daily Memorandum contains which information? (A) The latest navigational warnings o (B) Active weather disturbances such as hurricanes or tropical storms o (C) Water levels at river ports where run-off affects tidal heights o (D) Scheduled vessel arrivals and departures for a 24-hour period 32. Buoys are marked with reflective material to assist in their detection by searchlight. Which statement is TRUE? o (A) All reflective material is white because it is the most visible at night. (B) A preferred-channel buoy displays either red or green reflective material to agree with the top band of color. o (C) A special-purpose mark will display either red or green reflective material to agree with its shape. o (D) A safe-water buoy will display red and white vertical stripes of reflective material. 33. On 27 April 1983, at 1105 DST (ZD +4), what will be the predicted height of tide at Falkner Island, CT? (A) 5.3 feet (1.6 m) o (B) 5.6 feet (1.7 m) o (C) 6.2 feet (1.9 m) o (D) 6.8 feet (2.7 m) 34. Which term is used to express the maximum distance at which a light may be seen under existing visibility conditions? o (A) Geographic range (B) Luminous range o (C) Nominal range o (D) Charted range Page 8 of 19

9 35. How many fixed objects are needed to plot a running fix? o (A) None (B) One o (C) Two o (D) Three 36. When does a Doppler speed log indicate speed over ground? (A) When senseing the bottom in depths of less than 600 feet o (B) The unit can only speed over ground when there is no current o (C) At all times o (D) When the unit is in the volume reverberation mode 37. When adjusting a magnetic compass for error, which is TRUE concerning the deviation table? (A) Construct the table after adjusting the fore-and-aft permanent magnets o (B) Construct the deviation table before correcting for any deviation o (C) Construct the deviation table before the quadrantal correctors are placed on the compass o (D) Construct the deviation table after correcting for variation 38. Illustration D036NG below represents a fixed C of E lock and dam. What navigational light(s) is(are) exhibited at the position indicated by the letter D? o (A) One red light (B) Two green lights o (C) No light o (D) Three green lights 39. In the IALA Buoyage System, what do buoys with alternating red and green horizontal bands indicate? (A) The preferred channel o (B) An isolated danger o (C) Fishing areas o (D) Spoil grounds Page 9 of 19

10 40. Which meteorological feature controls the climate of the Gulf and the Gulf Coast area during late spring and summer? (A) The Bermuda High o (B) Tropical cyclones o (C) The doldrums o (D) The horse latitudes 41. The predicted time that the flood begins at the entrance to Delaware Bay is You are anchored off Chestnut St. in Philadelphia. If you get underway bound for sea at 1300 and turn for 13 knots, at what point will you lose the flood current? o (A) Mile 52 o (B) Marcus Hook (C) Billingsport o (D) New Castle 42. According to Buys Ballot's law, when an observer in the Northern Hemisphere experiences a northeast wind, where is the center of low pressure located? o (A) West-Southwest o (B) Northwest o (C) Northeast (D) South-Southeast 43. Which device maintains a continuous graphic record of the heading of the vessel? o (A) The AIS system o (B) The fathometer (C) The course recorder o (D) The auto pilot 44. Which type of precipitation occurs only in thunderstorms with strong convection currents that convey raindrops above and below the freezing level? (A) Hail o (B) Sleet o (C) Freezing rain o (D) Rime Page 10 of 19

11 45. By convention, the Earth's south magnetic pole is which color? o (A) White o (B) Black o (C) Blue (D) Red 46. You are in charge of a power-driven vessel crossing a river on the Western Rivers. You must keep out of the way of. o (A) a power-driven vessel ascending the river o (B) a vessel restricted in its ability to maneuver crossing the river o (C) a sail vessel descending the river (D) All of the above 47. How may a spherical buoy be identified? o (A) It may be red o (B) It may be green o (C) It may be numbered (D) It may be lettered 48. Your vessel is proceeding up a channel, and you see a pair of range lights that are in line ahead. The chart indicates that the direction of this pair of lights is 311 T, and the variation is 8 E. If the heading of your vessel at the time of the sighting is 305 per standard magnetic compass, what is the correct deviation? o (A) 2 E (B) 2 W o (C) 6 E o (D) 6 W 49. While on a course of 159 T, a light bears 11 on the starboard bow at a distance of 10.6 miles. What course should you steer to pass 2 miles abeam of the light leaving it to starboard? o (A) 163 T o (B) 171 T o (C) 167 T (D) 159 T Page 11 of 19

12 50. Which information is NOT required to be posted in or near the wheelhouse? (A) A diagram of advance and transfer for turns of 30, 60, 90 and 120 at full speed with maximum rudder and constant power o (B) Stopping time and distance from full speed while maintaining course with minimum rudder o (C) For vessels with a fixed propeller, a table of shaft RPMs for a representative range of speeds o (D) Operating instructions for change-over procedures for remote steering gear systems 51. The light characteristic of flashing is used in the Aids to Navigation System on the Western Rivers. Which example is required to utilize this characteristic? o (A) Preferred channel buoys o (B) Lights marking the left descending bank o (C) Daymarks with no lateral significance (D) Lights marking the right descending bank 52. You are on course 222 T and take a relative bearing of a lighthouse of 025. What is the true bearing to the lighthouse? o (A) 315 (B) 247 o (C) 335 o (D) You are proceeding up a channel at night. It is marked by a range which bears 185 T. You steady up on a compass course of 180 with the range in line dead ahead. This indicates that you(r). (A) compass has some easterly error o (B) must come right to get on the range o (C) are being affected by a southerly current o (D) course is in error Page 12 of 19

13 54. The true course between two points is 078. Your gyrocompass has an error of 2 E. You make an allowance of 3 leeway for a north wind. What gyro course should be steered to make the true course good? o (A) 077 pgc o (B) 075 pgc o (C) 079 pgc (D) 073 pgc 55. Geographic range is the maximum distance at which a light may be seen under which conditions? o (A) Existing visibility conditions, limited only by the curvature of the Earth o (B) Existing visibility conditions, limited only by the intensity of the light o (C) Perfect visibility conditions, limited only by interference from background lighting (D) Perfect visibility conditions, limited only by the curvature of the Earth 56. How many slack tidal currents usually occur each day on the east coast of the United States? o (A) One o (B) Two o (C) Three (D) Four 57. Information markers, when lighted, will display which color light? (A) White lights o (B) Red lights o (C) Green lights o (D) Yellow lights 58. If the current and wind are in the same direction, what does the sea surface represent concern the true wind speed? o (A) It appears higher than actually exists o (B) The appearance of the sea surface does not change o (C) It appears at the correct speed (D) It appears less than actually exists Page 13 of 19

14 59. You take a bearing of 086 of a lighthouse. What bearing of another object would give the best fix? (A) 000 o (B) 066 o (C) 112 o (D) At which location is the value of sixty nautical miles per degree of geodetic latitude most correct? o (A) At either of the poles o (B) The equator (C) At latitude 45 o (D) At all latitudes 61. On a transpacific voyage, you receive a message from your vessel's operators saying that your vessel has been consigned to voluntary Naval Cooperation and Guidance for Shipping (NCAGS). Where can further information be located? o (A) the International Code of Signals (PUB 102) o (B) The Light List (C) Radio Aids to Navigation (PUB 117) o (D) the Coast Pilot 62. What will be the velocity of the tidal current south of Doubling Point, ME, at 1357 EST (ZD +5) on 3 April 1983? o (A) 0.9 knot o (B) 1.3 knots (C) 2.0 knots o (D) 2.6 knots 63. Prior to reading an aneroid barometer, why should you tap the face lightly with your finger? o (A) To contract and expand the glass face o (B) To demagnetize the metal elements o (C) To expose any loose connections (D) To bring the pointer to its true position Page 14 of 19

15 64. What color lights do lighted information markers display? (A) White lights o (B) Green lights o (C) Yellow lights o (D) Red lights 65. On an Army Corps of Engineers navigation map, how is each mile A.H.P. on the Lower Mississippi River marked? o (A) A dashed red line o (B) A navigation light (C) A black dot o (D) A number showing mileage only 66. Which of the Nautical Texts is/are published by the U.S. Coast Guard? o (A) Radio Navigational Aids o (B) U.S. Coast Pilots (C) Light Lists o (D) All of the above 67. In illustration D039NG below, what type of cloud is indicated by the number four? o (A) Cumulus o (B) Altocumulus (C) Altostratus o (D) Cirrostratus 68. ( ) What will be the time after 1000 EST (ZD +5), on 4 March 1983, that the height of the tide at City Island, NY, will be 2.4 feet? (A) 1228 o (B) 1240 o (C) 1244 o (D) 1248 Page 15 of 19

16 69. How can you follow the approach of a dangerous cyclonic storm? o o (A) Review the Coast Pilot or Sailing Directions (B) Utilizing the National Weather Service Observing Handbook No.1, Marine Surface Observations (C) By a newspaper, a weather map, a weather fax, or a weather forecast o (D) By monitoring the change in the sea temperature 70. What is published by the U.S. Coast Guard? o (A) Tide Tables o (B) Nautical Charts (C) Light List o (D) U.S. Coast Pilot Page 16 of 19

17 National Maritime Center Providing Credentials to Mariners D036NG 5/23/2016 Adapted for testing purposes only Further reproduction prohibited without permission Page 17 of 19

18 National Maritime Center Providing Credentials to Mariners D039NG 5/23/2016 Adapted for testing purposes only Further reproduction prohibited without permission Page 18 of 19

19 National Maritime Center Providing Credentials to Mariners D045NG 5/23/2016 Adapted for testing purposes only Further reproduction prohibited without permission Page 19 of 19