This is an interactive test. Read each question and select the proper answer by clicking on the appropriate answer. If a "Y" appears, your choice is correct. If a "N" appears, more study may be in order.
4: Gyrocompass repeaters reproduce the indications of the master gyrocompass. They are __________.
N a. accurate only in the Polar regions Y b. accurate electronic servomechanisms N c. hand operated N d. accurate only if the vessel is underway 8: When you are steering on a pair of range lights and find the upper light is above the lower light you should __________.
N a. come left N b. come right Y c. continue on the present course N d. wait until the lights are no longer in a vertical line 201: What is a lighted safe water mark fitted with to aid in its identification?
N a. Red and white retroreflective material Y b. A spherical topmark N c. A sequential number N d. A red and white octagon 209: The West Wind Drift is located __________.
Y a. near 60°S N b. on each side of the Equatorial Current N c. in the North Atlantic between Greenland and Europe N d. in the South Pacific near 5°S 214: A sextant having an index error that is "on the arc" has a __________.
N a. positive correction N b. dip error Y c. negative correction N d. semidiameter error 275: Which statement concerning illustration is correct? (Soundings and heights are in meters) (D010NG )
Y a. The sunken wreck southwest of Beito Island shows the hull or superstructure above the sounding datum. N b. There is a 12-meter deep hole inside the 5-meter curve just west of Beito Island. N c. The position of the lightship is indicated by the center of the star on the symbol's mast. N d. Maury Lightship swings about her anchor on a circle with a 21-meter diameter. 320: Sometimes foreign charts are reproduced by NGA (NIMA). On such a chart, a wire-dragged, swept area may be shown in green or __________.
N a. red N b. black Y c. purple N d. yellow 426: The wind speed and direction observed from a moving vessel is known as __________.
N a. coordinate wind N b. true wind Y c. apparent wind N d. anemometer wind 430: The southeast trade winds actually blow toward the __________.
N a. southeast N b. south N c. east Y d. northwest 437: Your vessel will be docking at Chester, PA, during the evening of 22 April 1983. The chart shows a depth of 20 feet (6.1 meters) at the pier. What will be the depth of water available at 1856 EST (ZD +5)?
N a. 22.4 feet (6.8 meters) Y b. 23.4 feet (7.2 meters) N c. 24.9 feet (7.6 meters) N d. 25.7 feet (7.8 meters) 484: The needle of an aneroid barometer points to 30.05 on the dial. This indicates that the barometric pressure is __________.
Y a. 30.05 inches of mercury N b. 30.05 millimeters of mercury N c. 30.05 millibars N d. falling 510: Which aid is NOT marked on a chart with a magenta circle?
Y a. Aero light N b. Radar station N c. Radar transponder beacon N d. Radio beacon 524: An anemometer on a moving vessel measures __________.
Y a. apparent wind speed only N b. true wind speed and true wind direction N c. true wind speed only N d. apparent wind speed and true wind direction 722: Which publication would describe the explosive anchorages in the ports on the east coast of the United States?
N a. Sailing Directions N b. Pilot Rules for Inland Waters Y c. Coast Pilot N d. Notice to Mariners 745: Retrograde motion is the __________.
N a. movement of the points of intersection of the planes of the ecliptic and the equator Y b. apparent westerly motion of a planet with respect to stars N c. movement of a superior planet in its orbit about the Sun N d. movement of the celestial north pole in an elliptical pattern in space 785: An amplitude of the Sun in high latitudes __________.
N a. is most accurate before sunrise N b. is most accurate after sunset N c. should only be observed when the Sun's lower limb is above the horizon Y d. is most accurate when the Sun's center is observed on the visible horizon 867: Which ocean current is "warm" based on the latitude in which it originates and on the effect it has on climate?
Y a. Kuroshio Current N b. Benguela Current N c. Peru Current N d. California Current 870: Vessels should maintain a sharp lookout, especially during December through March, when navigating the right whale's only known calving grounds which lie off the coasts of __________.
N a. Nova Scotia N b. Maine and Massachusetts Y c. Georgia and NE Florida N d. California and Mexico 895: The ecliptic is __________.
Y a. the path the Sun appears to take among the stars N b. the path the Earth appears to take among the stars N c. a diagram of the zodiac N d. a great circle on a gnomonic chart 912: The Light List Does NOT contain information on __________.
N a. the Global Positioning System (GPS) Y b. aeronautical lights useful for marine navigation N c. radio beacon systems N d. radio direction finder calibration stations 922: How is the intensity of a light expressed in the Light Lists?
N a. Luminous range N b. Geographic range Y c. Nominal range N d. Meteorological range 983: Error may be introduced into a magnetic compass by __________.
N a. making a structural change to the vessel N b. a short circuit near the compass N c. belt buckles Y d. All of the above 1074: As the temperature for a given mass of air increases, the __________.
N a. dew point increases N b. dew point decreases N c. relative humidity increases Y d. relative humidity decreases 1081: On a voyage along the coast of France, you sight a buoy with the top marks as shown. You are required to steer __________. (D026NG )
N a. west of the buoy N b. east of the buoy Y c. south of the buoy N d. north of the buoy 1093: The Flinders bar on a magnetic compass compensates for the __________.
Y a. induced magnetism in vertical soft iron N b. induced magnetism in horizontal soft iron N c. permanent magnetism in ship's steel N d. vessel's inclination from the vertical 1155: Which aid is NOT marked on a chart with a magenta circle?
N a. Radar station Y b. Aero light N c. Radio beacon N d. Radar transponder beacon 1161: What is characteristic of an occulting light?
N a. 1 sec. flash, 2 sec. eclipse, 1 sec. flash, 5 sec. eclipse N b. 5 sec. flash, 5 sec. eclipse Y c. 4 sec. flash, 2 sec. eclipse, 3 sec. flash, 2 sec. eclipse N d. 6 sec. flash, 6 sec. eclipse 1222: On entering from seaward, a starboard side daymark will __________.
N a. show a fixed red light if lighted N b. show a Morse (A) white light N c. be square in shape Y d. have an even number if numbered 1271: Which word indicates color variation in the characteristics of a light?
N a. Opposing N b. Changing N c. Reversing Y d. Alternating 1342: An occluded front on a weather map is colored __________.
N a. blue line Y b. purple line N c. dashed blue line N d. alternate red and blue line 1454: Atmospheric pressure may be measured with a(n) __________.
N a. barograph N b. aneroid barometer N c. mercurial barometer Y d. All of the above 1464: A line of position derived from a loran reading is a section of a(n) __________.
N a. straight line N b. arc N c. parabola Y d. hyperbola 1544: The height of a tide can be increased by __________.
Y a. a storm surge N b. a high pressure area N c. the jet stream N d. a cold front 1659: The type of fog that occurs on clear nights with very light breezes and forms when the earth cools rapidly by radiation is known as __________.
Y a. radiation fog N b. frontal fog N c. convection fog N d. advection fog 1698: When a high pressure system is centered north of your vessel in the Northern Hemisphere __________.
N a. you should experience hot, moist, clear weather Y b. the wind direction is generally easterly N c. the winds should be from the southwest at your location N d. the winds should be brisk 1739: Which condition indicates that you are in a hurricane's dangerous semicircle in the Northern hemisphere?
N a. A backing wind Y b. A veering wind N c. A norther N d. A strong, gusty wind 1783: You can follow the approach of a dangerous cyclonic storm by inspecting __________.
N a. the National Weather Service Observing Handbook No.1, Marine Surface Observations Y b. a weather fax N c. the Coast Pilot or Sailing Directions N d. the sky overhead 1791: The accuracy of an azimuth circle can be checked by __________.
N a. sighting a terrestrial range in line and comparing the observed bearing against the charted bearing N b. aligning the relative bearing markings so that 000° is on the lubber's line and the line of sight passes over the center of the compass N c. ensuring that the alignment marks on the inner face of the circle are in line with those on the repeater on relative bearings of 000° and 090° Y d. comparing observed azimuths at different altitudes with computed values at the times of observation to see if the difference is constant 1809: What occurs when rising air cools to the dew point?
N a. Advection fog forms N b. Humidity decreases N c. Winds increase Y d. Clouds form 1946: When making landfall at night, you can determine if a light is a major light or an offshore buoy by __________.
N a. the intensity of the light Y b. checking the period and characteristics against the Light List N c. the color, because the buoy will have only a red or a green light N d. Any of the above can be used to identify the light. 1996: When approaching a lock entrance, the visual signal displayed when a single lock is ready for entrance is a flashing __________.
N a. red light Y b. green light N c. amber light N d. white light 2061: Fog is likely to occur when there is little difference between the dew point and the __________.
N a. relative humidity Y b. air temperature N c. barometric pressure N d. absolute humidity 2103: The description "Racon" beside an illustration on a chart would mean a __________.
N a. radar calibration beacon N b. circular radio beacon N c. radar conspicuous beacon Y d. radar transponder beacon 2127: Diagram number D037NG represents a movable dam. If there is high water and the wickets are down so that there is an unobstructed navigable pass through the dam, what light(s) will be shown at B if the lock walls and piers are not awash?
N a. No lights N b. One red light N c. Two red lights Y d. Three red lights 2164: The line connecting the points of the earth's surface where there is no dip is the __________.
N a. agonic line Y b. magnetic equator N c. isodynamic N d. isopor 2176: The illustration represents a movable dam. If there is high water and the wickets are down so that there is an unobstructed navigable pass through the dam, what light(s) will be shown at D if the lock walls and piers are not awash? (D037NG )
N a. Three red lights N b. Two red lights Y c. One red light N d. One amber light 2186: You have completed the magnetic compass adjustments on magnetic east and magnetic south. The vessel is now steady on magnetic west but the compass reads 266°. What action should be taken?
N a. Adjust the compass with the athwartships magnets until the compass reads 268°. N b. Adjust the compass with the fore-and-aft magnets until the compass reads 270°. N c. Adjust the compass with the quadrantal spheres until the compass reads 274°. Y d. Adjust the compass with the fore-and-aft magnets until the compass reads 268°. 2191: The chart indicates the variation was 3°45'E in 1988, and the annual change is increasing 6'. If you use the chart in 1991 how much variation should you apply?
N a. 3°27'E N b. 3°27'W N c. 3°45'E Y d. 4°03'E 2392: The point where the Sun is at maximum declination north or south is __________.
N a. aphelion N b. perihelion N c. an equinox Y d. a solstice 2440: You are on course 357°T and take a relative bearing of a lighthouse of 180°. What is the true bearing to the lighthouse?
N a. 003° N b. 227° Y c. 177° N d. 363° 2628: A drawbridge may use visual signals to acknowledge a vessel's request to open the draw. Which signal indicates that the draw will NOT be opened immediately?
N a. A flashing amber light Y b. A fixed red light N c. A white flag raised and lowered vertically N d. A flashing white light 2679: Under the U.S. Aids to Navigation System on the Western Rivers, a daymark on the right descending bank will __________.
Y a. be green N b. have an odd number N c. indicate the gage reading N d. have yellow retroreflective markings 2711: Information about currents on the Pacific Coast of the U. S. are found in the __________.
Y a. Tidal Current Tables N b. Nautical Almanac N c. Tide Tables N d. Ocean Current Tables 2803: Some locations maintain a zone time of -13. What are the Greenwich time and date if the zone time and date are 0152, 10 January?
Y a. 1252, 9 January N b. 1452, 9 January N c. 0052, 11 January N d. 1452, 11 January 2803: Some locations maintain a zone time of -13. What are the Greenwich time and date if the zone time and date are 0152, 10 January?
Y a. 1252, 9 January N b. 1452, 9 January N c. 0052, 11 January N d. 1452, 11 January 2869: A pillar buoy is indicated by which letter shown in the illustration? (D044NG )
N a. A N b. B Y c. C N d. D 3028: The channel under a bridge is marked with aids from the lateral system. The centerline of the channel is marked on the bridge with __________.
N a. a yellow triangle N b. three white lights N c. a black-and-white diamond Y d. a red-and-white octagon 3060: What information is NOT found in the chart title?
N a. Survey information N b. Scale Y c. Date of first edition N d. Projection 3074: ECDIS must give an alarm for which of the following cases?
N a. When the speed of a dangerous target exceeds a set limit Y b. When the specified limit for deviation from the planned route is exceeded N c. If the ship's ETA has changed beyond the set limit N d. None of the above 3095: ECDIS must have the capability to preserve the record of the track for the previous __________.
N a. 6 hours Y b. 12 hours N c. 18 hours N d. 24 hours