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.
27: Spring tides are tides that __________.
Y a. have lows lower than normal and highs higher than normal N b. have lows higher than normal and highs lower than normal N c. are unpredictable N d. occur in the spring of the year 83: All Loran-C transmitting stations are equipped with cesium frequency standards which permit __________.
N a. every station in one chain to transmit at the same time Y b. each station to transmit without reference to another station N c. on-line transmission of single-line transmitters at the same time N d. each station to only depend on the master for synchronization and signal ratio 215: The equation of time is 12m 00s and the mean Sun is ahead of the apparent Sun. If you are on the central meridian of your time zone, at what zone time will the apparent Sun cross the meridian?
N a. 1148 N b. 1200 Y c. 1212 N d. It cannot be determined from the information given. 297: The tides in Boston Harbor generally __________.
N a. are diurnal in nature N b. have their variations caused by the changing declination of the Moon Y c. have a greater range than the tides in Gulf Coast ports N d. All of the above 371: Which buoy may be odd numbered?
N a. Mid-channel buoy N b. Unlighted nun buoy Y c. Lighted green buoy N d. All of the above 411: When entering from seaward, a buoy displaying a single-flashing red light would indicate __________.
N a. a junction with the preferred channel to the left N b. a sharp turn in the channel to the right Y c. the starboard side of the channel N d. a wreck to be left on the vessel's port side 562: You wish to measure the distance on a Mercator chart between a point in latitude 42°30'N and a point in latitude 40°30'N. To measure 30 miles at a time you should set the points of the dividers at __________.
Y a. 41°15' and 41°45' N b. 41°45' and 42°15' N c. 42°15' and 42°45' N d. 42°00' and 42°30' 563: Your radar has a beam width of 2°. The radar gyro bearing of the right tangent of an island is 316°. The gyro error is 1°E. Which true bearing should be plotted on the chart?
N a. 313° N b. 314° Y c. 316° N d. 317° 647: You will enter Argentia, Newfoundland, at 1200 on 5 October 1983, while keeping zone description +3 on the ship's clocks. What will be the height of tide at this time (based on the Canadian chart datum)?
N a. 0.5 feet N b. 1.2 feet Y c. 2.1 feet N d. 3.4 feet 726: Atmospheric pressure at sea level is equal to __________.
N a. 14.7 pounds per square inch N b. 29.92 inches of mercury N c. 1013.25 millibars Y d. All of the above 778: The navigable semicircle of a hurricane in the Northern Hemisphere is that area of the storm measured __________.
N a. from true north clockwise to 180°T N b. from true north counterclockwise to 180°T N c. from the bow counterclockwise to 180° relative Y d. from the direction of the storm's movement counterclockwise 180° 784: Variation is the angular measurement between __________.
N a. compass north and magnetic north N b. compass north and true north Y c. magnetic meridian and the geographic meridian N d. your vessel's heading and the magnetic meridian 807: The approximate mean position of the axis of the Gulf Stream east of Palm Beach, FL, is __________.
N a. 35 nautical miles N b. 25 nautical miles Y c. 15 nautical miles N d. 5 nautical miles 907: In which month will the equatorial counter current be strongest?
N a. January N b. April Y c. August N d. October 919: You are plotting a running fix in an area where there is a determinable current. How should this current be treated in determining the position?
N a. The drift should be added to the ship's speed. Y b. The course and speed made good should be determined and used to advance the LOP. N c. The current should be ignored. N d. The set should be applied to the second bearing. 929: Which error is NOT included in the term "current" when used in relation to a fix?
N a. Poor steering N b. Leeway Y c. Known compass error N d. Ocean currents 931: Under the IALA-B Buoyage System, when entering from seaward, a buoy that should be left to port will be __________.
N a. black N b. red Y c. green N d. yellow 1029: Which would be the subject of a NAVAREA warning?
N a. A drifting buoy sighted in mid-ocean N b. Extinguishment of Wolf Trap Light located inside Chesapeake Bay N c. All military exercises on the high seas involving four or more vessels Y d. Off-air times of radio beacons when scheduled for routine maintenance 1067: The two most effective generating forces of surface ocean currents are __________.
N a. temperature and salinity differences in the water Y b. wind and density differences in the water N c. water depth and underwater topography N d. rotation of the Earth and continental interference 1075: The expression "first magnitude" is usually used to refer only to bodies of magnitude __________.
Y a. 1.5 and greater N b. 1.25 and greater N c. 1.0 and greater N d. 0.5 and greater 1138: On approaching the English Channel on course 080°T, you note the symbol YBY near a charted buoy. You must pass __________.
N a. northward of the buoy N b. southward of the buoy N c. eastward of the buoy Y d. westward of the buoy 1181: An occulting light is one in which __________.
N a. the period of darkness exceeds the period of light N b. there is only a partial eclipse of the light N c. the periods of light and darkness are equal Y d. the period of light exceeds the period of darkness 1182: Referring to the illustration, which wind speed is reported in position C? (D049NG )
N a. 3 knots N b. 10 knots N c. 20 knots Y d. 30 knots 1252: Port side daymarks may be __________.
Y a. numbered N b. octagonal N c. black and white N d. of any shape 1348: Vessel required to have an Automatic Radar Plotting Aid must have a device to indicate the __________.
Y a. speed of the vessel over the ground or through the water N b. distance to the next port N c. time of the next navigational satellite pass N d. None of the above 1364: The Sailing Directions are published in the Enroute format and the __________.
N a. Coastal editions N b. World Port Index N c. Pilot format Y d. Planning Guide 1375: The Moon rises earlier on succeeding days when the __________.
N a. retardation effect of the revolution of the Moon is greater than the effect due to change of declination Y b. effect due to change of declination is larger than that due to revolution N c. the revolution effect and the declination effect act in the same direction N d. the Moon is on the equator and the revolution effect is at a maximum 1431: A lighthouse is 120 feet (36.6 meters) high and the light has a nominal range of 18 miles. Your height of eye is 42 feet (12.8). If the visibility is 11 miles, approximately how far off the light will you be when the light becomes visible?
N a. 12.5 miles N b. 16.0 miles Y c. 19.0 miles N d. 23.5 miles 1471: A mountain peak charted at 700 feet breaks the horizon, and your height of eye is 12 feet. What is your approximate distance off (choose closest answer)?
Y a. 34.7 nm N b. 40.3 nm N c. 55.3 nm N d. 61.6 nm 1520: The diurnal inequality of the tides is caused by __________.
Y a. the declination of the Moon N b. changing weather conditions N c. the Moon being at apogee N d. the Moon being at perigee 1609: A rapid rise or fall of the barometer indicates __________.
N a. heavy rain within six hours N b. a decrease in wind velocity Y c. a change in the present weather conditions N d. that fog will soon set in 1632: Lighted white and orange buoys must show which color light?
N a. Orange N b. Red Y c. White N d. Alternating yellow and white 1729: The first cloud formations you can use to indicate the bearing of the center of a hurricane or tropical storm are __________.
Y a. the point of convergence of the cirrus clouds N b. the direction of movement of thunderstorms on radar N c. the darkest point of the clouds in the "bar" of the storm N d. the point of origin of the altostratus clouds 1733: An instrument which maintains a continuous record of temperature changes is called a __________.
N a. thermometer N b. barometer Y c. thermograph N d. hygrograph 1738: In the Northern Hemisphere, the right half of the storm is known as the dangerous semicircle because __________.
N a. The wind speed is greater here since the wind is traveling in the same general direction as the storm's track N b. the direction of the wind and seas might carry a vessel into the path of the storm N c. the seas are higher because of greater wind speed Y d. All of the above 1781: While in port, you can follow the approach of a dangerous cyclonic storm by inspecting __________.
N a. the sky overhead N b. the National Weather Service Observing Handbook No.1, Marine Surface Observations N c. the Coast Pilot or Sailing Directions Y d. a weather map 1788: You can follow the approach of a dangerous cyclonic storm by inspecting __________.
N a. the Coast Pilot or Sailing Directions N b. the National Weather Service Observing Handbook No.1, Marine Surface Observations Y c. a weather forecast N d. the sky overhead 1800: In order to insure that a RACON signal is displayed on the radar, you should __________.
N a. increase the brilliance of the PPI scope Y b. turn off the interference controls on the radar N c. use the maximum available range setting N d. increase the radar signal output 1815: Which weather system produces strong cold winds called "Northers" during the winter months in the Gulf of Mexico?
Y a. An anticyclone N b. A polar maritime air mass N c. A cyclone N d. A low pressure system 1884: If a sound signal is emitted from the oscillator of a fathometer, and two seconds elapse before the returning signal is picked up, what depth of water is indicated?
N a. 1648 fathoms N b. 1248 fathoms N c. 1048 fathoms Y d. 824 fathoms 1885: Under the Uniform State Waterway Marking System a mooring buoy is painted __________.
Y a. white with a blue band N b. yellow N c. any color that does not conflict with the lateral system N d. white with a green top 1886: What is the relative bearing of an object dead astern?
N a. 000° N b. 090° Y c. 180° N d. 270° 1934: The great circle of the celestial sphere that passes through the zenith, nadir, and the eastern point of the horizon is the __________.
N a. principal vertical N b. hour circle N c. celestial meridian Y d. prime vertical 1950: The error in a sextant altitude caused by refraction is greatest when the celestial body is __________.
N a. high in the sky Y b. near the horizon N c. rising N d. at or near transit 2021: While on watch, you notice that the air temperature is dropping and is approaching the dew point. Which type of weather should be forecasted?
N a. Hail N b. Heavy rain N c. Sleet Y d. Fog 2093: Information about major breakdowns, repairs, or other emergency operations with regard to weirs and (or) wicket dams, on the western rivers, may be obtained from the __________.
N a. Light List Vol. V N b. List of Lights Y c. Broadcast Notice to Mariners N d. Sailing Directions 2098: Which magnetic compass corrector(s) can be set while the vessel is on a heading of magnetic east or magnetic west?
N a. Quadrantal spheres N b. Heeling magnets Y c. Fore-and-aft magnets N d. Athwartships magnets 2177: This diagram 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. One amber light N b. Three red lights N c. Two red lights Y d. One red light 2202: 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 276°. What action should be taken?
N a. Adjust the compass with the athwartships magnets until the compass reads 264°. Y b. Adjust the compass with the fore-and-aft magnets until the compass reads 273°. N c. Adjust the compass with the quadrantal spheres until the compass reads 270°. N d. Adjust the compass with the athwartships magnets until the compass reads 273°. 2242: A vessel is heading magnetic north and its magnetic compass indicates a heading of 356°. Which action should be taken to remove this error during compass adjustment?
Y a. If the red ends of the magnets are to port you should lower the athwartships tray. N b. If the red ends of the magnets are aft you should raise the fore-and-aft tray. N c. If the blue ends of the magnets are to port, and the athwartships tray is at the top, you should remove some of the magnets. N d. If the blue ends of the magnets are aft you should raise the fore-and-aft tray. 2252: The vertical angle between the horizontal and the magnetic line of force is the __________.
N a. elevation N b. magnetic angle N c. vertical angle Y d. dip 2277: The Light List indicates that a light has a nominal range of 20 miles and is 52 feet high. If the visibility is 12.0 miles and your height of eye is 20 feet, at what approximate distance will you sight the light?
N a. 21.5 miles N b. 20.0 miles Y c. 13.7 miles N d. 12.0 miles 2319: In low latitudes, the new Moon will always rise at about __________.
Y a. sunrise N b. 1200 LMT N c. sunset N d. 2400 LMT 2362: You have completed the magnetic compass adjustments on magnetic east and magnetic south. The vessel is now steady on magnetic north but the compass reads 004°. Which action should be taken?
N a. Use the Flinders bar and adjust the compass until it reads 002°. N b. Use the fore-and-aft magnets and adjust the compass until it reads 000°. Y c. Use the athwartships magnets and adjust the compass until it reads 002°. N d. Use the athwartships magnets and adjust the compass until it reads 000°. 2478: On 23 August 1981 you observe a back sight of the lower limb of the Sun. The sextant altitude (hs) is 116°42.8'. The height of eye is 56 feet and the index error is 2.0' on the arc. What is the observed altitude (Ho)?
Y a. 63°42.0' N b. 63°38.0' N c. 63°19.4' N d. 62°49.6' 2627: Stormy weather is usually associated with regions of __________.
N a. high barometric pressure Y b. low barometric pressure N c. steady barometric pressure N d. changing barometric pressure 2826: You take a bearing of 043° and 169° of two objects. What bearing of a third object will give the best fix?
N a. 356° Y b. 102° N c. 144° N d. 201° 2979: You take a bearing of 356° of a lighthouse. What bearing of another object would give the best fix?
N a. 013° Y b. 082° N c. 176° N d. 201° 3076: An ECDIS is required to display which information?
N a. Radar targets N b. ARPA vectors Y c. Hydrographic data N d. All of the above 3103: In general, on how many radio channels will an automatic identification system (AIS) operate?
N a. 1 Y b. 3 N c. 4 N d. 12