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.
38: When navigating a vessel, you __________.
N a. can always rely on a buoy to be on station N b. can always rely on a buoy to show proper light characteristics N c. should assume a wreck buoy is directly over the wreck Y d. should never rely on a floating aid to maintain its exact position 139: What is the geographic longitude of a body whose GHA is 215°15'?
N a. 35°15'W N b. 35°15'E Y c. 144°45'E N d. 144°45'W 162: A chart with a scale of 1:80,000 would fall into the category of a __________.
N a. sailing chart N b. general chart Y c. coastal chart N d. harbor chart 210: The position labeled C is a(n) __________. (D051NG )
N a. fix Y b. running fix N c. estimated position N d. dead reckoning position 229: The shoreline on charts generally represents the mean __________.
Y a. high water line N b. low water line N c. low water spring line N d. tide level 243: The loran lines drawn on navigation charts represent __________.
Y a. ground waves N b. skywaves N c. either ground waves or skywaves interchangeably N d. an average between ground wave and skywave positions 250: Weather systems in the middle latitudes generally travel from __________.
Y a. west to east N b. east to west N c. north to south N d. None of the above 299: Steady precipitation is typical of __________.
N a. coming cold weather conditions Y b. a warm front weather condition N c. high pressure conditions N d. scattered cumulus clouds 305: IN REGION A of the IALA Buoyage System, when entering from seaward, the port side of a channel would be marked by a __________.
Y a. red can buoy N b. black can buoy N c. red conical buoy N d. black conical buoy 313: The Loran-C receiver __________.
N a. is not affected by interference N b. can be used at any distance with accuracy Y c. can be affected by interference N d. is reliable only from sunrise to sunset 318: Vessels required to have an Automatic Radar Plotting Aid must have a device to indicate the __________.
N a. distance to the next port Y b. speed of the vessel over the ground or through the water N c. time of the next navigational satellite pass N d. None of the above 335: What is the geographic longitude of a body whose GHA is 232°27'?
Y a. 127°33'E N b. 52°27'E N c. 61°52'W N d. 61°52'E 360: The Illustration shows the symbols used on radio facsimile weather charts. The symbol indicated at letter "M" represents __________. (D042NG )
N a. rain Y b. snow N c. hail N d. ice 376: According to Buys Ballot's law, when an observer in the Northern Hemisphere experiences a northeast wind the center of low pressure is located to the __________.
N a. northeast N b. west-southwest N c. northwest Y d. south-southeast 391: When outbound from a U.S. port, a buoy displaying a flashing red light indicates __________.
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 port side of the channel N d. a wreck to be left on the vessel's starboard side 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 552: A Mercator chart is a __________.
Y a. cylindrical projection N b. simple conic projection N c. polyconic projection N d. rectangular projection 557: Your vessel has a draft of 23 feet. On 23 June 1983 you wish to pass over a temporary obstruction near Beaufort, SC, that has a charted depth of 22 feet. Allowing for a safety margin of 3 feet, what is the earliest time after 1600 DST (ZD +4) that this passage can be made?
Y a. 1750 N b. 1815 N c. 1855 N d. 1944 565: The letter B as shown represents the __________. (D006NG )
Y a. geoidal horizon N b. celestial horizon N c. visible horizon N d. sensible horizon 585: What great circle is always needed to form the astronomical triangle?
N a. Celestial Equator N b. Prime Meridian Y c. Celestial Meridian N d. Prime Vertical Circle 799: In Region A of the IALA Buoyage System, when entering from seaward, the starboard side of a channel would be marked by a __________.
N a. green can buoy N b. red can buoy Y c. green conical buoy N d. red conical buoy 811: Under the IALA-A Buoyage System, a green spar buoy with a triangular topmark would indicate that the buoy __________.
Y a. should be left to port when heading out to sea N b. may be left close aboard on either side N c. is on the north side of a point of interest N d. is marking the preferred channel 817: Which current would you encounter on a direct passage from London, England, to Cape Town, South Africa?
N a. Falkland Current N b. Brazil Current N c. Norway Current Y d. Benguela Current 894: On a clear, warm day, you notice the approach of a tall cumulus cloud. The cloud top has hard well defined edges and rain is falling from the dark lower edge. Should this cloud pass directly overhead __________.
Y a. it will be preceded by a sudden increase in wind speed N b. it will be preceded by a sudden decrease in wind speed N c. the wind speed will not change as it passes N d. the wind will back rapidly to left in a counterclockwise direction as it passes 911: Under the IALA-B Buoyage System, a buoy displaying a red light will __________.
Y a. be left to starboard when entering from seaward N b. show a light characteristic of Morse Code "A" N c. be lettered N d. have a radar reflector 940: What is the length of a nautical mile?
Y a. 6,076 feet N b. 5,280 feet N c. 2,000 yards N d. 1,850 meters 1039: While taking weather observations, you determine that the wind is coming from the west. In the weather log, you would record the wind direction as __________.
N a. 000° N b. 090° N c. 180° Y d. 270° 1150: You are on course 312°T. To check the speed of your vessel you should observe a celestial body on which bearing?
Y a. 312° N b. 000° N c. 090° N d. 222° 1151: Buoys are marked with reflective material to assist in their detection by searchlight. Which statement is TRUE?
N a. A safe-water buoy will display red and white vertical stripes of reflective material. N b. All reflective material is white because it is the most visible at night. N c. A special-purpose mark will display either red or green reflective material to agree with its shape. Y d. A preferred-channel buoy displays either red or green reflective material to agree with the top band of color. 1167: The velocity of the current in large coastal harbors is __________.
N a. unpredictable Y b. predicted in Tidal Current Tables N c. generally constant N d. generally too weak to be of concern 1243: Magnetic heading differs from compass heading by __________.
N a. compass error N b. true heading N c. variation Y d. deviation 1318: You are to sail from Elizabethport, N.J., on 17 November 1983 with a maximum draft of 27 feet. You will pass over an obstruction in the channel near Sandy Hook that has a charted depth of 25.5 feet. The steaming time from Elizabethport to the obstruction is 1h 50m. What is the earliest time (ZD +5) you can sail on 17 November and pass over the obstruction with 2 feet of clearance?
N a. 0059 Y b. 0121 N c. 0159 N d. 0221 1334: The Illustration shows the symbols used on radio facsimile weather charts. The symbol indicated at letter "H" represents __________. (D042NG )
N a. ice N b. snow N c. rain Y d. hail 1406: What will act to dissipate fog?
N a. Upwelling cold water N b. Advection of warm air over a colder surface N c. Rain that is warmer than air Y d. Downslope motion of an air mass along a coast 1417: Determine the first time after 1200 EST (ZD +5) when the velocity of the current will be 0.5 knot on 18 November 1983, at Marcus Hook, PA.
N a. 1221 N b. 1226 Y c. 1239 N d. 1312 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 1510: During daylight savings time the meridian used for determining the time is located farther __________.
N a. west Y b. east N c. east in west longitude and west in east longitude N d. west in west longitude and east in east longitude 1584: A decrease in barometric pressure is associated with all of the following except __________.
N a. rising warm air N b. proximity to a low pressure area N c. inward spiraling circulation Y d. clear dry weather 1644: Which scale is used to estimate wind speed by observing sea conditions __________.
N a. Metric scale N b. Wind scale N c. Coriolis scale Y d. Beaufort scale 1741: The left half of the storm is called the navigable semicircle because __________.
N a. the wind speed is decreased by the storm's forward motion N b. the wind tends to blow vessels away from the storms track Y c. Both A and B N d. Neither A nor B 1753: On a weather map, a large letter "H" means __________.
Y a. a high pressure area with cool, dry air, and fair weather N b. a high pressure area with warm, moist air, and inclement weather N c. horse latitudes, with rough seas and strong winds N d. a heavy squall line near the "H" 1756: Where would you expect to find climatological and meteorological tables for the Gulf Coast area?
N a. In the publication entitled Radio Aids to Navigation Y b. In the back of Coast Pilot #5 N c. In any Coast Pilot volume N d. Only at the National Weather Service office 1838: The Light List shows a lighted aid to navigation on the left bank. This means that the light can be seen on the starboard side of a vessel __________.
Y a. ascending the river N b. descending the river N c. crossing the river N d. proceeding towards sea 1871: A lighted buoy to be left to starboard, when entering a U.S. port from seaward, shall have a __________.
N a. green light N b. white light Y c. red light N d. light characteristic of Morse (A) 1898: The subregions of the United States Gulf and East Coasts are numbered 11, 12 and 13 within the chart numbering system. Which chart number indicates a chart for either the Gulf or East coast?
N a. 14312 N b. 25134 N c. 21105 Y d. 11032 1924: The point on the celestial sphere that is directly below an observer is the __________.
N a. pole Y b. nadir N c. node N d. zenith 2000: A vessel heading SE is on a course of __________.
N a. 112.5° Y b. 135.0° N c. 157.5° N d. 180.0° 2261: You determine your vessel's position by taking a range and bearing to a buoy. Your position will be plotted as a(n) __________.
N a. running fix N b. fix N c. dead-reckoning position Y d. estimated position 2308: The points where the Sun is at 0° declination are known as __________.
N a. solstices Y b. equinoxes N c. perigee N d. apogee 2320: The type of current which will have the greatest effect on the course made good for your vessel is __________.
N a. one flowing in the same direction as your course steered N b. one flowing in the opposite direction as your course steered Y c. one that flows at nearly right angles to your course steered N d. a rotary current in which the direction of current flow constantly changes 2418: While proceeding downriver, you sight a red triangular-shaped daymark on the left bank. Under the U.S. Aids to Navigation System on the Western Rivers this is a __________.
N a. special purpose signal Y b. passing daymark N c. mark with no lateral significance N d. crossing daymark 2666: The following boats are approaching a lock. Which has priority for locking?
N a. An 85-foot yacht Y b. Corps of Engineer towboat running empty-headed N c. "Delta Queen" (passenger vessel) N d. An integrated chemical tow 2690: Right ascension is primarily used by the navigator for __________.
N a. calculating amplitudes N b. calculating great circle sailings by the Ageton method N c. entering the Air Navigation Tables (Selected Stars) Pub 249 Y d. plotting on star finders 2762: You take a bearing of 176° of a lighthouse. Which bearing of another object would give the best fix?
Y a. 079° N b. 151° N c. 176° N d. 292° 2819: The time interval between successive wave crests is called __________.
Y a. wave period N b. wavelength N c. frequency N d. significant wave height 2961: Which position includes the effects of wind and current?
N a. Dead reckoning positions Y b. Estimated positions N c. Leeway position N d. Set position 2964: The pictures shown represent the geographic location of a vessel and the radar presentation at the same time. Which statement is TRUE? (D011NG )
N a. Ship No. 1 does not paint as an individual target due to the side lobe affect. N b. The small island is not detected due to the limitation caused by the pulse length. N c. A tangent bearing of the headland to the south-southeast is corrected by subtracting one-half of the beam width. Y d. Ship No. 2 is not detected due to the combined affects of beam width and pulse length. 3041: The letter H in illustration D006NG represents the __________.
N a. refractive horizon N b. geoidal horizon N c. celestial horizon Y d. visible horizon 3068: Which of the following data layer categories is NOT displayed on ECDIS?
N a. Notice to Mariners information N b. ECDIS warnings and messages Y c. Ship hydrodynamic information N d. Hydrographic Office data 3085: An ECDIS is required to display which information?
N a. Water temperature N b. Climatology data N c. Speed of advance Y d. Depth contours