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.
106: A local wind which occurs during the daytime and is caused by the different rates of warming of land and water is a __________.
N a. foehn N b. chinook N c. land breeze Y d. sea breeze 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 164: The part of a sextant mounted directly over the pivot of the index arm is the __________.
Y a. index mirror N b. horizon glass N c. micrometer drum N d. telescope 185: A ship is in longitude 54°00'W on a true course of 270°. The ship's clocks are on the proper time zone. At what longitude should the clocks be changed to maintain the proper zone time?
N a. 45°00'W N b. 52°30'W N c. 60°00'W Y d. 67°30'W 200: When navigating using GPS, what is an indicator of the geometry of the satellites that your receiver is locked onto?
Y a. Horizontal Dilution of Precision N b. Selective Availability N c. Doppler Shifting N d. Precision Coding 205: The difference between local apparent time (LAT) and local mean time (LMT) is indicated by the __________.
Y a. equation of time N b. difference of longitude between the local and central meridian in time units N c. longitude in time units N d. zone description 234: When the declination of the Moon is 0°12.5'S, you can expect some tidal currents in Gulf Coast ports to __________.
N a. exceed the predicted velocities N b. become reversing currents N c. have either a double ebb or a double flood Y d. become weak and variable 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 370: Prevailing winds between 30°N and 60°N latitude are from the __________.
N a. north N b. south N c. east Y d. west 425: 90° - Ho = __________.
N a. sextant altitude N b. co-latitude N c. LHA Y d. zenith distance 477: Determine the height of the tide at 1430 EST (ZD +5) at New Bedford, MA, on 10 April 1983.
N a. 1.1 feet N b. 1.2 feet Y c. 1.4 feet N d. 1.7 feet 507: 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?
Y a. 1228 N b. 1240 N c. 1244 N d. 1248 513: You are radar scanning for a buoy fitted with a racon. Which radar screen represents the presentation you should expect on the PPI? (D017NG )
N a. A Y b. B N c. C N d. D 534: What is TRUE concerning an anemometer on a moving vessel?
N a. It measures true wind speed. N b. It measures true wind speed and true wind direction. Y c. It measures apparent wind speed. N d. It measures apparent wind speed and true wind direction. 534: What is TRUE concerning an anemometer on a moving vessel?
N a. It measures true wind speed. N b. It measures true wind speed and true wind direction. Y c. It measures apparent wind speed. N d. It measures apparent wind speed and true wind direction. 536: You are enroute from Puerto Rico to New York. A hurricane makes up and is approaching. If the wind veers steadily, this indicates that your vessel is __________.
Y a. in the dangerous semicircle N b. in the navigable semicircle N c. directly in the path of the storm N d. in the storm center 637: Your draft is 24 feet. You wish to pass over an obstruction near Lovell Island, MA, on 6 May 1983. The charted depth is 22 feet. Allowing a safety margin of 3.0 feet, what is the earliest time after 0200 DST (ZD +4) that this passage can be made?
N a. 0215 N b. 0245 N c. 0310 Y d. 0347 719: You are on course 209°T. In order to check the longitude of your vessel, you should observe a celestial body on which bearing?
N a. 209° Y b. 270° N c. 299° N d. 000° 733: What would give the best radar echo?
N a. The beam of a three masted sailing vessel with all sails set. N b. A 110-foot fishing vessel with a radar reflector in its rigging. N c. A 300-foot tanker, bow on. Y d. A 600-foot freighter, beam on. 750: On a working copy of a weather map, a cold front is represented by what color line?
N a. Red Y b. Blue N c. Alternating red and blue N d. Purple 761: Under the IALA Buoyage Systems, a safe water mark may NOT __________.
N a. be spherical N b. display a white light N c. be lettered Y d. show a quick flashing light 779: Which sextant shown has an index error of 0'20" on the arc? (D050NG )
N a. A N b. B Y c. C N d. D 780: Apparent wind speed blowing across your vessel while underway can be measured by a(n) __________.
N a. barometer N b. wind vane Y c. anemometer N d. thermometer 793: The permanent magnetism of a vessel may change in strength due to __________.
N a. a collision with another vessel N b. being moored on a constant heading for a long period of time N c. being struck by lightning Y d. All of the above 795: The path of a celestial body during its daily apparent revolution around the Earth is called its __________.
N a. ecliptic Y b. diurnal circle N c. altitude circle N d. circle of position 822: Charts should be corrected by using information published in the __________.
N a. Light List N b. American Practical Navigator Y c. Notice to Mariners N d. Coast Pilot 865: The radius of a circle of equal altitude of a body is equal to the __________.
Y a. coaltitude of the body N b. altitude of the body N c. codeclination of the body N d. polar distance 934: Clouds that form as small white flakes or scaly globular masses covering either small or large portions of the sky are __________.
N a. cirrus N b. cirrostratus N c. altostratus Y d. cirrocumulus 961: In which country would you expect the channels to be marked with the IALA-B Buoyage System?
Y a. Brazil N b. Tanzania N c. New Zealand N d. Norway 1052: What is the approximate geographic range of Southwest Ledge Light, Connecticut, if your height of eye is 32 feet (9.8 meters)? Refer to "Reprints from the LIGHT LISTS AND COAST PILOTS" .
Y a. 15.5 nm N b. 13.4 nm N c. 8.7 nm N d. 6.9 nm 1111: Black double-cone topmarks are the most important feature, by day, of cardinal marks. Which of the four topmarks shown indicates the best navigable water lies to the west of the buoy? (D030NG )
N a. A N b. B Y c. C N d. D 1128: In 1981, when would Jupiter and Saturn be visible in temperate latitudes for both evening and morning stars?
N a. 10 January Y b. 27 March N c. 22 June N d. 8 October 1235: Weather information provided by the National Weather Service (NWS) advisories should be used along with __________.
N a. the Tide Tables and Tidal Current Tables N b. the local Notice to Mariners Y c. weather maps and local knowledge N d. any U.S. Coast Pilot 1311: What is the characteristic of a quick light?
N a. Shows groups of 2 or more flashes at regular intervals N b. Durations of light and darkness are equal Y c. Shows not less than 60 flashes per minute N d. Shows quick flashes for about 5 seconds followed by a 1 second dark period 1319: The Sailing Directions (Planning Guide) contain information on all of the following EXCEPT __________.
Y a. coastal features N b. ocean basin environment N c. ocean routes N d. military operating areas 1332: The longitude of the upper vertex of a great circle track is 169°E. What is the longitude of the lower vertex?
N a. 076°E N b. 169°W N c. 101°W Y d. 011°W 1351: Luminous range is the __________.
N a. maximum distance at which a light may be seen in clear weather Y b. maximum distance at which a light may be seen under existing visibility conditions N c. maximum distance at which a light may be seen considering the height of the light and the height of the observer N d. average distance of visibility of the light 1384: Which type of cloud is indicated by number 9? (D039NG )
N a. Cumulus Y b. Cumulonimbus N c. Altostratus N d. Stratocumulus 1426: Fog is most commonly associated with a(n) __________.
Y a. warm front at night N b. low pressure area N c. anticyclone N d. cold front in the spring 1466: Advection fog is most commonly caused by __________.
N a. air being warmed above the dew point N b. saturation of cold air by rain N c. a rapid cooling of the air near the surface of the Earth at night Y d. warm moist air being blown over a colder surface 1515: An aneroid barometer on a boat should always be __________.
N a. located in an air-conditioned area N b. mounted in the passenger compartment N c. protected by a collision bulkhead Y d. permanently mounted 1641: The low, dark, sheet-like cloud which is associated with continuous precipitation for many hours is a __________.
N a. cirrus cloud N b. cumulus cloud N c. cumulonimbus cloud Y d. nimbostratus cloud 1730: If you observe the point of cloud convergence shifting to the right and the "bar" of the storm appears to move along the horizon __________.
Y a. the center of the storm will by-pass you N b. the storm will strike you on the starboard side N c. you are in the direct path of the storm and should take immediate steps to batten down loose gear N d. the storm is starting to break up 1746: Swells that have outrun the storm are produced in the __________.
N a. left front quadrant Y b. right front quadrant N c. rear N d. directly ahead on the storms projected track 1784: If your vessel were proceeding down river (descending), a green square marker with a green reflector border on the right bank would be a __________.
N a. mile board N b. dredging mark Y c. passing daymark N d. crossing daymark 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 1952: The Moon is subject to four types of libration. Which of the following is NOT one of these types of libration?
N a. Libration in longitude Y b. Geocentric libration N c. Diurnal libration N d. Physical libration 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 2102: 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. 21214 Y b. 11314 N c. 14313 N d. 14114 2111: Vessels regularly navigating Ohio and Mississippi rivers above Cairo, Illinois, and their tributaries, shall at all times have on board a copy of __________.
N a. Tide Tables N b. U.S. Coast Pilot Y c. U.S. Army Corps of Engineers Navigation Regulations (Blue Book) N d. Sailing Directions 2165: 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 B if the lock walls and piers are not awash? (D037NG )
Y a. Three red lights N b. Two red lights N c. One red light N d. One amber light 2187: The 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. No lights N b. Three red lights N c. Two red lights Y d. One red lights 2266: It is difficult to determine which limb of the Moon is fully illuminated __________.
N a. when the Moon is low in the sky at rising or setting N b. at the new Moon phase N c. when taking Moon sights during daylight Y d. when the terminator is nearly vertical 2384: On U.S. charts, you can tell if a named feature such as a rock (i.e. Great Eastern Rock in Block Island Sound) is submerged by the __________.
N a. color of ink used to print the name Y b. style of type used to print the name N c. dashed circle around the feature N d. magenta circle around the feature 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 2652: The dividing meridian between zone descriptions -10 and -11 is __________.
N a. 135°30'E N b. 145°00'E N c. 150°00'E Y d. 157°30'E 2716: Under the U.S. Aids to Navigation System on the Western Rivers, passing daymarks on the left descending bank are __________.
N a. green squares N b. green diamonds N c. red diamonds Y d. red triangles 2887: The letter B in illustration D006NG represents the __________.
N a. visible horizon N b. sensible horizon Y c. geoidal horizon N d. celestial horizon 2890: 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?
N a. Light, southerly winds; high humidity and possibly fog Y b. Moderate winds from the northwest, clear visibility and cooler temperatures N c. Low overcast; mild temperatures with light, steady rain or drizzle N d. Scattered clouds with light, southeasterly winds; high humidity and possibly fog 2952: The channel under a bridge is marked with lights of the lateral system. The centerline of the channel shall be marked on the bridge by __________.
Y a. an occulting white light N b. a yellow light N c. three fixed white lights N d. a flashing blue light