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.
21: Which buoy is NOT numbered?
N a. Green can buoy Y b. Preferred-channel buoy N c. Red lighted buoy N d. Green gong buoy 35: You are on a vessel at 0400 ZT on 3 July, and the ZD for your position is -8. What is the GMT?
N a. 1200, 3 July N b. 2000, 3 July N c. 1200, 2 July Y d. 2000, 2 July 47: The range of tide is the __________.
N a. distance the tide moves out from the shore N b. duration of time between high and low tide Y c. difference between the heights of high and low tide N d. maximum depth of the water at high tide 127: Mean low water is the average height of __________.
N a. the surface of the sea N b. high waters and low waters Y c. all low waters N d. the lower of the two daily low tides 138: The path that a vessel is expected to follow, represented on a chart by a line drawn from the point of departure to the point of arrival, is the __________.
N a. DR plot Y b. track line N c. heading N d. estimated course 169: You want to transit Hell Gate on 23 July 1983. What is the period of time around the AM (ZD +4) slack before ebb when the current will be less than 0.5 knot?
Y a. 0939 to 0957 N b. 0943 to 0953 N c. 0844 to 0852 N d. 0348 to 0356 190: You are enroute to Jacksonville, FL, from San Juan, P.R. There is a fresh N'ly wind blowing. As you cross the axis of the Gulf Stream you would expect to encounter __________.
Y a. steeper waves, closer together N b. long swells N c. cirrus clouds N d. smoother seas and warmer water 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 382: Which would you consult for information about the general current circulation in the North Atlantic Ocean?
Y a. Pilot chart N b. Coast Pilot N c. Current Table N d. Climatological Atlas 400: Information about the currents for the Pacific Coast of the U. S. are found in the __________.
N a. Ocean Current Tables N b. Nautical Almanac N c. Tide Tables Y d. Tidal Current Tables 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 530: Under the U.S. Aids to Navigation System, a lighted buoy with a spherical topmark marks __________.
N a. the port side of the channel N b. the position of underwater cables Y c. safe water N d. a hazard to navigation 556: In a tropical cyclone in the Northern Hemisphere, a vessel hove to with the wind shifting counterclockwise would be __________.
Y a. in the navigable semicircle N b. in the dangerous semicircle N c. directly in the path of the center N d. ahead of the storm 596: Which condition would NOT indicate the approach of a tropical storm?
N a. Long, high swells N b. Cirrus clouds N c. Halos about the Sun or Moon Y d. Decrease in wind velocity 602: Between the equator and the 46th parallel of latitude, there are 3099 meridional parts. How many degrees of equatorial longitude does 3099 meridional parts represent?
N a. 35°52'45" Y b. 51°39'00" N c. 74°21'11" N d. 82°36'12" 610: The apparent wind's speed can be zero, but only when two conditions are present. One condition is that the true wind __________.
N a. must be from dead ahead N b. speed must be zero Y c. must be from dead astern N d. must be on the beam 705: The precession of the equinoxes occurs in a(n) __________.
N a. easterly direction Y b. westerly direction N c. northerly direction N d. southerly direction 712: Information about the pilotage available at Miami harbor may best be obtained from which publication?
N a. World Port Index N b. Sailing Directions N c. Pilot Chart Y d. United States Coast Pilot 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° 815: When entering from seaward, a buoy displaying a composite group (2+1) flashing red light indicates __________.
Y a. a junction with the preferred channel to the left N b. a sharp turn in the preferred channel to the right N c. the starboard side of the secondary channel N d. a wreck to be left on the vessel's port side 821: In addition to monitoring channel 16, all Corps of Engineer locks may use as working channels __________.
N a. 06, 12 and 22A N b. 01A, 05A and 07A Y c. 12, 13 and 14 N d. 14, 24 and 28 827: The Benguela Current flows in a __________.
N a. SW'ly direction along the NW coast of Africa N b. S'ly direction off the East Coast of Australia Y c. NW'ly direction along the SW coast of Africa N d. SW'ly direction along the SE coast of Greenland 863: The compass heading of a vessel differs from the true heading by __________.
Y a. compass error N b. variation N c. magnetic dip N d. deviation 874: Altocumulus clouds are defined as __________.
N a. high clouds Y b. middle clouds N c. low clouds N d. vertical development clouds 920: What is the average speed of the movement of a hurricane following the recurvature of its track?
N a. 5 to 10 knots Y b. 20 to 30 knots N c. 40 to 50 knots N d. Over 60 knots 973: The heading of a vessel is indicated by what part of the compass?
N a. Card N b. Needle Y c. Lubber's line N d. Gimbals 1011: You are underway in the North Sea on course 127°T. You sight a buoy with the topmarks shown bearing two points on the starboard bow. Which action must be taken? (D025NG )
N a. Alter course to starboard until the buoy is at least two points on the port bow, then hold course. N b. Alter course to port until the buoy is broad on the starboard quarter, then hold course. N c. Change course to have the buoy close aboard either side. Y d. Ensure the bearings change to the right. 1015: Which statement about the time diagram shown is correct? (D005NG )
N a. The Greenwich hour angle of the Sun is greater than 180°. N b. The meridian angle of the Sun is labeled west. N c. The date of Greenwich is the day after the date for observer at M. Y d. The Sun has already passed the lower branch of the observer's meridian. 1123: What are the only magnetic compass correctors that correct for both permanent and induced effects of magnetism?
N a. Quadrantal spheres Y b. Heeling magnets N c. Athwartships magnets N d. Fore-and-aft magnets 1125: The Light List shows that a navigational light has a nominal range of 19 miles and a height above water of 52 feet (15.8 meters). Your height of eye is 42 feet (12.8 meters) and the visibility is 10.0 miles. At what approximate range will you first sight the light?
N a. 10.0 miles Y b. 16.0 miles N c. 17.3 miles N d. 19.0 miles 1195: A position that is obtained by applying estimated current and wind to your vessel's course and speed is a(n) __________.
N a. dead reckoning position N b. fix Y c. estimated position N d. None of the above 1208: Which type of cloud is indicated by the number 1? (D039NG )
Y a. Cirrus N b. Altostratus N c. Altocumulus N d. Nimbostratus 1300: You are approaching a sea buoy which emits a racon signal. This signal is triggered by which type of radar?
Y a. 3 cm N b. 10 cm N c. Both 3 cm and 10 cm N d. Signal does not depend on radar type. 1356: The first indications a mariner will have of the approach of a warm front will be __________.
N a. large cumulonimbus (thunderclouds) building up Y b. high cirrus clouds gradually changing to cirrostratus and then to altostratus N c. fog caused by the warm air passing over the cooler water N d. low dark clouds accompanied by intermittent rain 1434: What is NOT a characteristic of cardinal marks?
N a. Yellow and black bands N b. White lights Y c. Square or triangular topmarks N d. Directional orientation to a hazard 1438: In the Northern Hemisphere you are caught in the dangerous semicircle of a storm with plenty of sea room available. The best course of action is to bring the wind on the __________.
N a. port quarter and make as much headway as possible N b. starboard quarter and make as much headway as possible Y c. starboard bow and make as much headway as possible N d. port bow and make as much headway as possible 1442: A great circle track provides the maximum saving in distance on __________.
Y a. easterly courses in high latitudes N b. southerly courses in high latitudes N c. westerly courses in low latitudes N d. easterly courses in low latitudes that cross the equator 1498: A true bearing of a charted object, when plotted on a chart, will establish a __________.
N a. fix Y b. line of position N c. relative bearing N d. range 1546: You are sailing south on the Intracoastal Waterway (ICW) when you sight a red nun buoy with a yellow triangle painted on it. Which statement is TRUE?
N a. Geometric symbols such as squares and triangles replace letters and numbers on ICW aids to navigation. Y b. The ICW and another waterway coincide in this geographical area. N c. The yellow triangle identifies a sharp turn (over 60°) in the channel. N d. This is an information or regulatory buoy that also has lateral significance. 1548: The Illustration shows the symbols used on radio facsimile weather charts. The symbol indicated at letter "K" represents a __________. (D042NG )
Y a. hurricane N b. thunderstorm N c. convergence zone N d. convergence line 1571: Which sextant in illustration D043NG reads 29°42.7'? (D043NG )
Y a. A N b. B N c. C N d. D 1661: Advection fog may be formed by warm moist air passing over a __________.
N a. warmer sea surface Y b. cooler sea surface N c. dry coastal plain N d. polar land mass 1771: Which type of precipitation is a product of the violent convection found in thunderstorms?
N a. Snow N b. Freezing Rain Y c. Hail N d. Sleet 1776: A vessel operating on the Great Lakes, and whose position is southeast of an eastward-moving storm center, would NOT experience __________.
N a. a falling barometer N b. lowering clouds and drizzle Y c. a northeast wind N d. rain or snow 1988: The parallel of latitude at 23°27'N is the __________.
Y a. Tropic of Cancer N b. Tropic of Capricorn N c. Arctic Circle N d. ecliptic 2016: Which statement about the Flinders bar of the magnetic compass is CORRECT?
Y a. It compensates for the error caused by the vertical component of the Earth's magnetic field. N b. It compensates for error caused by the heeling of a vessel. N c. It compensates for quadrantal deviation. N d. It is only needed in equatorial waters. 2161: Yesterday your chronometer read 03h 01m 56s at the 1500 GMT time tick. Today your chronometer read 03h 01m 58s at the 1500 GMT time tick. What is the chronometer error?
N a. 03h 01m 58s fast Y b. 01m 58s fast N c. +2s N d. -2s 2171: 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. One amber light N b. One red light N c. Two red lights Y d. Three red lights 2229: A vessel is heading magnetic north and its magnetic compass indicates a heading of 003°. What action should be taken to remove this error during compass adjustment?
Y a. If the red ends are to port the athwartships magnets should be raised. N b. If the blue ends are to port the athwartships magnets should be raised. N c. If the red ends are forward the fore-and-aft magnets should be lowered. N d. If the blue ends are forward the fore-and-aft magnets should be raised. 2270: The lubber's line of a magnetic compass __________.
N a. always shows true north direction Y b. indicates the vessel's heading N c. is always parallel to the vessel's transom N d. is located on the compass card 2389: The autumnal equinox is the point where the Sun is at __________.
N a. maximum declination north N b. maximum declination south N c. 0° declination going to northerly declinations Y d. 0° declination going to southerly declinations 2542: Which magnetic compass corrector(s) CANNOT be set while the vessel is on a heading of magnetic north or magnetic south?
N a. Athwartships magnets N b. Heeling magnet Y c. Flinders bar N d. All of the above can be set on magnetic north or magnetic south headings. 2814: In low latitudes the range of the diurnal variation of pressure is up to __________.
N a. 0.5 millibar Y b. 3.0 millibars N c. 6.0 millibars N d. 10.0 millibars 2846: Which type of daymark is used to mark the port side of the channel when entering from sea?
N a. Red and white octagon N b. Black and white diamond N c. Red triangle Y d. Green square 2851: 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. dead-reckoning position Y b. estimated position N c. running fix N d. fix 2954: You are inbound in a channel marked by a range. The range line is 309°T. You are steering 306°T. The range appears as shown and is closing. Which action should you take? (D047NG )
N a. Continue on the present heading until the range is in line then alter course to the left. N b. Immediately alter course to the right to bring the range in line. Y c. Continue on course until the range is closed, then alter course to the right. N d. Immediately alter course to 309°T. 3019: Where would you find information about the time of high tide at a specific location on a particular day of the year?
Y a. Tide Tables N b. Tidal Current Tables N c. Coast Pilot N d. Nautical Almanac 3052: The Sailing Directions contain information on __________.
N a. required navigation lights N b. lifesaving equipment standards N c. casualty reporting procedures Y d. currents in various locations 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 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