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.
9: When displayed under a single-span fixed bridge, red lights indicate __________.
Y a. the channel boundaries N b. that vessels must stop N c. the bridge is about to open N d. that traffic is approaching from the other side 15: What is the length of a nautical mile?
N a. 1,800 meters N b. 2,000 yards Y c. 6,076 feet N d. 5,280 feet 116: Which wind results from a land mass cooling more quickly at night than an adjacent water area?
N a. Coastal breeze N b. Sea breeze Y c. Land breeze N d. Mistral 129: In working out a local apparent noon sight for your latitude, you subtract the Ho from 90°. The 90° represents the angular distance from __________.
N a. the equator to the elevated pole Y b. your horizon to your zenith N c. your zenith to the elevated pole N d. the geographical position of the Sun to the elevated pole 189: While steering a course of 150°T, you wish to observe the Sun for a speed check. What would the azimuth have to be?
N a. 060°T N b. 090°T Y c. 150°T N d. 240°T 288: When using a radar in a unstabilized mode, fixes are determined most easily from __________.
N a. center bearings N b. tangent bearings Y c. ranges N d. objects that are close aboard 321: Which buoy may be even numbered?
N a. Mid-channel buoy Y b. Unlighted nun buoy N c. Lighted green buoy N d. All of the above 331: What indicates a buoy that should be left to port when entering from seaward? (U.S. Aids to Navigation System)
N a. White light N b. Group flashing characteristic N c. Nun shape Y d. Odd number 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 380: Prevailing winds between 30°N and 60°N latitude are from the __________.
N a. east Y b. west N c. north N d. south 449: You are enroute to assist vessel A. Vessel A is underway at 5 knots on course 063°T, and bears 136°T at 78 miles from you. What is the course to steer at 13 knots to intercept vessel A?
N a. 340° N b. 295° N c. 158° Y d. 114° 508: Which statement about the chartlet is TRUE? (Soundings and heights are in meters) (D010NG )
Y a. There is a dangerous eddy southeast of Beito Island. N b. Maury lightship is visible for 17 miles. N c. The bottom to the south-southeast of the lightship is soft coral. N d. There is a 12-meter deep west of Beito Island and inside the 5-meter line. 552: A Mercator chart is a __________.
Y a. cylindrical projection N b. simple conic projection N c. polyconic projection N d. rectangular projection 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° 573: What is the name of the movable, radial guide line used to measure direction on a radar?
N a. Compass rose Y b. Cursor N c. Plan position indicator N d. Variable range marker 662: What publication contains descriptions of the coast line, buoyage systems, weather conditions, port facilities, and navigation instructions for the United States and its possessions?
Y a. Coast Pilots N b. Sailing Directions N c. Port Index N d. Light List 715: The length of the year with respect to the vernal equinox is the __________.
Y a. tropical year N b. sidereal year N c. anomalistic year N d. All of the above 741: What is the light phase characteristic of a lighted isolated-danger mark?
N a. Interrupted quick flashing N b. Very quick flashing N c. Long flashing Y d. Group flashing 803: Which buoy will NOT display white retroreflective material?
N a. Safe water mark N b. Isolated danger mark Y c. Preferred channel mark N d. Daymark of no lateral significance 829: 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. N b. The set should be applied to the second bearing. N c. The current should be ignored. Y d. The course and speed made good should be determined and used to advance the LOP. 842: Coast Pilots and navigational charts are kept corrected and up-to-date by using the __________.
N a. pilot charts Y b. Notices to Mariners N c. Tide Tables N d. Current Tables 848: It is unlawful to approach within how many yards of a northern right whale?
N a. 200 N b. 300 N c. 400 Y d. 500 864: Uniform, grayish-white cloud sheets that cover large portions of the sky, and are responsible for a large percentage of the precipitation in the temperate latitudes, are called __________.
Y a. altostratus N b. altocumulus N c. cirrostratus N d. cirrocumulus 924: The form of cloud often known as "mackerel sky" which is generally associated with fair weather is __________.
N a. nimbostratus N b. stratus Y c. cirrocumulus N d. cumulonimbus 924: The form of cloud often known as "mackerel sky" which is generally associated with fair weather is __________.
N a. nimbostratus N b. stratus Y c. cirrocumulus N d. cumulonimbus 947: The cold ocean current which meets the warm Gulf Stream between latitudes 40° and 43°N to form the "cold wall" is called the __________.
N a. North Cape Current Y b. Labrador Current N c. Greenland Current N d. North Atlantic Current 996: Warm air masses will generally have __________.
N a. turbulence within the mass Y b. stratiform clouds N c. heavy precipitation N d. good visibility 1024: The dew point is reached when the __________.
N a. temperature of the air equals the temperature of the seawater N b. atmospheric pressure is 14.7 lbs. per square inch N c. relative humidity reaches 50% Y d. air becomes saturated with water vapor 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 1096: With the passage of an occluded front the temperature __________.
N a. rises rapidly N b. remains about the same N c. drops rapidly Y d. depends on whether warm type or cold type occlusion 1201: What is NOT true concerning color sectors of lights?
Y a. Color sectors are expressed in degrees from the light toward the vessel. N b. Color sectors may indicate dangerous waters. N c. Color sectors may indicate the best water across a shoal. N d. Color sectors may indicate a turning point in a channel. 1266: A line of clouds, sharp changes in wind direction, and squalls are most frequently associated with a(n) __________.
N a. occluded front N b. warm front Y c. cold front N d. warm sector 1287: What will be the velocity of the tidal current 4.5 miles east of Smith Point, VA, at 0630 DST (ZD +4) on 6 May 1983?
Y a. 0.3 knot N b. 0.5 knot N c. 0.7 knot N d. 1.0 knot 1301: The four standard light colors used for lighted aids to navigation are red, green, white, and __________.
N a. purple N b. orange N c. blue Y d. yellow 1452: When is the rhumb line distance the same as the great circle distance?
N a. Course 090°T in high latitudes Y b. Course 180°T when you cross the equator N c. Course 045°T in low latitudes N d. The rhumb line distance is always longer than the great circle distance. 1480: What is the definition of height of tide?
N a. The vertical difference between the heights of low and high water N b. The vertical difference between a datum plane and the ocean bottom N c. The vertical distance from the surface of the water to the ocean floor Y d. The vertical distance from the tidal datum to the level of the water at any time 1499: You are scanning the radar screen for a buoy fitted with racon. How should this signal appear on the PPI display?
Y a. Starting with a dash and extending radially outward from the target N b. As a broken line from center of PPI to the target N c. Starting with a dot and extending radially inward from the target N d. Starting with a dash and extending to the right of the target 1513: Scales on aneroid barometers are usually graduated in inches of mercury in the general range of __________.
N a. 26 to 29 inches Y b. 28 to 31 inches N c. 30 to 33 inches N d. 32 to 35 inches 1516: Which correction(s) must be applied to an aneroid barometer?
Y a. Instrument error and height error N b. Instrument error only N c. Height error only N d. Instrument error and latitude correction 1615: The Illustration shows the symbols used on radio facsimile weather charts. Which symbol indicates snow? (D042NG )
N a. G N b. H Y c. M N d. N 1617: The inner cloud bands of a hurricane, when viewed from a distance, form a mass of dense, black cumulonimbus clouds called the __________.
Y a. bar of the storm N b. eye of the storm N c. funnel N d. front 1651: From which type of cloud can a tornado or waterspout develop?
N a. Nimbostratus N b. Altostratus Y c. Cumulonimbus N d. Cirrus 1665: Air circulation is caused or affected by __________.
N a. the rotation of the earth on its axis N b. convection currents caused by differences in radiant heating between equatorial and polar regions N c. mountain ranges Y d. All of the above 1692: The force resulting from the earth's rotation that causes winds to deflect to the right in the Northern Hemisphere and to the left in the Southern Hemisphere is called __________.
N a. pressure gradient Y b. Coriolis effect N c. aurora borealis N d. ballistic deflection 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 1873: Lighted information markers show __________.
N a. green lights N b. red lights N c. yellow lights Y d. white lights 1928: "Rotation" is the __________.
N a. wobbling of the Earth about its axis N b. motion of bodies in the solar system relative to the stars N c. motion of a celestial body in its orbit Y d. spinning of a celestial body about its axis 2262: The Milky Way is an example of a __________.
N a. cluster Y b. galaxy N c. nova N d. nebula 2388: The reference point for determination of GMT is the passage of the mean sun over what line?
N a. First point of Aries N b. Observer's meridian N c. 0° longitude Y d. 180° longitude 2585: The letter D as shown represents the __________. (D006NG )
N a. visible horizon Y b. geometrical horizon N c. sensible horizon N d. celestial horizon 2588: You are approaching an open drawbridge and sound the proper signal. You receive no acknowledgment from the bridge. Which action should you take?
Y a. Approach with caution and proceed through the open draw. N b. Approach under full control to a position no closer than 400 yards from the bridge and await a signal from the bridge. N c. Hold in the channel as a vessel is closing the bridge from the other direction. N d. Resound the opening signal and do not pass through the bridge until signals have been exchanged. 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 2710: In the horizon system of coordinates what is equivalent to the local hour angle of the celestial equator system?
N a. Altitude Y b. Azimuth N c. Zenith distance N d. Colongitude 2724: Which condition indicates that your radar needs maintenance?
Y a. Serrated range rings N b. Indirect echoes N c. Multiple echoes N d. Blind sector 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° 2858: While navigating in fog off a coastline of steep cliffs, you hear the echo of the ships fog horn 2 1/2 seconds after the signal was sounded. What is the distance to the shore?
N a. 225 yards Y b. 460 yards N c. 750 yards N d. 910 yards 2877: Class I and II private aids to navigation in or along navigable waters of the United States are listed in the __________.
N a. Sailing Directions Y b. Light List N c. List of Private Aids N d. Aids to Navigation Manual 2882: While upbound through Memphis, the weather report on TV news indicates that a warm front is stationary over the Kentucky - Missouri - Tennessee areas. What weather conditions should you expect?
N a. Strong, gusting winds from the NW with thundershowers N b. Light winds from the northeast with clear skies N c. A "blue norther" Y d. Southerly winds with steady rain; fog or overcast 3030: Isogonic lines are lines on a chart indicating __________.
Y a. points of equal variation N b. points of zero variation N c. the magnetic latitude N d. magnetic dip 3091: Which of the following must an ECDIS system be able to perform?
N a. Conversion of "graphical coordinates" to "display coordinates" N b. Transformation of local datum to WGS-'84 datum N c. Calculation of true azimuth and distance between two geographical points Y d. All of the above