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.
11: A buoy having red and green horizontal bands would have a light characteristic of __________.
N a. interrupted quick flashing Y b. composite group flashing N c. Morse (A) N d. quick flashing 96: A weather forecast states that the wind will commence veering. In the Northern Hemisphere this indicates that the wind will __________.
Y a. shift in a clockwise manner N b. shift in a counterclockwise manner N c. continue blowing from the same direction N d. increase in velocity 133: The line connecting the Loran-C master station with a secondary station is called the __________.
N a. focus line Y b. base line N c. side line N d. center line 172: A chart with a scale of 1:45,000 is a __________.
Y a. harbor chart N b. coast chart N c. general chart N d. sailing chart 203: In any Loran-C chain, there are three or more stations transmitting pulses which radiate in all directions. One of the stations is the master station, and the others in the chain are the __________.
N a. radio stations Y b. secondary stations N c. monitor stations N d. pulse stations 270: You are entering port and have been instructed to anchor, as your berth is not yet available. You are on a SW'ly heading, preparing to drop anchor, when you observe the range lights as shown on your starboard beam. You should __________. (D047NG )
N a. drop the anchor immediately as the range lights mark an area free of obstructions N b. drop the anchor immediately as a change in the position of the range lights will be an indication of dragging anchor Y c. ensure your ship will NOT block the channel or obstruct the range while at anchor N d. NOT drop the anchor until the lights are in line 271: Your vessel is leaving New York harbor in dense fog. As the vessel slowly proceeds toward sea, you sight a green can buoy on the starboard bow. Which action should you take?
N a. Turn hard right to get back into the channel. N b. Pass the buoy close to, leaving it to your port. N c. Stop and fix your position. Y d. Stand on, leaving the buoy to your starboard. 340: Information about the direction and velocity of rotary tidal currents is found in the __________.
N a. Mariner's Guide N b. Nautical Almanac N c. Tide Tables Y d. Tidal Current Tables 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 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 441: A yellow buoy may exhibit a(n) __________.
N a. fixed red light Y b. flashing light N c. white light N d. occulting light 487: What will be the time after 0600 (ZD +3), on 6 March 1983, that the height of the tide at Puerto Rosales, Argentina, will be 9.0 feet (2.7 meters)?
N a. 0740 N b. 0754 N c. 0840 Y d. 0922 575: The horizontal plane, perpendicular to the zenith-nadir axis, that intersects with the celestial sphere and is tangent to the earth is called the __________.
N a. celestial horizon N b. sensible horizon N c. visible horizon Y d. geoidal horizon 679: A tropical wave is usually preceded by __________.
N a. tropical storms Y b. good weather N c. heavy rain and cloudiness N d. heavy seas 713: The closest point of approach (CPA) of a contact on a relative motion radar may be determined __________.
N a. immediately when the contact is noted on radar N b. only if the radar scope is watched constantly Y c. after the contact has been marked at least twice N d. by an occasional glance at the radar 861: You would expect to find channels marked with the IALA-A Buoyage System in __________.
N a. Argentina N b. Japan Y c. India N d. Canada 950: Where is the dangerous semicircle located on a hurricane in the Southern Hemisphere?
Y a. To the left of the storm's track N b. To the right of the storm's track N c. In the high pressure area N d. On the south side 1000: 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 )
Y a. Continue on course until the range is closed, then alter course to the right. N b. Continue on the present heading until the range is in line, then alter course to the left. N c. Immediately alter course to the right to bring the range in line. N d. Immediately alter course to 309°T to bring the range in line. 1059: The Light List shows that a navigational light has a nominal range of 17 miles and a height above water of 28 feet (8.5 meters). Your height of eye is 32 feet (9.8 meters) and the visibility is 11.0 miles. At what approximate range will you first sight the light?
N a. 11.0 miles Y b. 12.6 miles N c. 15.7 miles N d. 18.0 miles 1099: You are enroute to assist vessel A. Vessel A is underway at 6 knots on course 133°T, and bears 343°T at 92 miles from you. What is the course to steer at 9 knots to intercept vessel A?
N a. 356° Y b. 003° N c. 022° N d. 038° 1108: Preferred channel buoys indicate the preferred channel to transit by __________.
N a. odd or even numbers Y b. the color of their top band N c. the location of the buoy in the channel junction N d. the buoy's light rhythms 1109: You are on course 146°T. To check the speed of your vessel you should observe a celestial body on which bearing?
N a. 000° N b. 056° N c. 090° Y d. 146° 1158: What type of cloud is indicated by the number 5 in illustration D039NG? (D039NG )
N a. Cirrostratus N b. Cirrocumulus Y c. Altocumulus N d. Nimbostratus 1231: Some lights used as aids to marine navigation have a red sector to indicate a danger area. How are the limits of a colored sector of light listed in the Light List?
N a. Geographical positions outlining the area of the sector N b. True bearings as observed from the light toward a vessel Y c. True bearings as observed from a vessel toward the light N d. Bearings given in the Light List are always magnetic 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 1241: Which picture shows a fixed and flashing light? (D034NG )
Y a. A N b. B N c. C N d. D 1253: The horizontal angle between the magnetic meridian and the north-south line of the magnetic compass is __________.
Y a. deviation N b. variation N c. compass error N d. dip 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 1365: The same side of the Moon is always toward the Earth, but more than half of its surface has been seen due to libration. Libration in latitude occurs because __________.
Y a. the axis of rotation is tilted about 6.5° to the axis of revolution N b. the speed of revolution varies, while the rotational speed is essentially constant N c. of the rotational oscillation of the Moon with respect to its radius vector N d. of augmentation 1369: Which of the following is the most useful factor for predicting weather?
N a. The present reading of the barometer N b. The previous reading of the barometer N c. The difference in the barometric readings within the past 24 hours Y d. The rate and direction of change of barometric readings 1378: The latitude of the upper vertex of a great circle is 36°N. What is the latitude of the lower vertex?
N a. 36°N N b. 0° Y c. 36°S N d. Cannot be determined from the information given 1404: A great circle will intersect the equator at how many degrees of longitude apart?
N a. 0° N b. 45° N c. 90° Y d. 180° 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 1493: You are running parallel to the coast and estimate that the current is against you. In plotting a running fix using bearings from the same object on the coast, the greatest safety margin from inshore dangers will result if what speed is used to determine the fix?
Y a. Minimum speed estimate N b. Maximum speed estimate N c. Average speed estimate N d. A running fix should not be used under these conditions. 1530: In shallow water, waves that are too steep to be stable, causing the crests to move forward faster than the rest of the wave, are called __________.
N a. rollers Y b. breakers N c. white caps N d. surfers 1538: The winds of the "roaring forties" are strongest near __________.
N a. 40°N N b. 50°N N c. 40°S Y d. 50°S 1576: You are entering an east coast port and see a buoy with a yellow triangle painted on it. This indicates __________.
Y a. you are in the vicinity of the ICW N b. the buoy is a special mark N c. the buoy is off station N d. the buoy designates a sharp turn in the channel 1581: Shown are the symbols used on radio facsimile weather charts. The symbol indicated at letter "I" represents __________. (D042NG )
N a. rain showers Y b. thunderstorms N c. snow storms N d. sand storms 1585: The sidereal day begins when the __________.
Y a. first point of Aries is over the upper branch of the reference meridian N b. Sun is over the lower branch of the reference meridian N c. Sun is over the upper branch of the reference meridian N d. first point of Aries is over the lower branch of the reference meridian 1654: Which weather element cannot be measured accurately while on board a moving vessel?
Y a. Visibility N b. Temperature N c. Wind direction N d. Atmospheric pressure 1764: What natural feature is responsible for the rather even climate found on the Florida peninsula throughout the year?
N a. Strong masses of continental air Y b. The Gulf Stream N c. The Bermuda high N d. The cool waters of the Sargasso sea 1842: What is the major problem with taking high altitude observations?
N a. Possible errors due to unusual refraction may exist. N b. The tables are not as accurate due to inherent errors in the spherical triangle at high altitudes. N c. Rapidly changing altitudes make it difficult to get an accurate altitude. Y d. It is difficult to establish the point where the sextant is vertical to the horizon. 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 2150: On a Mercator chart, 1 nautical mile is equal to __________.
N a. 1 minute of longitude N b. 1 degree of longitude Y c. 1 minute of latitude N d. 1 degree of latitude 2164: The line connecting the points of the earth's surface where there is no dip is the __________.
N a. agonic line Y b. magnetic equator N c. isodynamic N d. isopor 2200: Cloud formations are minimal when the __________.
Y a. surface temperature and temperature aloft are equal N b. surface temperature and temperature aloft differ greatly N c. barometric pressure is very low N d. relative humidity is very high 2236: Which is TRUE of a downbound power-driven vessel, when meeting an upbound vessel on the Western Rivers?
N a. She has the right of way. N b. She shall propose the manner of passage. N c. She shall initiate the maneuvering signals. Y d. All of the above 2240: If you observe a buoy off station you should __________.
N a. fill out and mail CG Form 2692 to the nearest Coast Guard office N b. appear in person at the nearest Coast Guard office N c. notify Coast Guard Headquarters in Washington, DC Y d. immediately contact the nearest Coast Guard office by radiotelephone 2332: Magnetic dip is a measurement of the angle between the __________.
N a. geographic pole and the magnetic pole N b. lubber's line and true north Y c. horizontal and the magnetic line of force N d. compass heading and the magnetic heading 2480: You are on course 277°T and take a relative bearing of a lighthouse of 045°. What is the true bearing to the lighthouse?
N a. 038° N b. 232° N c. 315° Y d. 322° 2518: In low latitudes, the full Moon will always rise at about __________.
N a. sunrise N b. 1200 LMT Y c. sunset N d. 2400 LMT 2589: Under the IALA cardinal system, a mark with a quick white light showing 6 flashes followed by one long flash indicates that the safest water is on the __________.
N a. north side of the mark N b. west side of the mark N c. east side of the mark Y d. south side of the mark 2618: You must draw a plotting sheet covering latitudes 38°N to 43°N and longitudes 179°E to 178°W. If the distance between each degree of longitude is 5 inches, what is the distance between latitude 38°N and latitude 43°N?
N a. 29.0 inches N b. 29.6 inches N c. 32.1 inches Y d. 32.8 inches 2800: Where is the pivot point of a towboat with a tow ahead?
N a. One-third the length of the combined unit forward of the towboat Y b. One-third the length of the combined unit back from the head N c. At the head of the towboat N d. One-half the length of the combined unit 2822: While navigating in fog off a coastline of steep cliffs, you hear the echo of the ships fog horn 2 seconds after the signal was sounded. What is the distance to the shore?
Y a. 360 yards N b. 320 yards N c. 280 yards N d. 140 yards 2900: Who should be consulted for changing conditions of controlling depths in major channels?
N a. U.S. Coast Guard N b. National Geospatial-Intelligence Agency N c. National Ocean Service Y d. U.S. Army Corps of Engineers 2940: On the Corps of Engineer's Navigation Maps, the channel is __________.
N a. midway between the banks N b. indicated by depths (in feet) Y c. indicated by a broken line N d. not indicated 2982: You take a bearing of 142° and 259° of two objects. What bearing of a third object will give the best fix? -
Y a. 019° N b. 084° N c. 166° N d. 281° 3004: While navigating in fog off a coastline of steep cliffs, you hear the echo of the ship's fog horn 4 seconds after the signal was sounded. What is the distance to the shore?
N a. 209 yards N b. 363 yards N c. 480 yards Y d. 730 yards 3074: ECDIS must give an alarm for which of the following cases?
N a. When the speed of a dangerous target exceeds a set limit Y b. When the specified limit for deviation from the planned route is exceeded N c. If the ship's ETA has changed beyond the set limit N d. None of the above