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.
49: While steering a course of 150°T, you wish to observe a body for a latitude check. What would the azimuth have to be?
Y a. 000°T N b. 090°T N c. 150°T N d. 240°T 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 107: The average height of the surface of the sea for all stages of the tide over a 19 year period is called __________.
N a. mean high water N b. mean low water N c. half-tide level Y d. mean sea level 111: Green lights may appear on __________.
Y a. horizontally banded buoys N b. vertically striped buoys N c. yellow buoys N d. spherical buoys 143: Under the IALA - A Buoyage System, a buoy used as a port hand mark would not show which light characteristic?
N a. Isophase N b. Quick flashing N c. Long flashing Y d. Group Flashing (2 + 1) 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 446: The usual sequence of directions in which a tropical cyclone moves in the Southern Hemisphere is __________.
N a. northwest, west, and south Y b. southwest, south, and southeast N c. north, northwest, and east N d. west, northwest, and north 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 498: What is an advantage of the magnetic compass aboard vessels?
N a. Compass error is negligible at or near the earth's magnetic poles. N b. It does not have to be checked as often. Y c. It is reliable due to it's essential simplicity. N d. All points on the compass rose are readily visible. 515: The small circle of the celestial sphere parallel to the celestial equator, and transcribed by the daily motion of the body, is called the __________.
N a. hour circle of the body Y b. parallel of declination N c. vertical circle of the body N d. parallel of altitude 548: When the declination of the Moon is 0°12.5'S, you can expect some tidal currents in Gulf Coast ports to __________.
N a. have either a double ebb or a double flood N b. become reversing currents Y c. become weak and variable N d. exceed the predicted velocities 685: Thirty-two meters equals __________.
N a. 17.50 feet N b. 58.52 feet N c. 96.00 feet Y d. 104.99 feet 775: A sidereal day is shorter than a solar day. This difference is due to __________.
N a. irregularities in the daily rotational rate of the Sun N b. the space motion of the solar system N c. the precession of the equinoxes Y d. the use of different reference points 839: When using a radar in an unstabilized mode, fixes are determined most easily from __________.
Y a. ranges N b. center bearings N c. tangent bearings N d. objects that are close aboard 841: Under the IALA-A Buoyage system, a buoy marking the port hand of the channel when approaching from seaward may NOT have a __________.
N a. red light Y b. conical shape N c. group-flashing light N d. square topmark 862: The U.S. Coast Guard publishes __________.
Y a. Light Lists N b. U.S. Coast Pilots N c. Radio Navigational Aids N d. All of the above 939: That half of the hurricane to the right hand side of its track (as you face the same direction that the storm is moving) in the Northern Hemisphere is called the __________.
N a. windward side N b. leeward side N c. safe semicircle Y d. dangerous semicircle 993: When crossing the magnetic equator the __________.
N a. Flinders bar should be inverted Y b. heeling magnet should be inverted N c. the quadrantal spheres should be rotated 180° N d. Flinders bar should be moved to the opposite side of the binnacle 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 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° 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 1222: On entering from seaward, a starboard side daymark will __________.
N a. show a fixed red light if lighted N b. show a Morse (A) white light N c. be square in shape Y d. have an even number if numbered 1242: Daymarks marking the starboard side of the channel when going towards the sea are __________.
Y a. green squares N b. green triangles N c. red squares N d. red triangles 1243: Magnetic heading differs from compass heading by __________.
N a. compass error N b. true heading N c. variation Y d. deviation 1282: Entering from sea, a daymark on the port side of the channel would be indicated on a chart by a __________.
N a. red triangle with the letter R N b. white triangle with the letters RG Y c. green square with the letter G N d. white square with the letters GR 1304: The distance to the nearest vertex from any point on a great circle track cannot exceed __________.
Y a. 5400 nautical miles N b. 5840 nautical miles N c. 6080 nautical miles N d. 10,800 nautical miles 1322: What will be the velocity of the tidal current at Grant's Tomb, 123rd Street, NY, NY, at 1412 EST (ZD +5) on 22 March 1983?
N a. 0.5 knot N b. 0.8 knot Y c. 1.1 knots N d. 1.3 knots 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 1436: Fog forms when the air __________.
N a. is 50% water saturated N b. is 90% water saturated N c. temperature is greater than the dew point temperature Y d. temperature is equal to, or below the dew point temperature 1445: The planet Mars will have its greatest magnitude when at __________.
N a. conjunction Y b. opposition N c. east quadrature N d. west quadrature 1468: What is NOT an advantage of the rhumb line track over a great circle track?
N a. Easily plotted on a Mercator chart N b. Negligible increase in distance on east-west courses near the equator N c. Does not require constant course changes Y d. Plots as a straight line on Lambert conformal charts 1490: In the IALA Buoyage System, preferred-channel-to-port or preferred-channel-to-starboard buoys, when fitted with lights, will show a __________.
N a. quick flashing light N b. long flashing light Y c. composite group flashing (2 + 1) light N d. group flashing 1507: When you are steering on a pair of range lights and find the upper light is above the lower light you should __________.
N a. come right N b. come left N c. wait until the lights are no longer in a vertical line Y d. continue on the present course 1540: You are sailing south on the Intracoastal Waterway (ICW) when you sight a green can buoy with a yellow square painted on it. Which of the following is TRUE?
N a. You should pass the buoy close aboard on either side. N b. The buoy marks the end of the ICW in that area. Y c. You should leave the buoy to port. N d. The yellow square is retroreflective material used to assist in sighting the buoy at night. 1600: Zenith distance is equal to __________.
Y a. 90° - Ho N b. 90° - d N c. Ho° + d N d. 90° - z 1693: A phenomenon where the atmospheric pressure is higher than that of other surrounding regions is called __________.
N a. the "trade winds" N b. a low front or an occluded front Y c. a high pressure area; an anticyclone; or a "high" N d. the "doldrums" 1713: When a tornado moves over the water from land it is called a __________.
N a. tornado Y b. waterspout N c. hurricane N d. cyclone 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 1830: A vessel heading NNW is on a course of __________.
N a. 274.5° N b. 292.0° N c. 315.5° Y d. 337.5° 1910: What sextant correction corrects the apparent altitude to the equivalent reading at the center of the Earth?
N a. Phase Y b. Parallax N c. Semidiameter N d. Augmentation 1940: The diameter of the Sun and Moon as seen from the Earth varies slightly but averages about __________.
N a. 1' N b. 52' Y c. 32' N d. 15.5' 1961: What kind of pressure systems travel in tropical waves?
N a. Subsurface pressure N b. Terrastatic pressure N c. High pressure Y d. Low pressure 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 2085: Information about major breakdowns, repairs, or other emergency operations with regard to weirs and (or) wicket dams, on the western rivers, may be obtained from the __________.
Y a. Broadcast Notice to Mariners N b. Light List Vol. V N c. U.S. Coast Pilot N d. Sailing Directions 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 2175: 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, which light(s) will be shown at D if the lock walls and piers are not awash?
N a. One amber light Y b. One red light N c. Two red lights N d. Three red lights 2246: The speed of an ocean current is dependent on __________.
Y a. the density of the water N b. the air temperature N c. the presence of a high pressure area near it N d. underwater soil conditions 2268: What condition exists at perigee?
N a. The Earth is farthest from the Sun. N b. The Earth, Sun, and Moon are in line. N c. The Earth, Sun, and Moon are at right angles. Y d. The Moon is closest to the Earth. 2319: In low latitudes, the new Moon will always rise at about __________.
Y a. sunrise N b. 1200 LMT N c. sunset N d. 2400 LMT 2499: The "head of the bend" is the __________.
Y a. top or upstream beginning of a bend N b. bottom or downstream beginning of a bend N c. midpoint or center radius of a bend N d. center line or apex of a bend 2625: Stormy weather is usually associated with regions of __________.
N a. high barometric pressure N b. changing barometric pressure Y c. low barometric pressure N d. steady barometric pressure 2648: The 3-cm radar as compared to a 10-cm radar with similar specifications will __________.
N a. give better range performance in rain, hail, etc. N b. display small targets in a mass of dense sea clutter at a greater range N c. have less sea return in choppy rough seas Y d. display a more maplike presentation for inshore navigation 2709: Under the IALA-B Buoyage System, when entering from seaward a lateral system buoy to be left to port may display which of the topmarks shown? (D046NG )
N a. A N b. B N c. C Y d. D 2737: A lateral system buoy displaying a quick light __________.
N a. should be passed close aboard on either side Y b. indicates that special caution is required N c. is used at a channel bifurcation or junction N d. is painted with red and white vertical stripes 2788: The Light List indicates that a dayboard is a type KGW. You should __________.
N a. see a green and white diamond N b. leave it to port when southbound on the Atlantic Coast ICW N c. pass it close aboard on either side Y d. look for another daymark to form the range 2790: A towboat has the same draft as the barges it is pushing ahead. If the distance from the stern of the towboat to the head of the tow is 800 feet, where is the approximate location of the pivot point of the unit?
N a. At the head of the tow Y b. 250 feet from the head of the tow N c. 400 feet from the head of the tow N d. 600 feet from the head of the tow 2794: The standard atmospheric pressure in millibars is __________.
N a. 760.0 N b. 938.9 N c. 1000.0 Y d. 1013.2 2896: You are navigating in pilotage waters. The maximum time between fixes should be about __________.
N a. 5 minutes Y b. 30 minutes N c. 1 hour N d. 4 hours 3039: As you enter a U.S. channel from seaward the numbers on the buoys __________.
N a. increase with the can buoys being even numbered Y b. increase with the can buoys being odd numbered N c. decrease with the can buoys being even numbered N d. increase in channels going to the north or west, and decrease in channels going to the south or east 3116: With respect to automatic identification systems (AIS), which information is expected to be broadcast every 1 to 10 seconds?
N a. Name of ship Y b. Ship's heading N c. IMO number N d. Vessel's draft