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.
29: You are approaching a multiple-span bridge at night. The main navigational channel span will be indicated by __________.
N a. a quick flashing red or green aid to navigation N b. a steady blue light in the center of the span Y c. 3 white lights in a vertical line in the center of the span N d. a flashing green light in the center of the span 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 87: A tide is called diurnal when __________.
Y a. only one high and one low water occur during a lunar day N b. the high tide is higher and the low tide is lower than usual N c. the high tide and low tide are exactly six hours apart N d. two high tides occur during a lunar day 157: Tropic tides are caused by the __________.
Y a. Moon being at its maximum declination N b. Moon crossing the equator N c. Sun and Moon both being near 0° declination N d. Moon being at perigee 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 207: An important lunar cycle affecting the tidal cycle is called the nodal period. How long is this cycle?
N a. 16 days N b. 18 days N c. 6 years Y d. 19 years 211: The light rhythm of Morse (A) is shown on __________.
N a. preferred-channel buoys N b. starboard- or port-side buoys N c. special marks Y d. safe water buoys 262: Which of the buoy symbols shown indicates a safe water mark? (D032NG )
N a. A N b. B N c. C Y d. D 299: Steady precipitation is typical of __________.
N a. coming cold weather conditions Y b. a warm front weather condition N c. high pressure conditions N d. scattered cumulus clouds 305: IN REGION A of the IALA Buoyage System, when entering from seaward, the port side of a channel would be marked by a __________.
Y a. red can buoy N b. black can buoy N c. red conical buoy N d. black conical buoy 312: The depth of water on a chart is indicated as 23 meters. This is equal to __________.
N a. 11.5 fathoms Y b. 12.6 fathoms N c. 69.0 feet N d. 78.6 feet 374: There are seven sources of error in the marine sextant. Of the four errors listed, which one is adjustable?
Y a. Error of collimation N b. Prismatic error N c. Graduation error N d. Centering error 399: Where will you find information about the duration of slack water?
N a. American Practical Navigator N b. Sailing Directions N c. Tide Tables Y d. Tidal Current Tables 415: If the Sun's observed altitude is 54°30', what is the zenith distance?
Y a. 35°30' N b. 45°30' N c. 12°30' N d. 14°30' 491: A special purpose buoy shall be __________.
N a. lighted with a white light N b. striped black and red N c. lighted with a red light Y d. yellow 505: The error in the measurement of the altitude of a celestial body, caused by refraction, increases as the __________.
N a. horizontal parallax decreases N b. observer's height above sea level increases N c. humidity of the atmosphere decreases Y d. altitude of the body decreases 514: What instrument measures wind velocity?
N a. Hydrometer N b. Barometer N c. Psychrometer Y d. Anemometer 551: Spoil grounds, anchorage areas, cable areas, and military exercise areas are all marked by yellow buoys. Which special mark on the buoy will indicate the specific area you are in?
N a. A topmark triangular in shape N b. A topmark spherical in shape Y c. Lettering on the buoy N d. A topmark consisting of two cones with the points up 592: To measure distance on a Mercator chart between the parallels of LAT 34°30'N and LAT 31°30'N, which 30 mile scale should be used?
N a. 33°00'N to 33°30'N N b. 32°30'N to 33°00'N Y c. 32°45'N to 33°15'N N d. 32°15'N to 32°45'N 630: What kind of weather would you expect to accompany the passage of a tropical wave?
Y a. Heavy rain and cloudiness N b. Good weather N c. A tropical storm N d. Dense fog 686: The pressure gradient between the horse latitudes and doldrums runs __________.
N a. east to west Y b. north to south N c. northeast to southwest N d. northwest to southeast 717: Which term refers to the direction a current is flowing?
Y a. Set N b. Drift N c. Vector direction N d. Stand 723: If there is any doubt as to the proper operation of a radar, which statement is TRUE?
N a. Only a radar expert can determine if the radar is operating. N b. All radars have indicator lights and alarms to signal improper operation. Y c. A radar range compared to the actual range of a known object can be used to check the operation of the radar. N d. The radar resolution detector must be energized to check the radar. 764: Magnetic variation changes with a change in __________.
N a. the vessel's heading N b. sea conditions N c. seasons Y d. the vessel's position 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. 500 874: Altocumulus clouds are defined as __________.
N a. high clouds Y b. middle clouds N c. low clouds N d. vertical development clouds 1002: What publication contains information about the port facilities in Cadiz, Spain?
Y a. World Port Index N b. United States Coast Pilot N c. Nautical Index N d. Sailing Directions 1039: While taking weather observations, you determine that the wind is coming from the west. In the weather log, you would record the wind direction as __________.
N a. 000° N b. 090° N c. 180° Y d. 270° 1136: When a warm air mass overtakes and replaces a cold air mass, the contact surface is called a(n) __________.
Y a. warm front N b. cold front N c. line squall N d. occluded front 1142: Which weather conditions would you expect to find 100 miles East of position "B"? (D049NG )
N a. Winds NW at 20.5 knots, steady warm temperature, high seas N b. Winds calm, falling temperature, clear skies, high seas Y c. Winds WSW, steady temperature, scattered clouds, moderate seas N d. None of the above 1205: How is the annual rate of change for magnetic variation shown on a pilot chart?
Y a. Gray lines on the uppermost inset chart N b. Red lines on the main body of the chart N c. In parenthesis on the lines of equal magnetic variation N d. Annual rate of change is not shown. 1207: What will be the velocity of the tidal current at New London Harbor Entrance, CT, at 1615 EST (ZD +5) on 26 December 1983?
Y a. 0.2 knot N b. 0.4 knot N c. 0.7 knot N d. 0.9 knot 1232: Entering from seaward, triangular-shaped daymarks are used to mark __________.
Y a. the starboard side of the channel N b. the centerline of the channel N c. an obstruction where the preferred channel is to starboard N d. special purpose areas 1250: Daylight savings time is a form of zone time that adopts the time __________.
Y a. one zone to the east N b. one zone to the west N c. two zones to the east N d. two zones to the west 1268: On a nautical chart, the inner ring of a compass rose indicates __________.
N a. true directions N b. compass error N c. deviation Y d. magnetic directions 1320: You are enroute to Savannah, GA, from Recife, Brazil. There is a strong 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. smoother seas and warmer water N c. cirrus clouds N d. long swells 1336: On the approach of a warm front, barometric pressure usually __________.
Y a. falls N b. is steady N c. is uncertain N d. rises 1435: Inferior conjunction is possible for __________.
N a. Mars Y b. Venus N c. Saturn N d. Jupiter 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 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 1487: At the approaches to Savannah, GA, with the wind coming out of the west, the wind-driven current will be flowing approximately __________.
Y a. 080° N b. 100° N c. 260° N d. 280° 1520: The diurnal inequality of the tides is caused by __________.
Y a. the declination of the Moon N b. changing weather conditions N c. the Moon being at apogee N d. the Moon being at perigee 1558: As a high pressure system approaches, the barometer reading __________.
N a. stays the same N b. falls Y c. rises N d. falls rapidly 1664: Ascending and descending air masses with different temperatures is part of an important heat transmitting process in our atmosphere called __________.
N a. conduction N b. radiation Y c. convection N d. barometric inversion 1718: A hurricane is characterized by winds of __________.
N a. up to 33 knots N b. 34 to 47 knots N c. 48 to 63 knots Y d. 64 knots or greater 1987: An instrument useful in predicting fog is the __________.
Y a. sling psychrometer N b. microbarograph N c. anemometer N d. aneroid barometer 2020: A vessel heading ENE is on a course of __________.
N a. 022.5° N b. 045.0° Y c. 067.5° N d. 090.0° 2049: At morning stars, the first stars that should be observed are those with an azimuth in which quadrant?
Y a. Eastern N b. Southern N c. Western N d. Northern 2163: The letter C in illustration D006NG represents the __________.
N a. visible horizon N b. geoidal horizon Y c. celestial horizon N d. sensible horizon 2189: 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?
N a. If the blue ends are to port and the athwartships tray is at the bottom, you should add some more magnets. N b. If the blue ends are to port and the athwartships tray is at the top, you should add some more magnets. N c. If the red ends are to port, you should lower the athwartships tray. Y d. If the red ends are to port and the tray is at the bottom, you should raise the tray. 2191: The chart indicates the variation was 3°45'E in 1988, and the annual change is increasing 6'. If you use the chart in 1991 how much variation should you apply?
N a. 3°27'E N b. 3°27'W N c. 3°45'E Y d. 4°03'E 2242: A vessel is heading magnetic north and its magnetic compass indicates a heading of 356°. Which action should be taken to remove this error during compass adjustment?
Y a. If the red ends of the magnets are to port you should lower the athwartships tray. N b. If the red ends of the magnets are aft you should raise the fore-and-aft tray. N c. If the blue ends of the magnets are to port, and the athwartships tray is at the top, you should remove some of the magnets. N d. If the blue ends of the magnets are aft you should raise the fore-and-aft tray. 2308: The points where the Sun is at 0° declination are known as __________.
N a. solstices Y b. equinoxes N c. perigee N d. apogee 2414: You must construct a Mercator plotting sheet on a piece of paper measuring 20" by 28". The area includes latitude 38°S to 43°S and longitude 178°E to 175°W. Allow a one-half inch neat line on all sides. What is the maximum distance between each degree of longitude that will permit the area of the plotting sheet to be drawn within the stated limitations?
N a. 2.6 inches Y b. 2.9 inches N c. 3.2 inches N d. 3.5 inches 2438: The radar control that reduces weak echoes out to a limited distance from the ship is the __________.
Y a. sensitivity time control (sea-clutter control) N b. receiver gain control N c. brilliance control N d. fast time constant (differentiator) 2468: Under the U.S. Aids to Navigation System on the Western Rivers, the buoys marking the starboard side of the channel when going upstream will be __________.
N a. black Y b. red N c. green N d. yellow 2578: You must draw a plotting sheet covering latitudes 49°N to 53°N and longitudes 179°E to 178°W. If the distance between latitude 49°N to 53°N is 16 inches, what is the distance between the meridians of 1° of longitude?
N a. 2.12 inches N b. 2.33 inches Y c. 2.56 inches N d. 2.81 inches 2722: The paths of intended travel between three or more points is the __________.
N a. course Y b. track N c. bearing N d. course over the ground 2780: You are pushing a tow ahead and passing close to another towboat which is pushing ahead in the same direction (you are overtaking). After the towheads pass close alongside __________.
N a. you will gain speed N b. both boats will gain speed N c. the tows will tend to drift apart Y d. the tows will tend to drift together 3076: An ECDIS is required to display which information?
N a. Radar targets N b. ARPA vectors Y c. Hydrographic data N d. All of the above