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.
130: The distance between the surface of the water and the tidal datum is the __________.
N a. range of tide Y b. height of tide N c. charted depth N d. actual water depth 165: On 6 July 1981, at 1000 zone time, you cross the 180th meridian steaming westward. What is your local time?
N a. It is 1000, 5 July. N b. It is 1000, 6 July. N c. It is 2200, 7 July. Y d. It is 1000, 7 July. 248: What is the index error of sextant A in illustration D050NG? (D050NG )
N a. 0° 10' off the arc N b. 0° 10' on the arc N c. 3° 00' off the arc Y d. 4° 20' off the arc 287: The datum from which the predicted heights of tides are reckoned in the tide tables is the same as that used for the charts of the locality. The depression of the datum below mean sea level for Hampton Roads, Virginia is __________.
N a. between -.7 and +.5 feet N b. between 1.9 and 3.2 feet N c. 4.1 feet Y d. 1.2 feet 365: The Sun at a maximum declination north would be approximately at __________.
Y a. aphelion N b. perihelion N c. autumnal equinox N d. first point of Aries 392: A pilot chart does NOT contain information about __________.
N a. average wind conditions Y b. tidal currents N c. magnetic variation N d. average limits of field ice 470: You are underway on course 120°T and can make 12 knots. The eye of a hurricane bears 150°T at 120 miles. The hurricane is on course 295° at 20 knots. What course should you steer at 12 knots to have the maximum CPA?
N a. 312° N b. 330° Y c. 348° N d. 001° 479: 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?
Y a. 114° N b. 158° N c. 295° N d. 340° 495: A semidiameter correction is applied to observations of __________.
N a. Mars Y b. the Moon N c. Jupiter N d. All of the above 514: What instrument measures wind velocity?
N a. Hydrometer N b. Barometer N c. Psychrometer Y d. Anemometer 525: In the celestial equator system of coordinates, what is comparable to latitude on the terrestrial sphere?
N a. Altitude N b. Right ascension N c. Celestial meridians Y d. Declination 526: When a hurricane passes over colder water or land and loses its tropical characteristics, the storm becomes a(n) __________.
N a. high pressure area Y b. extratropical low-pressure system N c. tropical storm N d. easterly wave 531: You have been informed that dredging operations may be underway in your vicinity. Which buoy indicates the dredging area?
N a. White buoy with a green top N b. White and international orange buoy Y c. Yellow buoy N d. Yellow and black vertically-striped buoy 572: You wish to measure the distance on a Mercator chart between a point in latitude 43°30'N and a point in latitude 40°30'N. To measure 30 miles at a time, you should set the points of the dividers at __________.
N a. 41°30' and 42°00' Y b. 41°45' and 42°15' N c. 42°00' and 42°30' N d. 42°15' and 42°45' 582: Distance along a track line is measured on a Mercator chart by using the __________.
Y a. latitude scale near the middle of the track line N b. longitude scale near the middle of the track line N c. latitude scale at the mid-latitude of the chart N d. latitude or longitude scale at the middle of the scale 633: You have another ship overtaking you close aboard to starboard. You have 3 radar targets bearing 090° relative at ranges of .5 mile, 1 mile, and 1.5 miles. In this case, the unwanted echoes are called __________.
Y a. multiple echoes N b. spoking N c. indirect echoes N d. side-lobe echoes 648: Weather systems in the middle latitudes generally travel from __________.
N a. north to south Y b. west to east N c. east to west N d. None of the above 658: Monsoons are characterized by __________.
N a. light, variable winds with little or no humidity N b. strong, gusty winds that blow from the same general direction all year Y c. steady winds that reverse direction semiannually N d. strong, cyclonic winds that change direction to conform to the passage of an extreme low pressure system 670: A NAVAREA warning carries the following number; 1986/87 (11). Which statement is TRUE?
N a. The warning was issued in 1986, the 87th sequentially numbered warning and broadcast 11 times. Y b. This is warning number 1986 issued in 1987, and it affects sub-region 11. N c. This warning is valid in 1986 and 1987 and is the eleventh two-year warning. N d. The subject of this warning first appeared in 1986; this warning is in 1987 and is the eleventh on this topic. 726: Atmospheric pressure at sea level is equal to __________.
N a. 14.7 pounds per square inch N b. 29.92 inches of mercury N c. 1013.25 millibars Y 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 886: The circulation around a low pressure center in the Northern Hemisphere is __________.
Y a. counterclockwise N b. variable N c. clockwise N d. anticyclonic 907: In which month will the equatorial counter current be strongest?
N a. January N b. April Y c. August N d. October 1040: An occluded front is usually caused by a __________.
N a. cold front becoming stationary N b. warm front becoming stationary Y c. cold front overtaking a warm front N d. warm front dissipating 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 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 1154: The speed at which an ocean wave system advances is called __________.
N a. wave length N b. ripple length Y c. group velocity N d. wave velocity 1204: Which of the symbols in illustration DO18NG designates a stationary front? (D018NG )
Y a. A N b. B N c. C N d. D 1210: You are inbound in a channel marked by a range. The range line is 309°T. You are steering 306°T and have the range in sight as shown. The range continues to open. What action should you take? (D047NG )
N a. Alter course to the right to 309°T or more to bring the range in line. N b. Maintain course as it is normal for the range to open as you get close. Y c. Alter course to the left until the range closes, then steer to the left of 306°T. N d. Alter course to the left to close the range, then alter course to 309°T. 1234: Which information does the outer ring of a compass rose on a nautical chart provide?
N a. Variation Y b. True directions N c. Magnetic directions N d. Annual rate of variation change 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. 1412: The distance between the surface of the water and the tidal datum is the __________.
N a. actual water depth N b. range of tide N c. charted depth Y d. height of tide 1485: The safest and most prudent procedure to follow while navigating in the vicinity of a tropical cyclone is to __________.
Y a. take positive steps to avoid it if possible N b. batten down and prepare to ride out the storm N c. continue to navigate farther from the coast N d. always navigate towards the coast by the most direct route 1551: In order to get the maximum benefit from the Gulf Stream, on a voyage between Houston and Philadelphia, you should navigate __________.
Y a. about 75 miles east of Ormond Beach, FL N b. close inshore between Jupiter Inlet and Fowey Rocks, FL N c. along the 50-fathom curve while off the east coast of Florida N d. about 10 miles east of Cape Canaveral, FL 1560: Under the IALA-A and B Buoyage Systems, a buoy with alternating red and white vertical stripes indicates __________.
Y a. that there is navigable water all around N b. an isolated danger exists N c. that the preferred channel is to port N d. that the preferred channel is to starboard 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 1647: Cumulonimbus clouds are formed by __________.
Y a. vertical air movements N b. heavy rainstorms N c. horizontal air movements N d. any movement of moist air 1684: Which type of frontal passage is associated with a relatively narrow band of precipitation?
Y a. A cold front N b. A warm front N c. A stationary front N d. None of the above 1728: If a hurricane several hundred miles away is moving in your general direction your barometer would __________.
N a. start to rise rapidly Y b. start to fall gradually N c. rise slowly, begin "pumping" and then start a slow, steady fall N d. remain steady 1874: Lighted white and orange buoys must show which color light?
N a. Orange N b. Red N c. Alternating yellow and white Y d. White 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' 1962: When outbound from a U.S. port, a buoy displaying a flashing red light indicates __________.
Y a. the port side of the channel N b. a sharp turn in the channel to the right N c. a junction with the preferred channel to the left N d. a wreck to be left on the vessel's starboard side 1989: In the horizon system of coordinates what is the equivalent to the meridians on the Earth?
N a. Horizon N b. Hour circle Y c. Vertical circles N d. Celestial meridians 2043: Stormy weather is usually associated with regions of __________.
N a. changing barometric pressure N b. high barometric pressure N c. steady barometric pressure Y d. low barometric pressure 2067: The Light List indicates that a light has a nominal range of 10 miles and is 11 feet high. If the visibility is 5 miles and your height of eye is 20 feet, at what approximate distance will you sight the light?
Y a. 6.3 miles N b. 7.4 miles N c. 8.4 miles N d. 9.0 miles 2113: Vessels regularly navigating rivers above Cairo, Illinois, shall at all times have on board a copy of __________.
Y a. U.S. Army Corps of Engineers Regulations (Blue Book) N b. Nautical Almanac for the year N c. Sailing Directions N d. Light List Vol. V 2186: You have completed the magnetic compass adjustments on magnetic east and magnetic south. The vessel is now steady on magnetic west but the compass reads 266°. What action should be taken?
N a. Adjust the compass with the athwartships magnets until the compass reads 268°. N b. Adjust the compass with the fore-and-aft magnets until the compass reads 270°. N c. Adjust the compass with the quadrantal spheres until the compass reads 274°. Y d. Adjust the compass with the fore-and-aft magnets until the compass reads 268°. 2354: A vessel is heading magnetic east and its magnetic compass indicates a heading of 093°. What action should be taken to remove this error during compass adjustment?
N a. If the blue ends of the magnets are to port you should raise the athwartships tray. N b. If the red ends of magnets are to port you should lower the athwartships tray. N c. If the red ends of the magnets are aft you should lower the fore-and-aft tray. Y d. If the blue ends of the magnets are forward you should raise the fore-and-aft tray. 2374: The largest of the navigational planets is __________.
N a. Mars N b. Venus Y c. Jupiter N d. Saturn 2474: A vessel is heading magnetic north and its magnetic compass indicates a heading of 356°. What action should be taken to remove this error during compass adjustment?
N a. 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. Y b. If the blue ends of the magnets are to starboard, and the athwartships tray is at the bottom, you should remove some magnets. N c. If the red ends of the magnets are to starboard, and the athwartships tray is at the bottom, you should reverse the magnets. N d. If the blue ends of the magnets are to starboard, you should raise the athwartships tray. 2474: A vessel is heading magnetic north and its magnetic compass indicates a heading of 356°. What action should be taken to remove this error during compass adjustment?
N a. 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. Y b. If the blue ends of the magnets are to starboard, and the athwartships tray is at the bottom, you should remove some magnets. N c. If the red ends of the magnets are to starboard, and the athwartships tray is at the bottom, you should reverse the magnets. N d. If the blue ends of the magnets are to starboard, you should raise the athwartships tray. 2525: Daylight savings time is a form of zone time that adopts the time __________.
N a. two zones to the west N b. two zones to the east N c. one zone to the west Y d. one zone to the east 2664: The Light List shows a lighted aid to navigation on the right bank. This means that the light can be seen on the port side of a vessel __________.
N a. crossing the river N b. descending the river Y c. ascending the river N d. proceeding towards sea 2854: The distance in miles between the circle of equal altitude for the observed altitude (Ho) and the circle of equal altitude for the computed altitude (Hc) is the __________.
N a. equation of time N b. zenith distance Y c. intercept N d. zenith angle 2928: You are in a buoyed channel at night and pass a lighted buoy with an irregular characteristic. You should report this to the __________.
Y a. Coast Guard N b. harbor master N c. Corps of Engineers N d. National Ocean Service 3010: A white buoy with a blue band is __________.
N a. an isolated danger mark N b. a hydrographic data collection buoy Y c. a mooring buoy N d. marking a restricted area 3040: Which instrument is used to predict the approach of a low pressure system?
N a. Anemometer N b. Fathometer Y c. Barometer N d. Thermometer 3042: How long would a steady wind need to blow in order to create a wind driven current?
N a. 2 hours N b. 6 hours Y c. 12 hours N d. 18 hours 3069: The database resulting from (1) the transformation of the electronic navigational chart (ENC) by ECDIS for appropriate use, (2) the updates to the ENC by appropriate means, and (3) the additional data added by the mariner, is called the __________.
N a. display base information N b. standard display information Y c. system electronic navigational chart N d. chart display information 3113: With respect to automatic identification systems (AIS), which information is required to be broadcast every 1 to 10 seconds?
N a. Call sign N b. Vessel's draft N c. Route plan Y d. None of the above