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.
123: If the radio signal ground wave extends out for less distance than the minimum skywave distance, there is an area in which no signal is received. This is called the __________.
Y a. skip zone N b. blackout zone N c. diffraction zone N d. shadow zone 204: Because of the reflecting properties of a sextant, if the sextant altitude reads 60° on the limb, the actual arc of the limb from 0° to the 60° reading is __________.
N a. 20° Y b. 30° N c. 40° N d. 60° 254: The range of tide is the __________.
Y a. difference between the heights of high and low tide N b. distance the tide moves out from the shore N c. duration of time between high and low tide N d. maximum depth of the water at high tide 255: On March 17, at 0500 zone time, you cross the 180th meridian steaming eastward to west longitude. What is your local time?
N a. You are in -12 time zone. N b. It is 1700, March 18. Y c. It is 0500, March 16. N d. It is 0500, March 18. 275: Which statement concerning illustration is correct? (Soundings and heights are in meters) (D010NG )
Y a. The sunken wreck southwest of Beito Island shows the hull or superstructure above the sounding datum. N b. There is a 12-meter deep hole inside the 5-meter curve just west of Beito Island. N c. The position of the lightship is indicated by the center of the star on the symbol's mast. N d. Maury Lightship swings about her anchor on a circle with a 21-meter diameter. 280: Under the U.S. Aids to Navigation System, a lighted buoy with a spherical topmark marks __________.
N a. the port side of the channel Y b. safe water N c. a hazard to navigation N d. the position of underwater cables 280: Under the U.S. Aids to Navigation System, a lighted buoy with a spherical topmark marks __________.
N a. the port side of the channel Y b. safe water N c. a hazard to navigation N d. the position of underwater cables 476: Tropical cyclones normally form within which of the following belts of latitude?
Y a. 5° to 15° N b. 15° to 30° N c. 30° to 45° N d. 45° to 60° 513: You are radar scanning for a buoy fitted with a racon. Which radar screen represents the presentation you should expect on the PPI? (D017NG )
N a. A Y b. B N c. C N d. D 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 549: On a working copy of a weather map, an occluded front is represented by which color line?
N a. Red N b. Blue N c. Alternating red and blue Y d. Purple 552: A Mercator chart is a __________.
Y a. cylindrical projection N b. simple conic projection N c. polyconic projection N d. rectangular projection 559: A great circle crosses the equator at 162°E. It will also cross the equator at what other longitude?
N a. 62°E N b. 126°W N c. 162°W Y d. 18°W 571: The Coast Guard Captain of the Port has excluded all traffic from a section of a port, while a regatta is taking place. The buoys marking this exclusion area will be __________.
N a. nun- or can-shaped to conform to the overall direction of navigation N b. yellow Y c. orange and white N d. marked with a spherical topmark 603: What is the approximate wave length of an X Band Radar operating on a frequency of approximately 9500 MHz?
Y a. 3 cm N b. 10 cm N c. 30 cm N d. 100 cm 697: The set of the current is the __________.
N a. speed of the current at a particular time N b. maximum speed of the current N c. direction from which the current flows Y d. direction in which the current flows 863: The compass heading of a vessel differs from the true heading by __________.
Y a. compass error N b. variation N c. magnetic dip N d. deviation 867: Which ocean current is "warm" based on the latitude in which it originates and on the effect it has on climate?
Y a. Kuroshio Current N b. Benguela Current N c. Peru Current N d. California Current 869: Tropical storms and hurricanes are most likely to form in the Southern hemisphere during __________.
Y a. January through March N b. April through May N c. June through August N d. September through November 927: The set of the equatorial countercurrent is generally to the __________.
N a. north Y b. east N c. southwest N d. northwest 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 1028: At what angle to the isobars do surface winds blow over the open sea?
N a. About 90° N b. About 50° N c. About 25° Y d. About 15° 1104: Which condition(s) is(are) necessary for the formation of dew?
N a. Clear skies N b. Calm air N c. Earth's surface cooler than the dew point of the air Y d. All of the above 1178: The range of tide is the __________.
N a. distance the tide moves out from the shore Y b. difference between the heights of high and low tide N c. duration of time between the high and low tide N d. maximum depth of the water at high tide 1230: Weather forecast messages are usually __________.
N a. given only to TV stations N b. transmitted only by commercial broadcast stations Y c. broadcast in plain language N d. broadcast immediately on VHF Channel 16 and 2182 kHz 1297: What will be the velocity of the tidal current at Bournedale, MA, at 1135 DST (ZD +4) on 3 May 1983?
N a. 1.1 knots N b. 2.3 knots Y c. 3.0 knots N d. 3.6 knots 1326: A cloud sequence of cirrus, cirrostratus, and altostratus clouds followed by rain usually signifies the approach of a(n) __________.
N a. occluded front N b. stationary front Y c. warm front N d. cold front 1331: When trying to sight a lighthouse you notice a glare from a town in the background. The range at which the light may be sighted due to this glare is __________.
Y a. considerably reduced N b. increased slightly due to extra lighting N c. unchanged N d. increased if the light is red or green due to contrast with the glare 1348: Vessel required to have an Automatic Radar Plotting Aid must have a device to indicate the __________.
Y a. speed of the vessel over the ground or through the water N b. distance to the next port N c. time of the next navigational satellite pass N d. None of the above 1359: The distance in longitude from the intersection of a great circle and the equator to the lower vertex is how many degrees of longitude?
N a. 45° Y b. 90° N c. 135° N d. 180° 1362: Which type of cloud is indicated by the number 7 in illustration D039NG? (D039NG )
N a. Cirrostratus N b. Altocumulus Y c. Cumulus N d. Cumulonimbus 1484: You should plot your dead reckoning position at __________.
N a. every fix or running fix N b. every course change N c. every speed change Y d. All of the above are correct. 1504: The time meridian used when computing the height of tide for Pensacola Bay, FL, is __________.
N a. 75°00'W N b. 82°30'W Y c. 90°00'W N d. 97°30'W 1523: Which is a characteristic of the weather preceding an approaching warm front?
N a. Gusty winds Y b. Steadily falling barometric pressure N c. Decreasing relative humidity N d. Clearing skies 1588: The letter D in illustration D006NG represents the __________.
Y a. geometrical horizon N b. geoidal horizon N c. celestial horizon N d. visible horizon 1590: Civil twilight starts at 1812 zone time on 26 August 1981, Your DR position at that time is LAT 21°06'S, LONG 14°56' W. Which statement concerning the planets available for evening sights is TRUE?
N a. Mars will be near the prime vertical in the eastern sky. Y b. Venus may be identified from Saturn and Jupiter because it is the brightest. N c. Sights of Venus, Jupiter, and Saturn will yield a good three line fix. N d. A sight of either Jupiter, Saturn, or Venus will give a latitude line. 1607: When your barometer reading changes from 30.25 to 30.05 in a 12-hour period it indicates __________.
N a. rapidly changing weather N b. improving weather N c. high winds within the next six hours Y d. little or no immediate change 1696: Two well-developed high pressure areas may be separated by a __________.
N a. hill of low pressure Y b. trough of low pressure N c. valley of low pressure N d. ridge of low pressure 1763: Weather patterns in the Gulf Coast area of the United States are __________.
Y a. those of a transition zone between tropical and a temperate area N b. those of a tropical region N c. extremely hot in summer N d. tropical over Florida and subtropical over the rest of the Gulf Coast area 1798: The climate of the northern Gulf coast __________.
N a. is humid and subtropical throughout the year N b. has an east coast marine type of climate Y c. is a warm marine type of climate N d. varies from warm to subtropical 1807: Which weather system produces strong cold winds called "Northers" during the winter months in the Gulf of Mexico?
N a. A polar maritime air mass Y b. A high pressure system N c. A cyclone N d. A low pressure system 1932: The zenith is the point on the celestial sphere that is __________.
N a. 90° away from the poles Y b. directly over the observer N c. on the eastern horizon N d. over Greenwich 1972: The point on the celestial sphere that is directly over the observer is the __________.
N a. node N b. pole Y c. zenith N d. nadir 2125: On charts of U.S. waters, a magenta marking is NOT used for marking a __________.
N a. radio beacon N b. lighted buoy Y c. 5-fathom curve N d. prohibited area 2170: The temperature at which the air is saturated with water vapor and below which condensation of water vapor will occur is referred to as the __________.
N a. precipitation point N b. vapor point Y c. dew point N d. absolute humidity 2224: By convention, the north seeking ends of a compass' magnets are colored __________.
N a. black N b. blue Y c. red N d. white 2270: The lubber's line of a magnetic compass __________.
N a. always shows true north direction Y b. indicates the vessel's heading N c. is always parallel to the vessel's transom N d. is located on the compass card 2356: As observed from the Earth, the angle between lines from the Earth to the Sun and the Earth to an inferior planet is known as __________.
Y a. elongation N b. conjunction N c. opposition N d. quadrature 2392: The point where the Sun is at maximum declination north or south is __________.
N a. aphelion N b. perihelion N c. an equinox Y d. a solstice 2416: An orange and white buoy indicating a vessel-exclusion area will be marked with what symbol?
N a. Open-faced diamond Y b. Diamond with a cross N c. Circle N d. Square 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 2504: Under the IALA-A Buoyage System, when entering from seaward a lateral system buoy to be left to starboard may display which topmark shown? (D046NG )
N a. A N b. B Y c. C N d. D 2509: All persons or vessels within the lock area, including the lock approach channels, come under the authority of the __________.
N a. dockmaster N b. dock captain Y c. lockmaster N d. lock foreman 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 2760: You are pushing a tow ahead, at high speed, near the right hand bank of a canal. The forces affecting your towboat and tow will tend to __________.
N a. push both the head of the tow and the stern of the towboat away from the right hand bank Y b. push the head of the tow away from, and pull the stern of the towboat into, the right hand bank N c. pull both the head of the tow and the stern of the towboat into the right hand bank N d. pull the head of the tow into, and push the stern of the towboat away from, the right hand bank 2772: The direction in which a vessel should be steered between two points is the __________.
Y a. course N b. heading N c. bearing N d. course over the ground 2772: The direction in which a vessel should be steered between two points is the __________.
Y a. course N b. heading N c. bearing N d. course over the ground 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 3078: Which data must ECDIS be able to record at one-minute intervals?
N a. Position N b. Electronic navigational chart source N c. Course made good history Y d. All of the above 3089: As a licensed Merchant Marine Officer you are expected to __________.
N a. obtain a weather forecast before setting out from port N b. listen to weather forecasts on the radio while enroute N c. understand all broadcast weather warning information Y d. All of the above