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.
23: If Loran-C signals become unsynchronized, the receiver operator is warned because __________.
Y a. signals begin to blink N b. signals begin to shift N c. stations discontinue transmission N d. stations transmit grass 108: A position that is obtained by using two or more intersecting lines of position taken at nearly the same time, is a(n) __________.
N a. dead-reckoning position N b. estimated position Y c. fix N d. running fix 118: What describes an accurate position that is NOT based on any prior position?
N a. Dead-reckoning position N b. Estimated position Y c. Fix N d. Running fix 158: Discounting slip, if your vessel is turning RPM for 10 knots and making good a speed of 10 knots, the current could be __________.
N a. with you at 10 knots N b. against you at 10 knots Y c. slack N d. with you at 2 knots 208: The moon is full and at perigee on 20 January 1983. What is the maximum current you could expect at 2350 (ZD +5) at Nantucket Shoals?
N a. 0.5 knot N b. 0.7 knot N c. 0.8 knot Y d. 1.0 knot 276: The region of high pressure extending around the Earth at about 35°N latitude is called the __________.
N a. prevailing westerlies Y b. horse latitudes N c. troposphere N d. doldrums 358: What will be the set of the rotary current at Nantucket Shoals at 1245 (ZD +5) 14 January 1983?
N a. 015° Y b. 125° N c. 162° N d. 225° 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 428: A buoy bears 178°T at 3000 yards (2700 meters). What is the course to make good to leave the buoy 100 yards (90 meters) to starboard?
N a. 174°T Y b. 176°T N c. 178°T N d. 180°T 430: The southeast trade winds actually blow toward the __________.
N a. southeast N b. south N c. east Y d. northwest 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 451: Which light characteristic may be used on a special purpose mark?
Y a. Fixed N b. Occulting N c. Equal interval N d. Quick flashing 472: Which conic projection chart features straight lines which closely approximate a great circle?
N a. Polyconic Y b. Lambert conformal N c. Orthographic N d. Stereographic 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° 486: Tropical cyclones do not form within 5° of the Equator because __________.
N a. there are no fronts in that area N b. it is too hot N c. it is too humid Y d. of negligible Coriolis force 555: The letter D shown represents the __________. (D006NG )
N a. geoidal horizon N b. celestial horizon N c. visible horizon Y d. geometrical horizon 634: What will cause the ARPA to emit a visual alarm, audible alarm, or both?
N a. An acquired target entering into a guard zone N b. A tracked target lost for one radar scan Y c. A tracked target entering your preset CPA-TCPA limits N d. A target being initially detected within a guard zone 708: Which statement about Radio Navigational Warning Broadcasts is TRUE?
N a. Radio navigational warnings are valid for 10 days, unless cancelled earlier. N b. NAVAREA warnings cover coastal areas only, while HYDROLANTS or HYDROPACS cover entire ocean areas. Y c. Radio navigational warnings issued by NGA (NIMA) are published in the Daily Memorandum and the Notice to Mariners. N d. HYDROLANTS and HYDROPACS cover the same geographical areas as NAVAREA warnings, but are for the use of military vessels only. 776: You are navigating in pilotage waters using running fixes. The maximum time between fixes should be about __________.
N a. 4 hours N b. 1 hour Y c. 30 minutes N d. 5 minutes 778: The navigable semicircle of a hurricane in the Northern Hemisphere is that area of the storm measured __________.
N a. from true north clockwise to 180°T N b. from true north counterclockwise to 180°T N c. from the bow counterclockwise to 180° relative Y d. from the direction of the storm's movement counterclockwise 180° 882: Some lights used as aids to marine navigation have a red sector to indicate a danger area. The limits of a colored sector of a light are listed in the Light List in which of the following manners?
N a. Geographical positions outlining the area of the sector Y b. True bearings as observed from the ship toward the light N c. An outline of the area of the sector N d. True bearings as observed from the light toward the ship 898: At 1200 ZT, on 31 July, your position is LAT 24°33'N, LONG 173°05'W. You are preparing a weather report form, WS Form, B-80. How should you encode the first three groups after the call sign if you estimate the wind? (D041NG )
Y a. 01003, 99245, 71731 N b. 01243, 92433, 71731 N c. 31243, 99245, 71731 N d. 31003, 92433, 71730 926: When a low pressure area is approaching, the weather generally __________.
N a. improves Y b. worsens N c. remains the same N d. is unpredictable 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 966: Most high pressure areas in the United States are accompanied by __________.
N a. precipitation Y b. clear, cool weather N c. humid, sticky weather N d. cool fogs 969: The population of northern right whales, an endangered species, numbers approximately __________.
Y a. 300 N b. 5000 N c. 100,000 N d. 1,000,000 1033: Deviation which is maximum on intercardinal compass headings may be removed by the __________.
N a. Flinders bar N b. transverse magnets N c. fore-and-aft magnets Y d. soft iron spheres on the sides of the compass 1042: What is the approximate geographic range of Shinnecock Light, NY, if your height of eye is 24 feet (7.3 meters)? Refer to "Reprints from the LIGHT LISTS AND COAST PILOTS" .
N a. 8.7 nm N b. 9.9 nm N c. 14.4 nm Y d. 15.9 nm 1091: The cardinal mark topmark shown in illustration D024NG represents which quadrant? (D024NG )
N a. Northern N b. Eastern N c. Southern Y d. Western 1130: During daylight savings time the meridian used for determining the time is located farther __________.
N a. west in west longitude and east in east longitude N b. east in west longitude and west in east longitude N c. west Y d. east 1225: The term "Western Rivers," when it refers to regulations requiring towing vessels to carry navigational-safety equipment, charts or maps, and publications, includes the _____________ .
N a. Mississippi River and its tributaries N b. Port Allen - Morgan City Alternate Route N c. Red River and the Old River Y d. All of the above 1272: What are the colors of a mid-channel daymark?
N a. Black and red Y b. Red and white N c. Green and red N d. Green and white 1386: The FIRST indications a mariner will have of the approach of a warm front will be __________.
N a. large cumulonimbus clouds building up N b. low dark clouds with intermittent rain N c. fog caused by the warm air passing over the cooler water Y d. high clouds gradually followed by lower thicker clouds 1395: The lunar day is __________.
Y a. longer than a solar day N b. shorter than a solar day N c. the same length as the solar day N d. longer than a solar day during the summer months and shorter in winter months 1505: At 0000 you fix your position and change course to 090°T. At 0030 you again fix your position and it is 0.5 mile east of your DR. Which statement is TRUE?
Y a. The current is easterly. N b. The drift is 0.5 knot. N c. You should alter course to the right to regain the track line. N d. The current is perpendicular to your track line. 1626: Which instrument is used to measure the relative humidity of the air?
N a. A hydrometer Y b. A hygrometer N c. A spectrometer N d. A barograph 1635: An isotherm is __________.
N a. a line on a weather map connecting equal points of both temperature and pressure N b. an instrument that measures the climatological effects of temperature N c. a line connecting points of equal barometric pressure on a weather map Y d. a line connecting points of equal temperature on a weather map 1642: Which type of cloud formation should be of immediate concern to small craft operators?
N a. cirrus N b. altostratus N c. nimbostratus Y d. cumulonimbus 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 1811: To find a magnetic compass course from a true course you must apply __________.
N a. deviation Y b. deviation and variation N c. variation N d. magnetic anomalies (local disturbances) 1824: The illustration represents a fixed C of E lock and dam. What navigational light(s) is(are) exhibited at the position indicated by the letter C in the illustration? (DO36NG )
N a. One red light N b. Two green lights Y c. Three green lights N d. No light 1986: The Moon is farthest from the Earth at __________.
N a. the full Moon Y b. apogee N c. the lunar solstice N d. quadrature 2099: 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 )
N a. Continue on the present heading until the range is in line, then alter course to the left. Y b. Continue on course until the range is closed, then alter course to the right. N c. Immediately alter course to the right to bring the range in line. N d. Immediately alter course to 309°T. 2130: You are underway and pass by a lighthouse. Its light, which was white since you first sighted it, changes to red. This means __________.
N a. the light is characterized as alternately flashing N b. the lighthouse has lost power and has switched to emergency lighting N c. it is the identifying light characteristic of the lighthouse Y d. you have entered an area of shoal water or other hazard 2243: Which aid is NOT marked on a chart with a magenta circle?
N a. Radar station N b. Radar transponder beacon Y c. Aero light N d. Radio beacon 2255: The height of tide is the __________.
N a. depth of water at a specific time due to tidal effect N b. difference between the depth of the water at high tide and the depth of the water at low tide N c. difference between the depth of the water and the high water tidal level Y d. difference between the depth of the water and the area's tidal datum 2286: Which light signal indicates that you have permission to enter a lock on the Ohio River?
N a. Steady red N b. Flashing amber N c. Steady green Y d. Flashing green 2428: If your vessel were proceeding up river (ascending), the port side of the channel would be marked according to the U. S. Aids to Navigation System on the Western Rivers by __________.
Y a. green can buoys N b. red can buoys N c. green nun buoys N d. red nun buoys 2446: What is the equivalent of 47 min. 20 sec. in arc units?
N a. 8°27' Y b. 11°50' N c. 13°42' N d. 13°56' 2478: On 23 August 1981 you observe a back sight of the lower limb of the Sun. The sextant altitude (hs) is 116°42.8'. The height of eye is 56 feet and the index error is 2.0' on the arc. What is the observed altitude (Ho)?
Y a. 63°42.0' N b. 63°38.0' N c. 63°19.4' N d. 62°49.6' 2510: When correcting apparent altitude to observed altitude, you do NOT apply a correction for __________.
N a. the equivalent reading to the center of the body N b. the equivalent reading from the center of the Earth N c. the bending of the rays of light from the body Y d. inaccuracies in the reference level 2692: The dividing meridian between zone descriptions -2 and -3 is __________.
N a. 15°30'E N b. 30°00'E Y c. 37°30'E N d. 45°00'E 2712: A bold reef is a reef __________.
N a. with part of it extending above the water Y b. that can be detected by water turbulence N c. that drops off sharply N d. perpendicular to the current 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 2782: Your radar is set on a true motion display. Which of the following will appear to move across the PPI scope.
Y a. Own ship's marker N b. Echo from a ship at anchor N c. Echoes from land masses N d. All of the above 2831: A coastal chart could have a scale of __________.
N a. not more than 1:25,000 N b. 1:35,000 Y c. 1:100,000 N d. 1:500,000 2838: You take a bearing of 191° and 313° to two objects. Which bearing of a third object will give the best fix?
N a. 001° Y b. 069° N c. 209° N d. 356° 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 3068: Which of the following data layer categories is NOT displayed on ECDIS?
N a. Notice to Mariners information N b. ECDIS warnings and messages Y c. Ship hydrodynamic information N d. Hydrographic Office data 3119: Automatic identification systems (AIS) are required to __________.
N a. provide safety-related information automatically to shore stations, other vessels and aircraft N b. receive safety-related information automatically from similarly equipped vessels N c. exchange safety-related information with shore-based facilities Y d. All of the above