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.
43: A buoy with a composite group-flashing light indicates a(n) __________.
N a. anchorage area N b. fish net area Y c. bifurcation N d. dredging area 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 128: A position obtained by applying only your vessel's course and speed to a known position is a __________.
Y a. dead-reckoning position N b. fix N c. probable position N d. running fix 174: The position labeled D is a(n) __________. (D051NG )
N a. fix N b. running fix N c. estimated position Y d. dead reckoning position 176: Which wind pattern has the most influence over the movement of frontal weather systems over the North American continent?
N a. Subpolar easterlies N b. Northeast trades Y c. Prevailing westerlies N d. Dominant southwesterly flow 188: Off Barnegat, NJ, with the wind coming out of the east, the wind-driven current will be flowing approximately __________.
N a. 286° Y b. 254° N c. 106° N d. 016° 191: Safe water buoys may show ONLY __________.
N a. flashing red lights N b. flashing green lights Y c. white lights N d. yellow lights 195: The equation of time is 8m 00s. The mean Sun is ahead of the apparent Sun. If you are 2°W of the central meridian of your time zone, when will the apparent Sun cross your meridian?
Y a. 1216 N b. 1208 N c. 1200 N d. 1152 327: When daylight savings time is kept the times of tide and current calculations must be adjusted. One way of doing this is to __________.
N a. subtract one hour from the times listed under the reference stations Y b. add one hour to the times listed under the reference stations N c. apply no correction, as the times in the reference stations are adjusted for daylight savings time N d. add 15° to the standard meridian when calculating the time difference 412: If you were sailing in the North Pacific and were interested in the ice and iceberg limits, you could find this information in the __________.
Y a. Pilot Chart N b. Coast Pilot N c. Notice to Mariners N d. None of the above 490: You are underway on course 050°T and your maximum speed is 10 knots. The eye of a hurricane bears 100°T, 90 miles from your position. The hurricane is moving towards 285°T at 19 knots. Which course should you steer at 10 knots to have the maximum CPA?
N a. 221° Y b. 226° N c. 233° N d. 238° 543: A radar display which is oriented, so that north is always at the top of the screen, is called a(n) __________.
N a. relative display N b. composite display Y c. stabilized display N d. unstabilized display 552: A Mercator chart is a __________.
Y a. cylindrical projection N b. simple conic projection N c. polyconic projection N d. rectangular projection 649: You are on course 226°T. In order to check the latitude of your vessel, you should observe a celestial body on which bearing?
N a. 226° N b. 270° Y c. 000° N d. 026° 661: Under the IALA Buoyage Systems, safe water marks may show a __________.
N a. composite group-flashing, Fl(2 + 1), red light N b. composite group-flashing, Fl(2 + 1), green light N c. quick-flashing, Q(9)15s, white light Y d. white Morse (A) light 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. 721: Under the IALA Buoyage System, a red and white vertically-striped buoy would NOT indicate __________.
N a. a landfall Y b. the extreme end of an islet N c. a mid-channel N d. a center line 763: Time signals broadcast by WWV and WWVH are transmitted __________.
N a. every 15 minutes N b. every 30 minutes N c. every hour Y d. continuously throughout day 768: The wind velocity is higher in the dangerous semicircle of a tropical cyclone because of the __________.
Y a. wind circulation and forward motion of the storm N b. extension of the low pressure ridge N c. recurvature effect N d. direction of circulation and pressure gradient 877: Cold water flowing southward through the western part of the Bering Strait between Alaska and Siberia is joined by water circulating counterclockwise in the Bering Sea to form the __________.
N a. Alaska Current N b. Subarctic Current N c. Kuroshio Current Y d. Oyashio Current 1016: A source of an air mass labeled mTw is __________.
N a. the equator Y b. the Gulf of Mexico N c. Alaska N d. Canada 1023: Which compensates for induced magnetism in the horizontal soft iron of a vessel?
Y a. Iron spheres mounted on the binnacle N b. A single vertical magnet under the compass N c. The Flinders bar N d. Magnets in trays inside the binnacle 1050: The passing of a low pressure system can be determined by periodically checking the __________.
N a. thermometer N b. hygrometer Y c. barometer N d. anemometer 1076: Which is TRUE concerning the speed of fronts?
Y a. Cold fronts move faster than warm fronts. N b. Cold fronts move slower than warm fronts. N c. Cold fronts and warm fronts move with equal speed. N d. Cold fronts move slower at the northern end and faster at the southern end. 1108: Preferred channel buoys indicate the preferred channel to transit by __________.
N a. odd or even numbers Y b. the color of their top band N c. the location of the buoy in the channel junction N d. the buoy's light rhythms 1131: On navigational aids, what does the light characteristic "Fl(2+1)" mean?
N a. A flashing light combined with a fixed light of greater brightness Y b. Light flashes combined in groups, with a different number of flashes in each group N c. A light showing groups of two or more flashes at regular intervals N d. A fixed light varied at regular intervals by groups of two or more flashes of greater brightness 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 1190: Which type of cloud is indicated by the number 2? (D039NG )
N a. Cumulus Y b. Cirrostratus N c. Stratocumulus N d. Altostratus 1415: Planetary aberration is due, in part, to __________.
N a. refraction of light as it enters the Earth's atmosphere N b. rotation of the Earth on it's axis Y c. the body's orbital motion during the time required for its light to reach Earth N d. a false horizon 1426: Fog is most commonly associated with a(n) __________.
Y a. warm front at night N b. low pressure area N c. anticyclone N d. cold front in the spring 1501: What is the distance from the bottom of a wave trough to the top of a wave crest?
N a. Wave length Y b. Wave height N c. Wave breadth N d. Wave depth 1501: What is the distance from the bottom of a wave trough to the top of a wave crest?
N a. Wave length Y b. Wave height N c. Wave breadth N d. Wave depth 1522: The pressure-sensitive element of an aneroid barometer is called a __________.
N a. pressure bellows Y b. sylphon cell N c. column of mercury N d. constant pressure capsule 1528: Cirrostratus clouds are indicated by which number? (D039NG )
N a. 1 Y b. 2 N c. 8 N d. 9 1556: The vertical distance from the tidal datum to the level of the water is the __________.
N a. range of tide N b. charted depth Y c. height of tide N d. actual water depth 1585: The sidereal day begins when the __________.
Y a. first point of Aries is over the upper branch of the reference meridian N b. Sun is over the lower branch of the reference meridian N c. Sun is over the upper branch of the reference meridian N d. first point of Aries is over the lower branch of the reference meridian 1594: The Illustration shows the symbols used on radio facsimile weather charts. The symbol indicated at letter "P" represents __________. (D042NG )
N a. snow N b. hail Y c. freezing rain N d. sleet 1658: Fog forms when the air temperature is at or below __________.
N a. 32° F N b. the wet bulb temperature Y c. the dew point N d. the dry bulb temperature 1692: The force resulting from the earth's rotation that causes winds to deflect to the right in the Northern Hemisphere and to the left in the Southern Hemisphere is called __________.
N a. pressure gradient Y b. Coriolis effect N c. aurora borealis N d. ballistic deflection 1745: When your vessel is on the storm track but behind the storm's center the __________.
N a. wind direction remains steady N b. wind speed decreases N c. barometer rises Y d. All of the above 1815: Which weather system produces strong cold winds called "Northers" during the winter months in the Gulf of Mexico?
Y a. An anticyclone N b. A polar maritime air mass N c. A cyclone N d. A low pressure system 1871: A lighted buoy to be left to starboard, when entering a U.S. port from seaward, shall have a __________.
N a. green light N b. white light Y c. red light N d. light characteristic of Morse (A) 2092: Descending boats, while awaiting their turn to enter a lock, shall NOT block traffic from the lock. They shall be above the lock by at LEAST __________.
N a. 100 feet N b. 200 feet N c. 300 feet Y d. 400 feet 2317: The Light List indicates that a light has a nominal range of 13 miles and is 36 feet high (11.0 meters). If the visibility is 7.0 miles and your height of eye is 25 feet (7.6 meters), at what approximate distance will you sight the light?
Y a. 10.0 miles N b. 12.9 miles N c. 14.2 miles N d. 17.0 miles 2358: Altair is found in what constellation?
N a. Hercules N b. Cygnus Y c. Aquila N d. Capricorn 2366: The major problem with Moon sights is the __________.
N a. rapid changes in GHA and declination introduce errors into the calculations Y b. lack of a well defined limb during certain phases and positions in the sky N c. approximations used in the solution caused by the variable horizontal parallax N d. augmentation effect caused by the relatively short distance to the Moon 2374: The largest of the navigational planets is __________.
N a. Mars N b. Venus Y c. Jupiter N d. Saturn 2389: The autumnal equinox is the point where the Sun is at __________.
N a. maximum declination north N b. maximum declination south N c. 0° declination going to northerly declinations Y d. 0° declination going to southerly declinations 2429: The lock chamber is 600 feet X 110 feet. Your towboat is 150 feet X 35 feet. Which of these tows will require a double lockage?
N a. A set-over single N b. 4 standard barges abreast next to your boat's head and 3 jumbo abreast in the lead N c. 6 jumbo (3 abreast and 2 long) with a standard on each side of your boat Y d. 9 jumbo barges 2572: The dividing meridian between zone descriptions -4 and -5 is __________.
N a. 60°00'E Y b. 67°30'E N c. 75°00'E N d. 60°00'W 2721: You are plotting a running fix. How many fixed objects are needed to take your lines of position from?
Y a. One N b. Two N c. Three N d. None 2725: 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. estimated position N b. dead-reckoning position N c. running fix Y d. fix 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 2792: You take a bearing of 142° and 259° of two objects. Which bearing of a third object will give the best fix?
N a. 081° N b. 238° Y c. 201° N d. 234° 2842: The draw span of a floating drawbridge may be marked with __________.
N a. two white lights Y b. a yellow diamond N c. flashing blue lights N d. three red lights on each side of the draw 2859: The buoy indicated by the letter C in illustration D044NG is a __________.
N a. nun N b. can N c. spar Y d. pillar 2891: Twenty-three meters equals __________.
N a. 17.50 feet Y b. 75.46 feet N c. 96.00 feet N d. 104.99 feet 2930: How is a navigation light identified on an Army Corps of Engineers navigation map?
N a. Name and light characteristic Y b. Name and miles from a reference point N c. Light characteristic and miles A.H.P. N d. None of the above 2947: A position obtained by crossing lines of position taken at different times and advanced to a common time is a(n) __________.
N a. fix N b. dead-reckoning position Y c. running fix N d. estimated position 2949: On 13 November 1981 you observe a back sight of the upper limb of the Sun. The sextant altitude (hs) is 109°26.3'. The height of eye is 66 feet, and the index error is 2.0' on the arc. What is the observed altitude (HO)?
N a. 70°56.6' N b. 70°38.0' Y c. 70°27.2' N d. 70°23.2'