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.
48: When should a navigator rely on the position of floating aids to navigation?
N a. During calm weather only N b. During daylight only N c. Only when inside a harbor Y d. Only when fixed aids are not available 58: You should plot your dead reckoning position __________.
N a. at every course change N b. hourly N c. at every speed change Y d. All of the above are correct. 145: The standard time meridian for zone description -1 is __________.
N a. 0° N b. 7 1/2°W N c. 7 1/2°E Y d. 15°E 189: While steering a course of 150°T, you wish to observe the Sun for a speed check. What would the azimuth have to be?
N a. 060°T N b. 090°T Y c. 150°T N d. 240°T 206: The winds you would expect to encounter in the North Atlantic between latitudes 5° and 30° are known as the __________.
N a. doldrums N b. westerlies Y c. trades N d. easterlies 336: You are steaming eastward in the North Atlantic in an extratropical cyclonic storm and the wind is dead ahead. According to the law of Buys Ballot, the center of the low pressure lies __________.
N a. ahead of you N b. astern of you N c. to the north Y d. to the south 388: You are underway on course 120°T and your maximum speed is 12 knots. The eye of a hurricane bears 150°T, 120 miles from your position. The hurricane is moving towards 295°T at 20 knots. If you maneuver at 12 knots to avoid the hurricane, what could be the maximum CPA?
N a. 89 miles N b. 96 miles N c. 105 miles Y d. 117 miles 456: Which condition exists in the eye of a hurricane?
N a. Wind rapidly changing direction N b. A temperature much lower than that outside the eye N c. Towering cumulonimbus clouds Y d. An extremely low barometric pressure 517: On 5 March 1983, at 0630 EST (ZD +5), what will be the predicted height of tide at Ocracoke, Ocracoke Inlet, NC?
Y a. 0.1 foot N b. 1.2 feet N c. 1.9 feet N d. 2.3 feet 542: The only cylindrical chart projection widely used for navigation is the __________.
N a. Lambert conformal Y b. Mercator N c. azimuthal N d. gnomonic 552: A Mercator chart is a __________.
Y a. cylindrical projection N b. simple conic projection N c. polyconic projection N d. rectangular projection 563: Your radar has a beam width of 2°. The radar gyro bearing of the right tangent of an island is 316°. The gyro error is 1°E. Which true bearing should be plotted on the chart?
N a. 313° N b. 314° Y c. 316° N d. 317° 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 698: You are in LONG 165°E, zone time at 0400, 1 November 1981. What is the zone time and date in LONG 165°W?
Y a. 0600, 31 October N b. 1800, 31 October N c. 1800, 1 November N d. 0600, 1 November 829: You are plotting a running fix in an area where there is a determinable current. How should this current be treated in determining the position?
N a. The drift should be added to the ship's speed. N b. The set should be applied to the second bearing. N c. The current should be ignored. Y d. The course and speed made good should be determined and used to advance the LOP. 870: Vessels should maintain a sharp lookout, especially during December through March, when navigating the right whale's only known calving grounds which lie off the coasts of __________.
N a. Nova Scotia N b. Maine and Massachusetts Y c. Georgia and NE Florida N d. California and Mexico 905: The Sun's center is coincident with the principal vertical circle when __________.
Y a. in lower transit N b. the hour circle and prime vertical are coincident N c. the declination is zero degrees and the azimuth is exactly N 135°E N d. the declination is zero degrees and the azimuth is exactly N 135°W 910: The Light List shows that a navigational light has a nominal range of 12 miles and a height above water of 25 feet (7.6 meters). Your height of eye is 38 feet (11.6 meters) and the visibility is 5.5 miles. At what approximate range will you FIRST sight the light?
N a. 5.5 miles N b. 6.3 miles Y c. 8.0 miles N d. 12.0 miles 931: Under the IALA-B Buoyage System, when entering from seaward, a buoy that should be left to port will be __________.
N a. black N b. red Y c. green N d. yellow 960: The Light List shows that a navigational light has a nominal range of 15 miles and a height above water of 29 feet (8.8 meters). Your height of eye is 52 feet (15.8 meters) and visibility is 6.0 miles. At which approximate range will you first sight the light?
N a. 8.0 miles Y b. 11.0 miles N c. 14.5 miles N d. 16.0 miles 978: The wind velocity is higher in the dangerous semicircle of a tropical cyclone because of the __________.
N a. recurvature effect N b. extension of the low pressure ridge Y c. wind circulation and forward motion of the storm N d. direction of circulation and pressure gradient 992: Which publication contains information on Naval Control of Shipping (NCS) in time of emergency or war?
Y a. Pub. 117, Radio Navigational Aids N b. Appropriate volume of the Sailing Directions N c. Pub. 102, International Code of Signals N d. Light List 1009: You are preparing a weather report form, WS Form B-80. The dry bulb thermometer reads 34°F, and the wet bulb thermometer reads 31°F. Using the ships code card, how would you encode the air temperature groups in the report? (D041NG )
N a. 10340, 2127/ N b. 10111, 2104/ Y c. 10011, 2104/ N d. 10340, 2031/ 1022: What is the approximate geographic range of Fenwick Island Light, Delaware, if your height of eye is 37 feet (11.6 meters)? Refer to "Reprints from the LIGHT LISTS AND COAST PILOTS" .
N a. 24.8 nm Y b. 17.8 nm N c. 15.9 nm N d. 10.3 nm 1098: A chart position enclosed by a square is a(n) __________.
N a. fix Y b. estimated position N c. dead reckoning position N d. running fix 1182: Referring to the illustration, which wind speed is reported in position C? (D049NG )
N a. 3 knots N b. 10 knots N c. 20 knots Y d. 30 knots 1251: A List of Lights entry (L Fl) is a single flashing light which shows a long flash of not less than __________.
N a. 1.0 second duration N b. 1.5 seconds duration Y c. 2.0 seconds duration N d. 3.0 seconds duration 1319: The Sailing Directions (Planning Guide) contain information on all of the following EXCEPT __________.
Y a. coastal features N b. ocean basin environment N c. ocean routes N d. military operating areas 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 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 1408: An occluded front is caused by a(n) __________.
N a. low pressure area N b. high pressure area N c. area of calm air Y d. cold front overtaking a warm front 1410: A white buoy marked with an orange rectangle indicates __________.
N a. a fish net area Y b. general information N c. an anchorage N d. mid-channel 1427: Determine the duration of the first PM slack water on 3 March 1983, east of the Statue of Liberty, when the current is less than 0.1 knot?
N a. 10 minutes Y b. 13 minutes N c. 16 minutes N d. 19 minutes 1441: Your height of eye is 40 feet (12.2 meters). What is the approximate geographical distance at which Ambrose Light, NY, could be visible? Refer to "Reprints from the LIGHT LISTS AND COAST PILOTS".
N a. 18.3 nm N b. 19.5 nm Y c. 21.0 nm N d. 22.8 nm 1460: What is the major advantage of a rhumb line track?
Y a. The vessel can steam on a constant heading (disregarding wind, current, etc.). N b. The rhumb line is the shortest distance between the arrival and departure points. N c. It is easily plotted on a gnomonic chart for comparison with a great circle course. N d. It approximates a great circle on east-west courses in high latitudes. 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 1538: The winds of the "roaring forties" are strongest near __________.
N a. 40°N N b. 50°N N c. 40°S Y d. 50°S 1608: When using a buoy as an aid to navigation which of the following should be considered?
N a. If the light is flashing the buoy should be considered to be in the charted location. Y b. The buoy may not be in the charted position. N c. The buoy should be considered to be in the charted position if it has been freshly painted. N d. The buoy should be considered to always be in the charted position. 1617: The inner cloud bands of a hurricane, when viewed from a distance, form a mass of dense, black cumulonimbus clouds called the __________.
Y a. bar of the storm N b. eye of the storm N c. funnel N d. front 1618: The Light List indicates that a light has a nominal range of 14 miles and is 26 feet high. If the visibility is 4 miles and your height of eye is 20 feet, at what approximate distance will you sight the light?
Y a. 7.5 miles N b. 9.6 miles N c. 11.2 miles N d. 14.0 miles 1631: Which picture shows an occulting light? (D034NG )
N a. A Y b. B N c. C N d. D 1643: Cumulus clouds that have undergone vertical development and have become cumulonimbus in form, indicate __________.
N a. clearing weather N b. that a warm front has passed Y c. probable thunderstorm activity N d. an approaching hurricane or typhoon 1742: In the Northern hemisphere which semicircle of a hurricane is the navigable semicircle?
Y a. Left N b. Right N c. Front N d. Back 1818: In order to utilize the capacity of a lock to its maximum, pleasure craft are locked through with all of the following EXCEPT __________.
N a. coal barges Y b. oil barges N c. sand barges N d. cement barges 1936: The parallel of latitude at 66°33'N is the __________.
N a. Tropic of Cancer N b. Tropic of Capricorn Y c. Arctic Circle N d. ecliptic 1949: "Revolution" is the __________.
N a. wobbling of the Earth about its axis N b. motion of bodies in the solar system relative to the stars Y c. motion of a celestial body in its orbit N d. spinning of a celestial body about its axis 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 2082: You are holding position above Gallipolis Lock and Dam when you hear two long blasts of the horn from the lock. This indicates that you should __________.
Y a. enter the riverward lock N b. hold position until two more upbound tows have locked through N c. enter the landward lock N d. hold position until the lower gates are closed 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 2336: The period of revolution of the Moon is __________.
N a. 24 hours Y b. about 27.3 days N c. 365 days N d. about 19 years 2384: On U.S. charts, you can tell if a named feature such as a rock (i.e. Great Eastern Rock in Block Island Sound) is submerged by the __________.
N a. color of ink used to print the name Y b. style of type used to print the name N c. dashed circle around the feature N d. magenta circle around the feature 2458: In the U.S. Aids to Navigation System on the Western Rivers, the light characteristic of group flashing (2) is used for lights on __________.
N a. the right descending bank Y b. the left descending bank N c. preferred channel buoys N d. daymarks with no lateral significant 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' 2579: A phase correction may be applicable to correct the sextant altitude correction of __________.
N a. any star N b. the Sun N c. third magnitude stars only Y d. some planets 2584: You must construct a Mercator plotting sheet on a piece of paper measuring 30" by 36". The area includes latitude 30°45'S to 37°15'S and longitude 004°00'E to 005°00'W. Allow a one 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 limitation?
N a. 3.09 inches N b. 3.22 inches N c. 3.41 inches Y d. 3.58 inches 2744: The standard atmospheric pressure measured in inches of mercury is __________.
Y a. 29.92 N b. 500.0 N c. 760.0 N d. 1013.2 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 2922: The Light List indicates that a dayboard is a type TR-SY. You should __________.
N a. look for a dayboard of type TR-TY to form a range Y b. leave it to port when southbound on the Atlantic portions of the ICW N c. pass it close aboard on either side N d. expect a daymark with no lateral significance 3002: The diurnal variation of pressure is most noticeable __________.
N a. above the polar circles N b. in a low pressure area N c. during periods of low temperatures Y d. in the doldrums 3057: IN REGION A of the IALA Buoyage System, when entering from seaward, the starboard side of a channel would be marked by a __________.
Y a. green conical buoy N b. green can buoy N c. red can buoy N d. red conical buoy