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.
81: A buoy with a composite group-flashing light indicates a(n) __________.
Y a. bifurcation N b. fish net area N c. anchorage area N d. dredging area 84: When using an echo sounder in deep water, it is NOT unusual to __________.
Y a. receive a strong return at about 200 fathoms (366 meters) during the day, and one nearer the surface at night N b. receive a first return near the surface during the day, and a strong return at about 200 fathoms (366 meters) at night N c. receive false echoes at a constant depth day and night N d. have to recalibrate every couple of days due to inaccurate readings 88: Which position includes the effects of wind and current?
N a. Dead reckoning position N b. Leeway position Y c. Estimated position N d. Set position 132: The value of sixty nautical miles per degree of geodetic latitude is most correct at __________.
N a. the equator Y b. latitude 45° N c. the poles N d. all latitudes 169: You want to transit Hell Gate on 23 July 1983. What is the period of time around the AM (ZD +4) slack before ebb when the current will be less than 0.5 knot?
Y a. 0939 to 0957 N b. 0943 to 0953 N c. 0844 to 0852 N d. 0348 to 0356 194: The horizon glass of a sextant is __________.
Y a. silvered on its half nearer the frame N b. mounted on the index arm N c. between the horizon and the shade glasses N d. All of the above 217: In some parts of the world there is often a slight fall in tide during the middle of the high water period. The effect is to create a longer period of stand at higher water. This special feature is called a(n) __________.
N a. apogean tide Y b. double high water N c. perigean tide N d. bore 253: Loran-C is which type of system?
N a. Reflected electron N b. Electrical radiation N c. Quarterpoint electrical navigation Y d. Hyperbolic radio navigation 285: The apparent wind is zero when the true wind is __________.
N a. zero N b. from ahead and equal to the ship's speed Y c. from astern and equal to the ship's speed N d. from astern and is twice the ship's speed 360: The Illustration shows the symbols used on radio facsimile weather charts. The symbol indicated at letter "M" represents __________. (D042NG )
N a. rain Y b. snow N c. hail N d. ice 391: When outbound from a U.S. port, a buoy displaying a flashing red light indicates __________.
N a. a junction with the preferred channel to the left N b. a sharp turn in the channel to the right Y c. the port side of the channel N d. a wreck to be left on the vessel's starboard side 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 429: A great circle crosses the equator at 127°W. It will also cross the equator at what other longitude?
N a. 127°E Y b. 53°E N c. 27°E N d. 27°W 460: When using horizontal sextant angles of three objects to fix your position, an indeterminate position will result in which situation?
N a. The objects lie in a straight line. N b. The vessel is inside of a triangle formed by the objects. N c. The vessel is outside of a triangle formed by the objects. Y d. A circle will pass through your position and the three objects. 496: Severe tropical cyclones (hurricanes, typhoons) occur in all warm-water oceans except the __________.
N a. Indian Ocean N b. North Pacific Ocean N c. South Pacific Ocean Y d. South Atlantic Ocean 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 657: Current refers to the __________.
N a. vertical movement of the water Y b. horizontal movement of the water N c. density changes in the water N d. None of the above 674: When using an ARPA, what should you consider in order to evaluate the information displayed?
N a. The target vessel's generated course and speed are based solely on radar inputs. Y b. Navigational constraints may require a target vessel to change course. N c. The trial maneuver feature will automatically determine a course that will clear all targets. N d. You cannot determine if a small target has been lost due to sea return. 683: A radar contact will remain stationary on a relative motion radar display only when it is __________.
N a. on the same course as your vessel N b. at the same speed as your vessel Y c. on the same course and speed as your vessel N d. on a reciprocal course at the same speed as your vessel 771: Under the IALA Buoyage Systems, a spherical buoy will mark the __________.
Y a. safe water N b. port side of the channel N c. a hazard to navigation N d. the position of an underwater cable 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 884: Which cloud type is normally associated with thunderstorms?
N a. Cirrus N b. Stratus N c. Cumulus Y d. Cumulonimbus 996: Warm air masses will generally have __________.
N a. turbulence within the mass Y b. stratiform clouds N c. heavy precipitation N d. good visibility 1031: While steaming north of the Irish coast, you sight a buoy which shows the light rhythm shown in illustration D028NG. How would you pass this buoy? (D028NG )
N a. North of the buoy Y b. East of the buoy N c. South of the buoy N d. West of the buoy 1043: You are about to go to sea and adjust the magnetic compass. To expedite the adjustment at sea, in what order should the following dockside adjustments be made?
N a. Flinders bar first, then the heeling magnet and spheres N b. Heeling magnet first, then the Flinders bar and spheres Y c. Flinders bar first, then the spheres and heeling magnet N d. Spheres first, then the Flinders bar and heeling magnet 1055: The radius of a circle of equal altitude for a body equals the body's __________.
N a. declination N b. polar distance N c. altitude Y d. zenith distance 1126: When a warm air mass is adjacent to a cold air mass, the separation line between the two is called a(n) __________.
Y a. front N b. isobar N c. isotherm N d. equipotential line 1229: The initial great circle course angle between LAT 23°00'S, LONG 42°00'W and LAT 34°00'S, LONG 18°00'E is 063.8°. What is the true course?
N a. 063.8°T Y b. 116.2°T N c. 243.8°T N d. 296.2°T 1247: What is the predicted velocity of the tidal current 2 miles west of Southwest Ledge for 2330 DST (ZD +4) on 7 September 1983?
Y a. 1.3 knots N b. 1.6 knots N c. 1.9 knots N d. 2.2 knots 1271: Which word indicates color variation in the characteristics of a light?
N a. Opposing N b. Changing N c. Reversing Y d. Alternating 1309: When recording the wind direction in the weather log, you would report the __________.
N a. direction the wind is blowing toward Y b. direction the wind is blowing from N c. duration of the maximum gust of wind N d. wind chill factor 1349: The symbols shown are used on radio facsimile weather charts. Which of these symbols indicates a severe squall line? (D042NG )
N a. F N b. I Y c. G N d. H 1422: Cumulus clouds are indicated by what number in illustration D039NG? (D039NG )
N a. 3 N b. 5 N c. 6 Y d. 7 1430: The Light List indicates that a light has a nominal range of 14 miles and is 42 feet high (12.8 meters). If the visibility is 6 miles and your height of eye is 20 feet (6.1 meters), at what approximate distance will you sight the light?
N a. 20.1 miles Y b. 10.0 miles N c. 7.6 miles N d. 6.0 miles 1449: The presence of stratus clouds and a dying wind will usually result in __________.
N a. heavy rain N b. heavy snow Y c. thick fog N d. clearing skies 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 1492: You are planning a voyage from San Francisco to Japan. Which publication contains information on the ocean routes?
N a. Coast Pilot Y b. Sailing Directions (Planning Guide) N c. Sailing Directions (Enroute) N d. World Port Index 1563: Neap tides occur only __________.
N a. at a new or full Moon N b. when the Sun, Moon, and Earth are in line N c. at approximately 28-day intervals Y d. when the Moon is at quadrature 1578: The LMT of sunrise on the standard meridian is 0552. Your longitude is 99°15'E. What is your ZT of sunrise?
N a. 0512 N b. 0529 N c. 0552 Y d. 0615 1703: In the Northern Hemisphere, when the wind at your location is northerly, the low pressure center causing the wind is located to your __________.
N a. NNW N b. WSW Y c. ESE N d. SSW 1941: IN REGION A of the IALA Buoyage System, when entering from seaward, the starboard side of a channel would be marked by a __________.
N a. red can buoy N b. red conical buoy N c. green can buoy Y d. green conical buoy 2000: A vessel heading SE is on a course of __________.
N a. 112.5° Y b. 135.0° N c. 157.5° N d. 180.0° 2161: Yesterday your chronometer read 03h 01m 56s at the 1500 GMT time tick. Today your chronometer read 03h 01m 58s at the 1500 GMT time tick. What is the chronometer error?
N a. 03h 01m 58s fast Y b. 01m 58s fast N c. +2s N d. -2s 2168: By convention, the north pole of a magnet is painted __________.
Y a. red N b. blue N c. white N d. black 2232: A vessel is heading magnetic north and its magnetic compass indicates a heading of 003°. Which action should be taken to remove this error during compass adjustment?
N a. If the red ends are to starboard you should raise the athwartships tray. Y b. If the red ends are to starboard, and the athwartships tray is at the bottom, you should remove some magnets. N c. If the red ends are to port, and the athwartships tray is at the top, you should reverse the magnets. N d. If the red ends are to port, and the athwartships tray is at the top, you should lower the tray. 2238: A vessel is heading magnetic northwest and its magnetic compass indicates a heading of 312°. What action should be taken to remove this error during compass adjustment?
N a. If the quadrantal spheres are all of the way out replace them with larger spheres. N b. If the quadrantal spheres are all of the way in replace them with larger spheres. Y c. If the quadrantal spheres are all of the way in, move the spheres out. N d. If the quadrantal spheres are all of the way out, move the spheres in. 2410: A facility used for the discharge of a cargo of a particular hazard, such as chlorine, butane or ethane, must have what to warn water traffic of an immediate danger during fire or cargo release?
N a. An emergency boat and crew Y b. A siren or rotating flashing light N c. Flashing red lights located one-half mile upstream and downstream of the facility N d. Buoys with flashing lights controlled from shore, located one-half mile upstream and downstream of the facility 2470: You are on course 344°T and take a relative bearing of a lighthouse of 090°. What is the true bearing to the lighthouse?
N a. 016° Y b. 074° N c. 254° N d. 270° 2520: When correcting the sextant altitude to apparent altitude you are correcting for inaccuracies in the reference level and __________.
N a. the equivalent reading to the center of the body N b. the equivalent reading from the center of the Earth Y c. for inaccuracies in the instrument N d. the bending of the rays of light from the body 2648: The 3-cm radar as compared to a 10-cm radar with similar specifications will __________.
N a. give better range performance in rain, hail, etc. N b. display small targets in a mass of dense sea clutter at a greater range N c. have less sea return in choppy rough seas Y d. display a more maplike presentation for inshore navigation 2676: The place where a channel moves from along one bank of the river over to the other bank of the river is called a __________.
N a. draft N b. cutoff N c. draw Y d. crossing 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 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 2959: Vessels required to have an Automatic Radar Plotting Aid must have a device to indicate the __________.
N a. time of the next navigational satellite N b. distance to the next port Y c. speed of the vessel over the ground or through the water N d. None of the above 2994: You take a bearing of 313° and 076° of two objects. Which bearing of a third object will give the best fix?
Y a. 014° N b. 133° N c. 255° N d. 339° 3000: All aids to navigation listed in the Mississippi River System Light List are shown as miles from a reference point and on the __________.
N a. east or west bank Y b. left or right descending bank N c. port or starboard side of the vessel N d. left or right ascending bank 3019: Where would you find information about the time of high tide at a specific location on a particular day of the year?
Y a. Tide Tables N b. Tidal Current Tables N c. Coast Pilot N d. Nautical Almanac 3038: In low latitudes, the low(s) of the diurnal variation of pressure occur(s) at __________.
N a. noon N b. noon and midnight N c. 1000 and 2200 Y d. 0400 and 1600 3086: Which data must ECDIS be able to record at one-minute intervals?
Y a. Course made good history N b. Estimated time of arrival N c. Speed through the water N d. Shaft RPM 3091: Which of the following must an ECDIS system be able to perform?
N a. Conversion of "graphical coordinates" to "display coordinates" N b. Transformation of local datum to WGS-'84 datum N c. Calculation of true azimuth and distance between two geographical points Y d. All of the above