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.
74: When operated over a muddy bottom, a fathometer may indicate __________.
N a. a shallow depth reading N b. a zero depth reading N c. no depth reading Y d. two depth readings 178: You are steering a southerly course, and you note that the chart predicts an easterly current. Without considering wind, how may you allow for the set?
Y a. Head your vessel slightly to the right N b. Head your vessel slightly to the left N c. Decrease your speed N d. Increase your speed 200: When navigating using GPS, what is an indicator of the geometry of the satellites that your receiver is locked onto?
Y a. Horizontal Dilution of Precision N b. Selective Availability N c. Doppler Shifting N d. Precision Coding 256: The belt of light and variable winds between the westerly wind belt and the northeast trade winds is called the __________.
Y a. subtropical high pressure belt N b. intertropical convergence zone N c. doldrum belt N d. polar frontal zone 314: Which of these sextant errors is nonadjustable?
N a. Prismatic error N b. Graduation error N c. Centering error Y d. All of the above 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 564: A hygrometer is a device used for determining __________.
N a. the absolute temperature N b. atmospheric pressure N c. wind velocity Y d. relative humidity 569: A line of position formed by sighting two charted objects in line is called a(n) __________.
N a. relative bearing Y b. range line N c. track line N d. estimated position 678: On 25 December 1981 you observe the Sun's lower limb. The sextant altitude (hs) is 4°06.9'. The height of eye is 47 feet and the index error is 1.6' on the arc. The temperature is 19°F. and the barometer reads 1030.8 millibars. What is the observed altitude (Ho)?
N a. 3°57.4' Y b. 4°01.9' N c. 4°02.5' N d. 4°03.4' 681: You sight a spar buoy with the top mark shown in the illustration. You must __________. (D027NG )
N a. pass to the east of the buoy N b. pass to the south of the buoy N c. pass to the north of the buoy Y d. keep well clear of the buoy and pass on either side 691: Of the four light characteristics shown which one does NOT represent a safe water mark of the IALA Buoyage System? (D019NG )
Y a. A N b. B N c. C N d. D 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 765: Diurnal aberration is due to __________.
N a. motion of the Earth in its orbit Y b. rotation of the Earth on its axis N c. the body's orbital motion during the time required for its light to reach the Earth N d. a false horizon 766: Which position includes the effects of wind and current?
N a. Dead reckoning position N b. Leeway position N c. Set position Y d. Estimated position 799: 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. green can buoy N b. red can buoy Y c. green conical buoy N d. red conical buoy 807: The approximate mean position of the axis of the Gulf Stream east of Palm Beach, FL, is __________.
N a. 35 nautical miles N b. 25 nautical miles Y c. 15 nautical miles N d. 5 nautical miles 919: 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. Y b. The course and speed made good should be determined and used to advance the LOP. N c. The current should be ignored. N d. The set should be applied to the second bearing. 942: Light Lists for coastal waters are __________.
N a. published every year and require no corrections N b. published every second year and must be corrected N c. published every five years and require no correction Y d. accurate thru NM number on title page and must be corrected 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. 1,000,000 978: 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 1029: Which would be the subject of a NAVAREA warning?
N a. A drifting buoy sighted in mid-ocean N b. Extinguishment of Wolf Trap Light located inside Chesapeake Bay N c. All military exercises on the high seas involving four or more vessels Y d. Off-air times of radio beacons when scheduled for routine maintenance 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. 1132: On charts of U.S. waters, a magenta marking is NOT used for marking a __________.
N a. radio beacon Y b. 5-fathom curve N c. prohibited area N d. lighted buoy 1155: Which aid is NOT marked on a chart with a magenta circle?
N a. Radar station Y b. Aero light N c. Radio beacon N d. Radar transponder beacon 1155: Which aid is NOT marked on a chart with a magenta circle?
N a. Radar station Y b. Aero light N c. Radio beacon N d. Radar transponder beacon 1180: You are on course 238°T. To check the course of your vessel you should observe a celestial body on which bearing?
N a. 180° N b. 238° Y c. 328° N d. 090° 1190: Which type of cloud is indicated by the number 2? (D039NG )
N a. Cumulus Y b. Cirrostratus N c. Stratocumulus N d. Altostratus 1231: Some lights used as aids to marine navigation have a red sector to indicate a danger area. How are the limits of a colored sector of light listed in the Light List?
N a. Geographical positions outlining the area of the sector N b. True bearings as observed from the light toward a vessel Y c. True bearings as observed from a vessel toward the light N d. Bearings given in the Light List are always magnetic 1260: On 26 February 1983, at 1750 EST (ZD +5) what will be the predicted height of tide at New Haven (city dock), CT?
N a. -.3 foot (-0.1 meter) Y b. -.6 foot (-0.2 meter) N c. 1.3 feet (0.4 meter) N d. 1.6 feet (0.5 meter) 1366: Clouds appearing in the following order: cirrus, cirrostratus, altostratus, stratus, and nimbostratus usually indicate the approach of a(n) __________.
Y a. warm front N b. occluded front N c. medium front N d. cold front 1368: What area of the earth cannot be shown on a standard Mercator chart?
N a. Equator N b. Areas including both North and South latitudes Y c. North and South Poles N d. A narrow band along the central meridian. 1459: In a tropical cyclone, in the Northern Hemisphere, a vessel hove to with the wind shifting counterclockwise is __________.
N a. ahead of the storm center N b. in the dangerous semicircle Y c. in the navigable semicircle N d. directly in the approach path of the storm 1471: A mountain peak charted at 700 feet breaks the horizon, and your height of eye is 12 feet. What is your approximate distance off (choose closest answer)?
Y a. 34.7 nm N b. 40.3 nm N c. 55.3 nm N d. 61.6 nm 1486: Which condition would most likely result in fog?
Y a. Warm moist air blowing over cold water N b. Airborne dust particles N c. Warm moist air blowing over warm water N d. Dew point falling below the air temperature 1548: The Illustration shows the symbols used on radio facsimile weather charts. The symbol indicated at letter "K" represents a __________. (D042NG )
Y a. hurricane N b. thunderstorm N c. convergence zone N d. convergence line 1572: Generally speaking, in the Northern Hemisphere, when winds are blowing from between SE and SW the barometric reading __________.
N a. makes no change at all Y b. is somewhat lower than it would be for winds from a northern quadrant N c. is uncertain and may fluctuate by increasing and decreasing N d. is somewhat higher than it would be for winds from the northern quadrant 1576: You are entering an east coast port and see a buoy with a yellow triangle painted on it. This indicates __________.
Y a. you are in the vicinity of the ICW N b. the buoy is a special mark N c. the buoy is off station N d. the buoy designates a sharp turn in the channel 1577: Yesterday your chronometer read 11h 59m 59s at 1200 GMT time tick. Today the chronometer reads 12h 00m 01s at the 1200 GMT tick. What is the chronometer rate?
N a. -1s N b. +1s N c. -2s Y d. +2s 1628: As the temperature of the air reaches the dew point, __________.
N a. rain must develop Y b. fog may form N c. it begins to snow N d. water freezes 1724: What is the first visible indication of the presence of a tropical cyclone or hurricane?
N a. Stratocumulus clouds or strange birds N b. Rain and increasing winds Y c. An exceptionally long swell N d. Dark clouds and the "bar" of the storm 1885: Under the Uniform State Waterway Marking System a mooring buoy is painted __________.
Y a. white with a blue band N b. yellow N c. any color that does not conflict with the lateral system N d. white with a green top 1923: Little or no change in the barometric reading over a twelve hour period indicates __________.
N a. stormy weather is imminent Y b. that present weather conditions will continue N c. a defect in the barometer N d. increasing wind strength 2284: Bellatrix is found in what constellation?
N a. Canis Minor N b. Gemini N c. Taurus Y d. Orion 2412: The permanent magnetism of a vessel may change in polarity due to __________.
N a. being moored for a long time on one heading Y b. being struck by lighting N c. steaming from the north magnetic hemisphere to the south magnetic hemisphere N d. loading a homogenous magnetic cargo such as steel plate, iron bars, etc. 2432: A time diagram is a diagram of the celestial sphere as observed from above the __________.
Y a. south celestial pole N b. north celestial pole N c. observer's meridian N d. Greenwich meridian 2454: Illustration D037NG represents a moveable dam. If the wickets are down and there are open weirs due to high water, what light(s) will be shown at C if the lock walls and piers are not awash? (D037NG )
N a. One red light Y b. Two red lights N c. Three red lights N d. One amber light 2456: An orange and white buoy marking an area where operating restrictions are in effect will be marked with which symbol?
N a. Open-faced diamond N b. Diamond with a cross Y c. Circle N d. Rectangle 2569: The mean sun used to measure time moves __________.
N a. along the ecliptic at 15° per hour N b. along the celestial equator at 15° per day N c. along the ecliptic at 15° per day Y d. along the celestial equator at 15° per hour 2604: A sidereal day is approximately how much shorter than a solar day?
Y a. 4 minutes N b. 8 minutes N c. 12 minutes N d. 16 minutes 2709: Under the IALA-B Buoyage System, when entering from seaward a lateral system buoy to be left to port may display which of the topmarks shown? (D046NG )
N a. A N b. B N c. C Y d. D 2929: On 29 June 1981 you observe a back sight of the lower limb of the Moon. The sextant altitude (hs) is 114°16.9'. The height of eye is 36 feet and the index error is 2.0' on the arc. The horizontal parallax is 60.5'. What is the observed altitude (Ho)?
Y a. 66°31.6' N b. 66°31.0' N c. 66°28.8' N d. 66°26.0' 2975: The letter H in illustration D006NG represents the __________.
N a. geoidal horizon Y b. visible horizon N c. celestial horizon N d. refractive horizon 2975: The letter H in illustration D006NG represents the __________.
N a. geoidal horizon Y b. visible horizon N c. celestial horizon N d. refractive horizon 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 3025: You determine your vessel's position by taking a range and bearing to a buoy. Your position will be plotted as a(n) __________.
Y a. estimated position N b. dead-reckoning position N c. fix N d. running fix 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 3107: Automatic identification systems (AIS) are expected to broadcast all of the following information EXCEPT __________.
Y a. Port of origin N b. Name of vessel N c. Course and speed over ground N d. Draft of vessel 3112: With respect to automatic identification systems (AIS) which of the following information is broadcast every one to ten seconds?
N a. Vessel's draft N b. Air Draft Y c. Navigational status N d. Dimensions of vessel 3127: Which of the following statements is TRUE regarding automatic identification systems (AIS) ?
N a. AIS cannot be used to make passing arrangements because the system is not capable of this type of ship-to-ship communications. N b. AIS cannot be used to make passing arrangements because the ship-to-ship text messaging feature is for emergency use only. Y c. AIS can be used to make passing arrangements via ship-to-ship text messaging but a vessel operator is not relieved from the requirement to sound whistle signals or make arrangements via bridge-to-bridge radiotelephone. N d. AIS can be used to make passing arrangements via ship-to-ship text massaging thus relieving a vessel operator from making such arrangements via bridge-to-bridge radiotelephone or signaling intent to pass via whistle signals.