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.
96: A weather forecast states that the wind will commence veering. In the Northern Hemisphere this indicates that the wind will __________.
Y a. shift in a clockwise manner N b. shift in a counterclockwise manner N c. continue blowing from the same direction N d. increase in velocity 131: A vertically-striped buoy may be __________.
N a. striped black and green N b. striped black and yellow N c. lighted with a red light Y d. lighted with a white light 190: You are enroute to Jacksonville, FL, from San Juan, P.R. There is a fresh N'ly wind blowing. As you cross the axis of the Gulf Stream you would expect to encounter __________.
Y a. steeper waves, closer together N b. long swells N c. cirrus clouds N d. smoother seas and warmer water 230: If the LORAN-C ground wave does NOT extend out as far as the skywave skip distance, there will be a skip zone in which __________.
Y a. no LORAN-C signal is received N b. only ground waves are received N c. only skywaves are received N d. both ground waves and skywaves are received 284: The marine sextant is subject to seven different types of errors, four of which may be corrected by the navigator. An error NOT correctable by the navigator is __________.
N a. index error Y b. prismatic error N c. perpendicularity of the horizon glass N d. perpendicularity of the index mirror 300: Which of the symbols shown represents a warm front? (D018NG )
N a. A N b. B Y c. C N d. D 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 452: When navigating in high latitudes and using a chart based on a Lambert conformal projection, __________.
Y a. a straight line drawn on the chart approximates a great circle N b. the chart should not be used outside of the standard parallels N c. the course angle is measured at the mid-longitude of the track line N d. distance cannot be measured directly from the chart 477: Determine the height of the tide at 1430 EST (ZD +5) at New Bedford, MA, on 10 April 1983.
N a. 1.1 feet N b. 1.2 feet Y c. 1.4 feet N d. 1.7 feet 491: A special purpose buoy shall be __________.
N a. lighted with a white light N b. striped black and red N c. lighted with a red light Y d. yellow 511: A survey (special purpose mark) buoy __________.
N a. must be lighted N b. may have a flashing red light N c. may have a fixed white light Y d. None of the above 541: A yellow buoy may mark a(n) __________.
N a. wreck N b. shoal area Y c. anchorage area N d. middle ground 615: The spinning motion of a planet around its axis is called __________.
N a. revolution Y b. rotation N c. orbit N d. space motion 622: The scale of a Mercator projection is 4 inches equals 1°LONG. What is the expansion in inches between the 60th and 61st parallels?
Y a. 8.11 inches N b. 7.70 inches N c. 7.48 inches N d. 6.98 inches 663: You are underway at 10 knots. At 1800 you note a radar contact dead ahead at a range of 10 miles. At 1812 the contact is dead ahead at a range of 8 miles. The estimated speed of the contact is __________.
Y a. dead in the water N b. 5 knots N c. 10 knots N d. 15 knots 835: When taking stars, those bodies to the east and west will __________.
Y a. change altitude rapidly N b. change altitude slowly N c. remain in an almost fixed position N d. appear to be moving in the plane of the horizon 950: Where is the dangerous semicircle located on a hurricane in the Southern Hemisphere?
Y a. To the left of the storm's track N b. To the right of the storm's track N c. In the high pressure area N d. On the south side 1005: The refraction correction table given in the Nautical Almanac is based on a standard or average atmospheric density with a temperature of 50°F (10°C) and atmospheric pressure of __________.
N a. 29.72 inches (1006 millibars) Y b. 29.83 inches (1010 millibars) N c. 29.89 inches (1012 millibars) N d. 29.93 inches (1014 millibars) 1032: What is the approximate geographic range of Point Judith Light, Rhode Island, if your height of eye is 62 feet (18.9 meters)? Refer to "Reprints from the LIGHT LISTS AND COAST PILOTS" .
N a. 9.6 nm N b. 16.5 nm Y c. 18.6 nm N d. 20.7 nm 1044: The dry-bulb temperature is 78°F and the wet-bulb temperature is 62°F. What is the relative humidity?
N a. 16% N b. 24% Y c. 39% N d. 79% 1046: The probability of a sudden wind may be foretold by __________.
N a. a partly cloudy sky N b. an overcast sky Y c. a fast approaching line of dark clouds N d. the formation of cumulus clouds in the sky 1078: The description "Racon" beside an illustration on a chart would mean a __________.
N a. radar conspicuous beacon Y b. radar transponder beacon N c. radar calibration beacon N d. circular radio beacon 1082: Northern right whales can be identified by __________.
N a. whitish patches of skin on top of the head N b. "V" shaped blow easily visible from ahead or behind N c. no dorsal fin on the back Y d. All of the above 1114: Mechanical lifting of air by the upslope slant of the terrain is called __________.
N a. vertical lifting N b. convective lifting N c. advective lifting Y d. topographic lifting 1273: Deviation changes with a change in __________.
N a. latitude Y b. heading N c. longitude N d. sea conditions 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 1414: You are planning a voyage from New York to Norway via the English Channel. Which publication contains information on the dangers to navigation in the English Channel?
N a. Channel Pilot's Guide N b. World Port Index N c. Coast Pilot Y d. Sailing Directions (Enroute) 1467: Determine the time after 0730 EST (ZD +5) when the velocity of the current will be 2.1 knots on 26 March 1983, at Fort Pulaski, GA.
N a. 0802 N b. 0812 N c. 0821 Y d. 0840 1482: Which statement concerning current is TRUE?
N a. Current can be determined by measuring the direction and distance between simultaneous EP and DR positions. Y b. The drift of the current should be averaged out on a one hour basis. N c. After the current is determined, it should not be used for further plotting because it is an unknown variable. N d. The distance between a simultaneous DR position and fix is equal to the drift of the current. 1536: What will NOT induce errors into a Doppler sonar log?
Y a. Increased draft N b. Pitch N c. Roll N d. Change in trim 1543: The distance between the surface of the water and the tidal datum is the __________.
Y a. height of tide N b. charted depth N c. actual water depth N d. range of tide 1602: Most modern Loran-C receivers automatically detect secondary station blink which __________.
N a. indicates the station is transmitting normally N b. automatically shuts down the receiver Y c. triggers alarm indicators to warn the operator N d. causes the receiver to shift automatically to another Loran chain 1611: What indicates a dual purpose buoy?
N a. Red buoy with a horizontal yellow band N b. Red and white vertically-striped buoy with a vertical yellow stripe N c. Red and white vertically-striped buoy with a red spherical topmark Y d. Green buoy with a yellow square 1629: Air temperature varies with __________.
N a. the altitude above sea level N b. the season of the year N c. the latitude or distance from the equator Y d. All of the above 1665: Air circulation is caused or affected by __________.
N a. the rotation of the earth on its axis N b. convection currents caused by differences in radiant heating between equatorial and polar regions N c. mountain ranges Y d. All of the above 1697: In the Northern Hemisphere, if the center of a high pressure area is due west of you, what wind direction would you expect?
N a. South to west N b. South to east Y c. North to west N d. North to east 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 1716: The hurricane season in the North Atlantic Ocean reaches its peak during the month of __________.
N a. June Y b. September N c. November N d. July 1737: You can determine if your vessel's position is in the dangerous or navigable semicircle of a hurricane by __________.
N a. observing whether the wind is veering or backing N b. plotting two or more recent storm positions from weather bulletins Y c. Both A and B N d. Neither A nor B 1887: The Light List indicates that a light has a nominal range of 10 miles and is 11 feet high. If the visibility is 15 miles and your height of eye is 20 feet, at what approximate distance will you sight the light?
N a. 12.0 miles N b. 11.0 miles N c. 10.0 miles Y d. 9.0 miles 1909: In the horizon system of coordinates what is equivalent to the equator on the Earth?
N a. Prime vertical circle N b. Principal vertical circle N c. Parallels of altitude Y d. Horizon 1926: The prime vertical is the great circle on the celestial sphere that passes through the __________.
N a. celestial poles and the zenith Y b. zenith, nadir and the east point of the horizon N c. celestial poles and the celestial body N d. zenith, nadir and celestial body 1940: The diameter of the Sun and Moon as seen from the Earth varies slightly but averages about __________.
N a. 1' N b. 52' Y c. 32' N d. 15.5' 2104: A white buoy marked with an orange rectangle indicates __________.
N a. mid-channel N b. a fish net area Y c. general information N d. an anchorage 2152: Permanent magnetism is found in __________.
Y a. hard iron N b. soft iron N c. vertical iron only N d. horizontal iron only 2289: The constellation that contains the pointer stars is __________.
N a. Orion Y b. Ursa Major N c. the Southern Cross N d. Pegasus 2329: In low latitudes, a last quarter moon will always rise at about __________.
N a. sunrise N b. 1200 LMT N c. sunset Y d. 2400 LMT 2390: You are in a channel in U.S. waters near an industrial plant with a load/discharge facility for barges. You hear a siren being sounded at the facility. What does this indicate?
Y a. There is danger at the facility due to a fire or cargo release. N b. A towboat with a hazardous cargo barge is being moved to or from the facility. N c. The facility is warning a barge to shut down transfer operations due to weather conditions (electrical storms, tornado, etc.). N d. A barge at the facility has commenced loading or discharging operations. 2450: You are on course 180°T and take a relative bearing of a lighthouse of 225°. What is the true bearing of the lighthouse?
Y a. 045° N b. 135° N c. 180° N d. 270° 2642: Local sidereal time is equal to the __________.
N a. GHA of Aries minus 180° N b. SHA of Aries Y c. LHA of Aries N d. right ascension of Aries plus 180° 2762: You take a bearing of 176° of a lighthouse. Which bearing of another object would give the best fix?
Y a. 079° N b. 151° N c. 176° N d. 292° 2776: For a well made and well maintained sextant, the maximum value of which correction is usually so small that it can be ignored?
N a. Personal correction Y b. Instrument correction N c. Phase N d. Dip correction 2801: Mean high water is used __________.
N a. as the reference for soundings on the Gulf coast of the U.S. Y b. to indicate the shoreline where there is a large tidal fluctuation N c. as the reference plane for bottom contour lines N d. as the sounding datum for rivers, lakes, etc. regulated by locks 2840: The lockmaster has given you permission to tie off on the lower guide wall to wait your turn to lock through. What should you be most concerned with?
N a. A downbound vessel N b. An upbound vessel Y c. Current reaction when the lock chamber is being emptied N d. Current reaction when the lock chamber is being filled 3030: Isogonic lines are lines on a chart indicating __________.
Y a. points of equal variation N b. points of zero variation N c. the magnetic latitude N d. magnetic dip 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 3039: As you enter a U.S. channel from seaward the numbers on the buoys __________.
N a. increase with the can buoys being even numbered Y b. increase with the can buoys being odd numbered N c. decrease with the can buoys being even numbered N d. increase in channels going to the north or west, and decrease in channels going to the south or east 3070: The database information that should be shown when a chart is first displayed on ECDIS is the __________.
N a. display base information Y b. standard display information N c. system electronic nautical chart N d. chart display information 3106: What does an automatic identification system (AIS) transponder use to transmit and receive information broadcasts?
N a. 3000 Mhz and 9200 Mhz N b. 2182 Khz and 2187.5 Khz Y c. 156.525 Mhz, 161.975 Mhz and 162.025 Mhz N d. 1575.42 Mhz and 1227.6 Mhz 3124: Which of the following statements is TRUE regarding automatic identification systems (AIS)?
Y a. AIS is a short-range VHF-FM system that automatically broadcasts a vessel's position, course, speed and other safety related information to all those with similar equipment in the area. N b. AIS is a one-way centrally managed system that requires the local VTS to send commands to instruct each vessel to broadcast position, course, speed and other safety related information to all those with similar equipment in the area. N c. AIS is a global tracking system that relies upon INMARSAT C service to communicate vessel position, course, speed and other safety related information to all those with similar equipment in the area. N d. AIS is a short-range 3 cm X-band radar system that automatically sends a vessel's position, course, speed and other safety related information to all those with similar equipment within the area.