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.
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 95: The difference in local time between an observer on 114°W and one on 119°W is __________.
N a. 1.25 minutes N b. 5 minutes Y c. 20 minutes N d. 75 minutes 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 187: Which statement is TRUE concerning apogean tides?
N a. They occur only at quadrature. N b. They occur when the Moon is nearest the Earth. N c. They cause diurnal tides to become mixed. Y d. They have a decreased range from normal. 204: Because of the reflecting properties of a sextant, if the sextant altitude reads 60° on the limb, the actual arc of the limb from 0° to the 60° reading is __________.
N a. 20° Y b. 30° N c. 40° N d. 60° 235: When the equation of time is taken from the Nautical Almanac for use in celestial navigation, it is used to determine __________.
N a. zone time N b. sunrise Y c. time of local apparent noon N d. local mean time 294: What is a nonadjustable error of the sextant?
Y a. Prismatic error N b. Index error N c. Side error N d. Error of collimation 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 368: A great circle crosses the equator at 134°E. It will also cross the equator at what other longitude?
Y a. 46°W N b. 124°W N c. 134°W N d. 34°E 396: Your vessel is on course 150°T, speed 17 knots. The apparent wind is from 40° off the starboard bow, speed 15 knots. What is the speed of the true wind?
N a. 9.0 knots N b. 10.2 knots Y c. 11.0 knots N d. 12.0 knots 431: When a buoy marks a channel bifurcation, the preferred channel is NOT indicated by __________.
N a. the shape of an unlighted buoy N b. the light color of a lighted buoy N c. the color of the topmost band Y d. whether the number is odd or even 501: Which of the buoys listed below could be used to mark an anchorage?
N a. White buoy numbered "3" N b. White buoy with a green top N c. White buoy with orange bands Y d. Yellow buoy lettered "N" 504: Barometer readings in weather reports are given in terms of pressure at __________.
Y a. sea level N b. Washington, D.C. N c. the weather station N d. the broadcasting station 572: You wish to measure the distance on a Mercator chart between a point in latitude 43°30'N and a point in latitude 40°30'N. To measure 30 miles at a time, you should set the points of the dividers at __________.
N a. 41°30' and 42°00' Y b. 41°45' and 42°15' N c. 42°00' and 42°30' N d. 42°15' and 42°45' 582: Distance along a track line is measured on a Mercator chart by using the __________.
Y a. latitude scale near the middle of the track line N b. longitude scale near the middle of the track line N c. latitude scale at the mid-latitude of the chart N d. latitude or longitude scale at the middle of the scale 637: Your draft is 24 feet. You wish to pass over an obstruction near Lovell Island, MA, on 6 May 1983. The charted depth is 22 feet. Allowing a safety margin of 3.0 feet, what is the earliest time after 0200 DST (ZD +4) that this passage can be made?
N a. 0215 N b. 0245 N c. 0310 Y d. 0347 641: Buoys which mark isolated dangers are painted with alternating _____________ .
Y a. red and black bands N b. green and black bands N c. red and white stripes N d. green and white bands 724: Which statement concerning GPS is TRUE?
N a. It cannot be used in all parts of the world. N b. There are 12 functioning GPS satellites at present. Y c. It may be suspended without warning. N d. Two position lines are used to give a 2D fix. 791: Under the IALA Buoyage Systems, the topmark of a red and white vertically-striped buoy shall be __________.
N a. X-shaped N b. two black spheres Y c. a single red sphere N d. a single red cone 806: Temperature and moisture characteristics are modified in a warm or cold air mass due to __________.
N a. pressure changes in the air mass Y b. movement of the air mass N c. the heterogeneous nature of the air mass N d. upper level atmospheric changes 845: During one synodic rotation, a body makes one complete turn relative to the __________.
N a. Earth Y b. Sun N c. stars N d. vernal equinox 885: The daily path of a celestial body that is parallel to the celestial equator is the __________.
N a. altitude circle N b. vertical circle Y c. diurnal circle N d. hour circle 998: The navigable semicircle of a tropical storm in the South Indian Ocean is located on which side of the storm's track?
N a. Rear N b. Front N c. Left Y d. Right 1020: The Light List shows that a navigational light has a nominal range of 6 miles and a height above water of 18 feet (5.5 meters). Your height of eye is 40 feet (12.2 meters) and the visibility is 27.0 miles. At which approximate range will you first sight the light?
N a. 5.6 miles N b. 6.4 miles Y c. 9.8 miles N d. 12.1 miles 1027: In the Northern Hemisphere the major ocean currents tend to flow __________.
Y a. clockwise around the North Atlantic and North Pacific Oceans N b. clockwise or counterclockwise depending on whether it is warm or cold current N c. counterclockwise except in the Gulf Stream N d. counterclockwise around the North Atlantic and North Pacific Oceans 1051: Under the IALA Buoyage Systems, a cardinal mark may NOT be used to __________.
N a. indicate that the deepest water in an area is on the named side of the mark N b. indicate the safe side on which to pass a danger N c. draw attention to a feature in the channel such as a bend, junction, bifurcation, or end of a shoal Y d. indicate the port and starboard sides of well-defined channels 1064: The dew point temperature is __________.
N a. always higher than the air temperature N b. always lower than the air temperature N c. equal to the difference between the wet and dry bulb temperatures Y d. the temperature at which the air is saturated with water vapor 1086: When crossing a front isobars tend to __________.
Y a. change from smooth curves within the air mass to sharp bends at the front N b. change from sharp bends within the air mass to smooth curves at the front N c. pass smoothly across the front with no change N d. become closer together at the front and pass through in straight lines 1188: The magnitude of three stars is indicated. Which star is the brightest?
N a. Antares + 1.2 N b. Altair + 0.9 Y c. Vega + 0.1 N d. Cannot be determined; magnitude indicates size not brightness 1256: A cold front moving in from the northwest can produce __________.
Y a. thunderstorms, hail, and then rapid clearing N b. increasing cloud cover lasting for several days N c. lengthy wet weather N d. low ceilings with thick cirrus clouds 1291: The period of a lighted aid to navigation refers to the __________.
N a. date of construction or establishment N b. length of time between flashes of the light N c. time required for the longest flash of each cycle Y d. time required for the light to complete each cycle 1340: The annual change in variation for an area can be found in __________.
N a. the handbook for Magnetic Compass Adjustment, Pub 226 Y b. the center of the compass rose on a chart of the area N c. the compass deviation table N d. Variation does not change. 1360: Which type of cloud is composed entirely of ice crystals and is found at very high altitudes?
N a. Cumulus Y b. Cirrus N c. Stratus N d. Nimbostratus 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 1527: Your vessel is on course 270°T, speed 10 knots. The apparent wind is from 10° off the port bow, speed 30 knots. From which direction is the true wind?
N a. 345°T Y b. 255°T N c. 165°T N d. 075°T 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 1569: Three or four feet of the total height of a storm surge in a hurricane can be attributed to __________.
N a. an increase in temperature N b. an increase in the wave period N c. the wind velocity Y d. the decrease in atmospheric pressure 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 1632: Lighted white and orange buoys must show which color light?
N a. Orange N b. Red Y c. White N d. Alternating yellow and white 1648: A sign of thunderstorm development is a cumulus cloud __________.
N a. darkening, growing in size and forming an anvil top N b. that shows extensive vertical development N c. creating cold downdrafts that are felt on the ground Y d. All of the above 1772: The GP of a body for a high altitude sight is determined from the declination and the __________.
Y a. Greenwich hour angle N b. azimuth N c. zenith distance N d. right ascension 1800: In order to insure that a RACON signal is displayed on the radar, you should __________.
N a. increase the brilliance of the PPI scope Y b. turn off the interference controls on the radar N c. use the maximum available range setting N d. increase the radar signal output 1974: Ocean currents are well defined and __________.
N a. create large waves in the direction of the current N b. change direction 360° during a 24 hour period Y c. remain fairly constant in direction and velocity throughout the year N d. are characterized by a light green color 1978: A celestial body's complete orbit around another body is __________.
N a. a rotation Y b. a revolution N c. space motion N d. nutation 2056: This illustration represents a fixed C of E lock and dam. What navigational light(s) is(are) exhibited at the position indicated by the letter C? (D038NG )
N a. One red light Y b. Two green lights N c. Three green lights N d. No lights 2102: The subregions of the United States Gulf and East Coasts are numbered 11, 12 and 13 within the chart numbering system. Which chart number indicates a chart for either the Gulf or East Coast?
N a. 21214 Y b. 11314 N c. 14313 N d. 14114 2196: 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?
Y a. If the quadrantal spheres are all the way out, replace them with smaller spheres. N b. If the quadrantal spheres are all the way in, replace them with larger spheres. N c. If the quadrantal spheres are all of the way out, move the spheres in. N d. If the quadrantal spheres are all the way out, replace them with larger spheres. 2237: A lighted buoy to be left to starboard, when entering a U.S. port from seaward, shall have a __________.
N a. light characteristic of Morse (A) N b. white light N c. green light Y d. red light 2259: A vessel is heading magnetic northwest and its magnetic compass indicates a heading of 317°. What action should be taken to remove this error during compass adjustment?
N a. If the quadrantal spheres are out as far as possible replace them with smaller spheres. N b. If the quadrantal spheres are in as far as possible remove one of the spheres. N c. If the quadrantal spheres are in as far as possible replace them with smaller spheres. Y d. If the quadrantal spheres are out as far as possible, move the quadrantal spheres in. 2374: The largest of the navigational planets is __________.
N a. Mars N b. Venus Y c. Jupiter N d. Saturn 2512: In the time diagram shown __________. (D005NG )
Y a. you are in east longitude N b. your time is about 1000 N c. your date is a day earlier than the date at Greenwich N d. you must be in the Northern Hemisphere for it to be accurate 2583: You are in the Northern Hemisphere and a tropical wave is located 200 miles due west of your position. Where will the wave be located 24 hours later?
N a. In the same place N b. Closer and to the west N c. Closer and to the east Y d. Farther away to the west 2616: What is the equivalent of 4 min. 04 sec. in arc units?
N a. 60°16' N b. 8°08' N c. 2°08' Y d. 1°01' 2679: Under the U.S. Aids to Navigation System on the Western Rivers, a daymark on the right descending bank will __________.
Y a. be green N b. have an odd number N c. indicate the gage reading N d. have yellow retroreflective markings 2820: A towboat is pushing barges ahead at a dangerously fast speed when __________.
N a. the towboat vibrates when backing down N b. the roostertail exceeds the height of the main deck N c. a strain is placed on the face wires Y d. water comes over the foredeck of the lead barges 2826: You take a bearing of 043° and 169° of two objects. What bearing of a third object will give the best fix?
N a. 356° Y b. 102° N c. 144° N d. 201° 3031: Which symbol would indicate a large automated navigational buoy, such as those that have replaced some lightships? (D015NG )
N a. A Y b. B N c. C N d. D 3067: Which of the following are data layer categories to be displayed on ECDIS?
N a. ECDIS warnings and messages N b. Hydrographic Office data N c. Notice to Mariners information Y d. All of the above 3114: With respect to automatic identification systems (AIS), which information is expected to be broadcast every 1 to 10 seconds?
N a. Rate of turn N b. Latitude and longitude N c. Navigational status Y d. All of the above 3118: With respect to automatic identification systems (AIS), which information is required to be broadcast every 1 to 10 seconds?
N a. Call sign and IMO number Y b. Course over ground and MMSI N c. MMSI number and call sign N d. Route Plan and navigational status