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.
27: Spring tides are tides that __________.
Y a. have lows lower than normal and highs higher than normal N b. have lows higher than normal and highs lower than normal N c. are unpredictable N d. occur in the spring of the year 77: When there are small differences between the heights of two successive high tides or two low tides, in a tidal day, the tides are called __________.
N a. diurnal Y b. semidiurnal N c. solar N d. mixed 99: 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 __________.
N a. smoother seas and warmer water Y b. steeper waves, closer together N c. long swells N d. cirrus clouds 116: Which wind results from a land mass cooling more quickly at night than an adjacent water area?
N a. Coastal breeze N b. Sea breeze Y c. Land breeze N d. Mistral 128: A position obtained by applying only your vessel's course and speed to a known position is a __________.
Y a. dead-reckoning position N b. fix N c. probable position N d. running fix 182: The scale on a chart is given as 1:5,000,000. This means that __________.
N a. 1 inch is equal to 5,000 inches on the Earth's surface N b. 1 nautical mile on the chart is equal to 5,000 inches on the Earth's surface Y c. 1 inch is equal to 5,000,000 inches on the Earth's surface N d. 1 nautical mile on the chart is equal to 5,000,000 inches on the Earth's surface 208: The moon is full and at perigee on 20 January 1983. What is the maximum current you could expect at 2350 (ZD +5) at Nantucket Shoals?
N a. 0.5 knot N b. 0.7 knot N c. 0.8 knot Y d. 1.0 knot 221: In United States waters, a buoy having red and white vertical stripes has a light characteristic of __________.
N a. group occulting Y b. Morse (A) N c. interrupted quick flashing N d. quick flashing 278: You are underway on course 050°T and your maximum speed is 11 knots. The eye of a hurricane bears 070°T, 80 miles from your position. The hurricane is moving towards 270°T at 19 knots. If you maneuver at 11 knots to avoid the hurricane, what could be the maximum CPA?
N a. 84 miles N b. 79 miles N c. 74 miles Y d. 66 miles 312: The depth of water on a chart is indicated as 23 meters. This is equal to __________.
N a. 11.5 fathoms Y b. 12.6 fathoms N c. 69.0 feet N d. 78.6 feet 338: The illustration shows the symbols used on radio facsimile weather charts. The symbol indicated at letter "N" represents __________. (D042NG )
N a. hail N b. freezing rain Y c. rain N d. snow 339: The wind at Frying Pan shoals has been north-northeasterly at an average velocity of 30 knots. The predicted set and drift of the rotary current are 355° at 0.8 knot. What current should you expect?
N a. 010° at 1.1 knots N b. 047° at 0.3 knot Y c. 325° at 0.7 knot N d. 279° at 1.0 knot 432: When using a Lambert conformal chart in high latitudes, angles such as bearings are measured in reference to __________.
N a. the meridian through the object of the bearing Y b. the meridian through the ship's position N c. the meridian midway between the ship and the object N d. any meridian 474: Which indication on the barometer is most meaningful in forecasting weather?
N a. The words "Fair -- Change -- Rain" Y b. The direction and rate of change of barometric pressure N c. The actual barometric pressure N d. The relative humidity 502: A gnomonic projection is based on a(n) __________.
Y a. plane tangent at one point N b. cylinder tangent at the equator N c. cone tangent at one parallel N d. infinite series of cones tangent at selected parallels 565: The letter B as shown represents the __________. (D006NG )
Y a. geoidal horizon N b. celestial horizon N c. visible horizon N d. sensible horizon 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 709: A sea breeze is a wind __________.
N a. that blows towards the sea at night Y b. that blows towards an island during the day N c. caused by cold air descending a coastal incline N d. caused by the distant approach of a hurricane 738: Most GPS receivers use the Doppler shift of the carrier phase to compute __________.
N a. Latitude N b. Longitude Y c. Speed N d. Time 804: A relative bearing is always measured from __________.
N a. true north N b. magnetic north N c. the vessel's beam Y d. the vessel's head 940: What is the length of a nautical mile?
Y a. 6,076 feet N b. 5,280 feet N c. 2,000 yards N d. 1,850 meters 968: The world is divided into NAVAREAS for the dissemination of important marine information. Which NAVAREAS include the U.S. coasts?
N a. I and II Y b. IV and XII N c. V and X N d. VI and VII 1024: The dew point is reached when the __________.
N a. temperature of the air equals the temperature of the seawater N b. atmospheric pressure is 14.7 lbs. per square inch N c. relative humidity reaches 50% Y d. air becomes saturated with water vapor 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 1067: The two most effective generating forces of surface ocean currents are __________.
N a. temperature and salinity differences in the water Y b. wind and density differences in the water N c. water depth and underwater topography N d. rotation of the Earth and continental interference 1329: Yesterday your chronometer read 03h 01m 56s at the 1500 GMT time tick. Today your chronometer read 03h 01m 54s at the 1500 GMT time tick. What is the chronometer rate?
N a. 1m 54s fast N b. 2s fast Y c. -2s N d. +2s 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 1403: Which statement about the gyrocompass is FALSE?
Y a. Its accuracy remains the same at all latitudes. N b. It seeks the true meridian. N c. It can be used near the Earth's magnetic poles. N d. If an error exists, it is the same on all headings. 1535: When observing a rapid rise in barometric pressure, you may expect __________.
N a. clear weather with no wind, but the possibility of rain or snow within 24 hours N b. deteriorating weather with rain or snow N c. heavy rain or severe thundershowers Y d. clearing weather, possibly accompanied by high winds 1547: Which light combination does NOT indicate a navigational channel passing under a fixed bridge?
Y a. Red lights on the LDB and green lights on the RDB N b. Three white lights in a vertical line N c. Two green lights in a range under the span N d. A fixed red light on each pier at the channel edge 1588: The letter D in illustration D006NG represents the __________.
Y a. geometrical horizon N b. geoidal horizon N c. celestial horizon N d. visible horizon 1599: The time interval between successive wave crests is called the __________.
N a. trough Y b. period N c. frequency N d. epoch 1751: A tsunami is caused by a(n) __________.
N a. tidal wave N b. storm surge caused by a hurricane or tropical storm Y c. earthquake on the ocean's floor N d. tornado 1770: A Doppler speed log indicates speed over ground __________.
N a. at all times Y b. in the bottom return mode N c. in the volume reverberation mode N d. only when there is no current 1807: Which weather system produces strong cold winds called "Northers" during the winter months in the Gulf of Mexico?
N a. A polar maritime air mass Y b. A high pressure system N c. A cyclone N d. A low pressure system 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 2112: Vessels regularly navigating rivers above Cairo, Illinois, shall at all times have on board a copy of __________.
N a. U.S. Coast Pilot Y b. U.S. Army Corps of Engineers Regulations (Blue Book) N c. Nautical Almanac for the year N d. Light List Vol. V 2140: The visible range marked on charts for lights is the __________.
N a. minimum distance at which the light may be seen with infinite visibility N b. minimum distance at which the light may be seen based on a 12 mile distance to visible horizon N c. maximum distance the light may be seen restricted by the height of the light and the curvature of the earth Y d. maximum distance at which a light may be seen in clear weather with 10 miles visibility 2202: You have completed the magnetic compass adjustments on magnetic east and magnetic south. The vessel is now steady on magnetic west but the compass reads 276°. What action should be taken?
N a. Adjust the compass with the athwartships magnets until the compass reads 264°. Y b. Adjust the compass with the fore-and-aft magnets until the compass reads 273°. N c. Adjust the compass with the quadrantal spheres until the compass reads 270°. N d. Adjust the compass with the athwartships magnets until the compass reads 273°. 2211: What is the length of a nautical mile?
N a. 1,850 meters Y b. 6,076 feet N c. 5,280 feet N d. 2,000 yards 2215: You are required to enter a lock on your voyage. Information on the lock regulations, signals, and radio communications can be found in __________.
N a. the publication "Key to the Locks" N b. Bowditch N c. Corps of Engineers Information Bulletin Y d. Coast Pilot 2255: The height of tide is the __________.
N a. depth of water at a specific time due to tidal effect N b. difference between the depth of the water at high tide and the depth of the water at low tide N c. difference between the depth of the water and the high water tidal level Y d. difference between the depth of the water and the area's tidal datum 2276: A vessel is heading magnetic east and its magnetic compass indicates a heading of 086°. Which action should be taken to remove this error during compass adjustment?
Y a. If the blue ends of the magnets are aft, and the fore-and-aft tray is at the top, you should add some magnets. N b. If the blue ends of the magnets are aft you should lower the fore-and-aft tray. N c. If the blue ends of the magnets are aft, and the fore-and-aft tray is at the top, you should reverse the magnets. N d. If the blue ends of the magnets are forward, and the fore-and-aft tray is at the bottom, you should add some magnets. 2353: A single line of position combined with a dead-reckoning position results in a(n) __________.
Y a. estimated position N b. assumed position N c. fix N d. running fix 2382: What causes geocentric parallax?
N a. The varying distance between the Earth and Moon. Y b. The change in the Moon's position relative to the stars when viewed from the Earth's surface, as compared to the Earth's center. N c. The rapid change in declination of the Moon causes a rotational oscillation of its axis. N d. The nearness of the Moon causes an apparent increase in diameter as its altitude increases. 2419: A backlash below a lock is defined as a __________.
N a. current setting your vessel on the wall N b. current setting into the lock chamber Y c. an eddy working along the lower guide wall N d. current setting counterclockwise 2442: You have completed the magnetic compass adjustments on magnetic east and magnetic south. The vessel is now steady on magnetic north but the compass reads 004°. You should now adjust the compass until it reads __________.
N a. 356° N b. 358° N c. 000° Y d. 002° 2525: Daylight savings time is a form of zone time that adopts the time __________.
N a. two zones to the west N b. two zones to the east N c. one zone to the west Y d. one zone to the east 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 2798: A can buoy is indicated by which letter in illustration D044NG?
Y a. A N b. B N c. C N d. D 2836: The correction tables in the front of the Nautical Almanac for use with sun sights do NOT include the effects of __________.
N a. mean refraction N b. parallax N c. semidiameter Y d. irradiation 2877: Class I and II private aids to navigation in or along navigable waters of the United States are listed in the __________.
N a. Sailing Directions Y b. Light List N c. List of Private Aids N d. Aids to Navigation Manual 2908: A daymark used to indicate the port side of the channel when approaching from seaward is indicated by what letter in illustration D045NG?
Y a. A N b. B N c. C N d. D 2964: The pictures shown represent the geographic location of a vessel and the radar presentation at the same time. Which statement is TRUE? (D011NG )
N a. Ship No. 1 does not paint as an individual target due to the side lobe affect. N b. The small island is not detected due to the limitation caused by the pulse length. N c. A tangent bearing of the headland to the south-southeast is corrected by subtracting one-half of the beam width. Y d. Ship No. 2 is not detected due to the combined affects of beam width and pulse length. 2979: You take a bearing of 356° of a lighthouse. What bearing of another object would give the best fix?
N a. 013° Y b. 082° N c. 176° N d. 201° 3007: A rotary current sets through all directions of the compass. The time it takes to complete one of these cycles, in a locale off the East coast of the US, is approximately __________.
N a. 2 1/2 hours N b. 3 1/2 hours N c. 6 1/4 hours Y d. 12 1/2 hours 3056: A position obtained by applying ONLY your vessel's course and speed to a known position is a __________.
N a. fix Y b. dead-reckoning position N c. running fix N d. probable position 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 3090: NOAA VHF weather reports are continuously broadcast on VHF channels WX-1, WX-2 and WX-3 on a frequency of __________.
N a. 156.8, 157.1, 162.55 MHz N b. 162.55, 162.00, 171.5 KHz Y c. 162.55, 162.40, 162.475 MHz N d. 2182, 2638, 2670 KHz 3110: While underway, automatic identification systems (AIS) broadcast all of the following information every 1 to 10 seconds EXCEPT the __________.
N a. speed over ground N b. latitude and longitude N c. course over ground Y d. ship's scantlings