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.
16: The direction of the surface wind is __________.
N a. directly from high pressure toward low pressure N b. directly from low pressure toward high pressure Y c. from high pressure toward low pressure deflected by the earth's rotation N d. from low pressure toward high pressure deflected by the earth's rotation 28: When using a buoy as an aid to navigation which of the following should be considered?
N a. The buoy should be considered to always be in the charted location. N b. If the light is flashing, the buoy should be considered to be in the charted location. Y c. The buoy may not be in the charted position. N d. The buoy should be considered to be in the charted position if it has been freshly painted. 101: A lighted preferred-channel buoy may show a __________.
N a. fixed red light N b. Morse (A) white light Y c. composite group-flashing light N d. yellow light 118: What describes an accurate position that is NOT based on any prior position?
N a. Dead-reckoning position N b. Estimated position Y c. Fix N d. Running fix 168: Your vessel is making way through the water at a speed of 12 knots. Your vessel traveled 30 nautical miles in 2 hours 20 minutes. What current are you experiencing?
N a. A following current at 2.0 knots N b. A head current of 2.0 knots Y c. A following current of 0.9 knot N d. A head current of 0.9 knot 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 277: Your vessel goes aground in soft mud. You would have the best chance of refloating it on the next tide if it grounded at __________.
N a. low water neap Y b. low water spring N c. high water neap N d. high water spring 333: Loran-C stations transmit groups of pulses at specific times. The time interval between transmissions from the master station is the __________.
N a. coding delay Y b. group repetition interval N c. pulse interval N d. phase code 366: If an observer in the Northern Hemisphere faces the surface wind, the center of low pressure is to his______________.
N a. left, slightly behind him Y b. right, slightly behind him N c. left, slightly in front of him N d. right, slightly in front of him 389: The edge of a hurricane has overtaken your vessel in the Gulf of Mexico, and the northwest wind of a few hours ago has shifted to the west. This is an indication that you are located in the __________.
Y a. navigable semicircle N b. dangerous semicircle N c. low pressure area N d. eye of the storm 427: On 23 March 1983, at Kingston Point, NY, what is the earliest time after 1700 EST (ZD +5) that the predicted tide will be +2.0 feet?
N a. 1730 N b. 1800 Y c. 1854 N d. 2030 430: The southeast trade winds actually blow toward the __________.
N a. southeast N b. south N c. east Y d. northwest 454: On what does the operation of an aneroid barometer depend?
Y a. Thin, metal, air tight cell N b. Curved tube containing alcohol N c. Column of mercury supported by atmospheric pressure N d. Expansion of mercury in a closed tube 490: You are underway on course 050°T and your maximum speed is 10 knots. The eye of a hurricane bears 100°T, 90 miles from your position. The hurricane is moving towards 285°T at 19 knots. Which course should you steer at 10 knots to have the maximum CPA?
N a. 221° Y b. 226° N c. 233° N d. 238° 510: Which aid is NOT marked on a chart with a magenta circle?
Y a. Aero light N b. Radar station N c. Radar transponder beacon N d. Radio beacon 536: You are enroute from Puerto Rico to New York. A hurricane makes up and is approaching. If the wind veers steadily, this indicates that your vessel is __________.
Y a. in the dangerous semicircle N b. in the navigable semicircle N c. directly in the path of the storm N d. in the storm center 539: You are underway on course 050°T and your maximum speed is 13 knots. The eye of a hurricane bears 120°T, 100 miles from your position. The hurricane is moving towards 265°T at 25 knots. What course should you steer at 13 knots to have the maximum CPA?
Y a. 324°T N b. 306°T N c. 299°T N d. 276°T 557: Your vessel has a draft of 23 feet. On 23 June 1983 you wish to pass over a temporary obstruction near Beaufort, SC, that has a charted depth of 22 feet. Allowing for a safety margin of 3 feet, what is the earliest time after 1600 DST (ZD +4) that this passage can be made?
Y a. 1750 N b. 1815 N c. 1855 N d. 1944 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 597: You will be loading in Boston Harbor to a maximum draft of 32'06". The charted depth of an obstruction in the channel near Boston Light is 30 feet and you wish to have 3 feet of keel clearance. The steaming time from the pier to the obstruction is 01h 05m. What is the latest time (ZD +4) you can sail on 17 May 1983 and meet these requirements?
N a. 1610 Y b. 1728 N c. 1821 N d. 2350 660: What is the length of a nautical mile?
N a. 1,850 meters N b. 5,280 feet N c. 1,760 yards Y d. 6,076 feet 680: The apparent wind's speed can be zero, but only when two conditions are present. One condition is that the true __________.
N a. wind must be on the beam N b. wind's speed must be zero N c. wind must be from dead ahead Y d. wind's speed equals the ship's speed 747: The movement of water away from the shore or downstream is called a(n) __________.
N a. reversing current Y b. ebb current N c. flood current N d. slack current 821: In addition to monitoring channel 16, all Corps of Engineer locks may use as working channels __________.
N a. 06, 12 and 22A N b. 01A, 05A and 07A Y c. 12, 13 and 14 N d. 14, 24 and 28 846: Weather systems in the middle latitudes generally travel from __________.
N a. east to west N b. north to south Y c. west to east N d. None of the above 856: The flow of air around an anticyclone in the Southern Hemisphere is __________.
N a. clockwise and outward Y b. counterclockwise and outward N c. clockwise and inward N d. counterclockwise and inward 894: On a clear, warm day, you notice the approach of a tall cumulus cloud. The cloud top has hard well defined edges and rain is falling from the dark lower edge. Should this cloud pass directly overhead __________.
Y a. it will be preceded by a sudden increase in wind speed N b. it will be preceded by a sudden decrease in wind speed N c. the wind speed will not change as it passes N d. the wind will back rapidly to left in a counterclockwise direction as it passes 949: In Region A of the IALA Buoyage System, when entering from seaward, the port side of a channel would be marked by a __________.
N a. black can buoy Y b. red can buoy N c. black conical buoy N d. red conical buoy 994: Which list of clouds is in sequence, from highest to lowest in the sky?
N a. Altostratus, cirrostratus, stratus Y b. Cirrostratus, altostratus, stratus N c. Stratus, cirrostratus, altostratus N d. Altostratus, stratus, cirrostratus 1057: One of the causes of ocean currents is density differences in the water. This is true because __________.
N a. in an area of high density the water's surface is lower than in an area of low density Y b. surface water flows from an area of high density to one of low density N c. the lesser the density gradient the freer the water is to move N d. it is the density differences that cause the currents to stay in the troughs 1060: Isobars on a weather map are useful in predicting __________.
N a. temperature N b. dew point Y c. wind velocity N d. relative humidity 1154: The speed at which an ocean wave system advances is called __________.
N a. wave length N b. ripple length Y c. group velocity N d. wave velocity 1168: Which type of cloud is indicated by the number 4? (D039NG )
N a. Altocumulus N b. Cirrostratus N c. Cumulus Y d. Altostratus 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 1197: Off Fire Island, NY with winds from the southwest, the average wind-driven current flows in a direction of __________.
N a. 014° Y b. 076° N c. 170° N d. 256° 1254: Lighted white and orange buoys must show which color light?
N a. Orange Y b. White N c. Red N d. Alternating yellow and white 1319: The Sailing Directions (Planning Guide) contain information on all of the following EXCEPT __________.
Y a. coastal features N b. ocean basin environment N c. ocean routes N d. military operating areas 1439: The symbols shown are used on radio facsimile weather charts. The symbol indicated at letter "G" represents a __________. (D042NG )
N a. weather boundary N b. thunderstorm N c. wide spread sandstorm Y d. severe, line squall 1464: A line of position derived from a loran reading is a section of a(n) __________.
N a. straight line N b. arc N c. parabola Y d. hyperbola 1488: What defines a great circle?
N a. A curved line drawn on a Mercator Chart N b. A course line that inscribes a loxodromic curve Y c. The shortest distance between any two points on the earth N d. The smallest circle that can be drawn on the face of a sphere 1558: As a high pressure system approaches, the barometer reading __________.
N a. stays the same N b. falls Y c. rises N d. falls rapidly 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 1633: To find a magnetic compass course from a true course you must apply __________.
Y a. deviation and variation N b. deviation N c. variation N d. magnetic anomalies (local disturbances) 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 1661: Advection fog may be formed by warm moist air passing over a __________.
N a. warmer sea surface Y b. cooler sea surface N c. dry coastal plain N d. polar land mass 1715: The hurricane season generally occurs from __________.
N a. August to January N b. July to December Y c. June to November N d. January to June 1726: How can you estimate the position of a tropical storm's center?
N a. With a radio weather bulletin or weather fax N b. using shipboard radar N c. observe the wind direction and apply Buys Ballot's law Y d. All of the above 1859: While proceeding downriver (descending) you sight a red diamond-shaped panel with small, red reflector squares in each corner on the left bank. Under the U.S. Aids to Navigation System on the Western Rivers this is a __________.
N a. special purpose signal N b. passing daymark Y c. crossing daymark N d. cable crossing 1904: In the horizon system of coordinates what is equivalent to the parallels of declination of the celestial equator system?
N a. Vertical circles Y b. Parallels of altitude N c. Zenith distance N d. Azimuth angle 1908: What is the brightest navigational planet?
N a. Saturn N b. Jupiter N c. Mars Y d. Venus 1916: The prime vertical is the reference point from which the angle of which type of observation is measured?
N a. Sextant angle N b. Azimuth Y c. Amplitude N d. Local apparent noon 2229: A vessel is heading magnetic north and its magnetic compass indicates a heading of 003°. What action should be taken to remove this error during compass adjustment?
Y a. If the red ends are to port the athwartships magnets should be raised. N b. If the blue ends are to port the athwartships magnets should be raised. N c. If the red ends are forward the fore-and-aft magnets should be lowered. N d. If the blue ends are forward the fore-and-aft magnets should be raised. 2439: Which statement about the time diagram in illustration D008NG is TRUE? (D008NG )
Y a. You are in east longitude. N b. The Sun is setting for you. N c. Your date is different from the Greenwich date. N d. The GHA is approximately 160°. 2489: You are approaching a drawbridge and must pass through during a scheduled closure period. What signal should you sound?
Y a. Five short blasts N b. Two prolonged, two short blasts N c. Three prolonged blasts N d. Three short blasts, two prolonged blasts 2498: The light characteristic of flashing is used in the Aids to Navigation System on the Western Rivers for lights on __________.
Y a. the right descending bank N b. the left descending bank N c. preferred channel buoys N d. daymarks with no lateral significance 2589: Under the IALA cardinal system, a mark with a quick white light showing 6 flashes followed by one long flash indicates that the safest water is on the __________.
N a. north side of the mark N b. west side of the mark N c. east side of the mark Y d. south side of the mark 2718: A power-driven vessel operating in a narrow channel with a following current, on the Western Rivers, is meeting an upbound vessel. Which statement is TRUE?
N a. The downbound vessel has the right-of-way. N b. The downbound vessel must initiate the required maneuvering signals. N c. The downbound vessel must propose the manner and place of passage. Y d. All of the above 2945: A position that is obtained by applying estimated current and wind to your vessel's course and speed is a(n) __________.
Y a. estimated position N b. dead reckoning position N c. fix N d. None of the above 3095: ECDIS must have the capability to preserve the record of the track for the previous __________.
N a. 6 hours Y b. 12 hours N c. 18 hours N d. 24 hours 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