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 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 127: Mean low water is the average height of __________.
N a. the surface of the sea N b. high waters and low waters Y c. all low waters N d. the lower of the two daily low tides 175: On 5 July 1981, at 1200 zone time, you cross the 180th meridian steaming westward. What is your local time?
N a. It is 1200, 4 July. N b. It is 1200, 5 July. Y c. It is 1200, 6 July. N d. It is 2400, 6 July. 197: Chart legends printed in capital letters show that the associated landmark is __________.
Y a. conspicuous N b. inconspicuous N c. a government facility or station N d. a radio transmitter 197: Chart legends printed in capital letters show that the associated landmark is __________.
Y a. conspicuous N b. inconspicuous N c. a government facility or station N d. a radio transmitter 253: Loran-C is which type of system?
N a. Reflected electron N b. Electrical radiation N c. Quarterpoint electrical navigation Y d. Hyperbolic radio navigation 328: The direction of prevailing winds in the Northern hemisphere is caused by the __________.
N a. magnetic field at the North Pole N b. Gulf Stream Y c. Earth's rotation N d. Arctic cold fronts 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 397: The mean tide level at Peaks Island, ME, is __________.
N a. 1.8 feet (0.5 meters) N b. 2.5 feet (0.8 meters) N c. 3.2 feet (1.0 meters) Y d. 4.5 feet (1.4 meters) 415: If the Sun's observed altitude is 54°30', what is the zenith distance?
Y a. 35°30' N b. 45°30' N c. 12°30' N d. 14°30' 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 481: A special mark (yellow buoy), if lighted, may exhibit which light rhythm?
Y a. Flashing N b. Morse "A" N c. Equal interval N d. Occulting 513: You are radar scanning for a buoy fitted with a racon. Which radar screen represents the presentation you should expect on the PPI? (D017NG )
N a. A Y b. B N c. C N d. D 532: In a river subject to tidal currents, the best time to dock a ship without the assistance of tugs is __________.
N a. at high water Y b. at slack water N c. at flood tide N d. when there is a following current 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 629: The rise and fall of the ocean's surface due to a distant storm is known as __________.
N a. sea N b. waves N c. fetch Y d. swell 634: What will cause the ARPA to emit a visual alarm, audible alarm, or both?
N a. An acquired target entering into a guard zone N b. A tracked target lost for one radar scan Y c. A tracked target entering your preset CPA-TCPA limits N d. A target being initially detected within a guard zone 643: When using the radar for navigating __________.
N a. the best fix is obtained by using a tangent bearing and a range N b. and using two radar ranges for a fix, the objects of the ranges should be close to reciprocal bearings Y c. and using ranges, the most rapidly changing range should be measured last N d. and crossing a radar range of one object with the visual bearing of a second object, the two objects should be 80° to 110° apart 665: 17 degrees of latitude is equal to __________.
N a. 68 miles N b. 510 miles Y c. 1020 miles N d. 4080 miles 780: Apparent wind speed blowing across your vessel while underway can be measured by a(n) __________.
N a. barometer N b. wind vane Y c. anemometer N d. thermometer 817: Which current would you encounter on a direct passage from London, England, to Cape Town, South Africa?
N a. Falkland Current N b. Brazil Current N c. Norway Current Y d. Benguela Current 833: The magnetic compass magnets are acted on by the horizontal component of the Earth's total magnetic force. This magnetic force is GREATEST at the __________.
N a. north magnetic pole N b. south magnetic pole N c. magnetic prime vertical meridian Y d. magnetic equator 912: The Light List Does NOT contain information on __________.
N a. the Global Positioning System (GPS) Y b. aeronautical lights useful for marine navigation N c. radio beacon systems N d. radio direction finder calibration stations 959: What is the index error of sextant B in illustration D050NG? (D050NG )
N a. 0'30" off the arc N b. 1'00" off the arc Y c. 3'30" off the arc N d. 1'30" on the arc 983: Error may be introduced into a magnetic compass by __________.
N a. making a structural change to the vessel N b. a short circuit near the compass N c. belt buckles Y d. All of the above 1025: A first magnitude star is __________.
Y a. 2.5 times as bright as a second magnitude star N b. 3 times as bright as a second magnitude star N c. 5 times as bright as a second magnitude star N d. 10 times as bright as a second magnitude star 1168: Which type of cloud is indicated by the number 4? (D039NG )
N a. Altocumulus N b. Cirrostratus N c. Cumulus Y d. Altostratus 1201: What is NOT true concerning color sectors of lights?
Y a. Color sectors are expressed in degrees from the light toward the vessel. N b. Color sectors may indicate dangerous waters. N c. Color sectors may indicate the best water across a shoal. N d. Color sectors may indicate a turning point in a channel. 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) 1263: The compass deviation changes as the vessel changes __________.
N a. geographical position N b. speed Y c. heading N d. longitude 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 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 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 1563: Neap tides occur only __________.
N a. at a new or full Moon N b. when the Sun, Moon, and Earth are in line N c. at approximately 28-day intervals Y d. when the Moon is at quadrature 1714: Which statement concerning storm surges on the Great Lakes is FALSE?
Y a. They are common along the deeper areas of the lakes. N b. They cause rapid differences in levels between one end of the lake and the other. N c. The greatest water level difference occurs when the wind is blowing along the longitudinal axis of the lake. N d. If the wind subsides rapidly, a seiche effect will most likely occur. 1754: The dumping of refuse in a lock is permitted __________.
N a. when approved by the lockmaster N b. when locking downbound Y c. at no time N d. during high water only 1812: The line of position should be plotted as a circle around the GP of the body when the Ho exceeds what minimum value?
N a. 80° N b. 83° N c. 85° Y d. 87° 1899: What is the relative bearing of an object broad on the starboard beam?
N a. 045° N b. 060° N c. 075° Y d. 090° 1961: What kind of pressure systems travel in tropical waves?
N a. Subsurface pressure N b. Terrastatic pressure N c. High pressure Y d. Low pressure 2000: A vessel heading SE is on a course of __________.
N a. 112.5° Y b. 135.0° N c. 157.5° N d. 180.0° 2159: Induced magnetism is found in __________.
N a. hard iron Y b. soft iron N c. vertical iron only N d. horizontal iron only 2203: You get underway from the shipyard in Chester, PA, at 1515 DST (ZD +4) on 6 August 1983, enroute to sea. You will be turning for eight knots. What current can you expect at Fourteen Foot Bank Light?
N a. Slack Y b. 1.3 knots ebbing N c. 1.7 knots ebbing N d. 0.5 knot ebbing 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. 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 2362: 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°. Which action should be taken?
N a. Use the Flinders bar and adjust the compass until it reads 002°. N b. Use the fore-and-aft magnets and adjust the compass until it reads 000°. Y c. Use the athwartships magnets and adjust the compass until it reads 002°. N d. Use the athwartships magnets and adjust the compass until it reads 000°. 2378: Which light signal indicates that you may approach the lock?
N a. Flashing red Y b. Flashing amber N c. Steady amber N d. Steady green 2572: The dividing meridian between zone descriptions -4 and -5 is __________.
N a. 60°00'E Y b. 67°30'E N c. 75°00'E N d. 60°00'W 2586: A chart has extensive corrections to be made to it. When these are made and the chart is again printed, the chart issue is a __________.
N a. first edition Y b. new edition N c. revised edition N d. reprint 2669: Under the IALA Buoyage System, which topmark shown will be displayed on a safe water mark? (D023NG )
Y a. A N b. B N c. C N d. D 2682: Sidereal time is used by navigators when __________.
N a. used with the equation of time Y b. used in the form of LHA Aries N c. calculating the time of moonrise N d. determining local apparent time 2796: The correction tables in the Nautical Almanac for use with Moon sights do NOT include the effects of __________.
Y a. instrument error N b. augmentation N c. semidiameter N d. parallax 2805: You are entering port and have been instructed to anchor, as your berth is not yet available. You are on a SW'ly heading, preparing to drop anchor, when you observe the range as shown on your starboard beam. You should __________. (D047NG )
N a. drop the anchor immediately as the range lights mark an area free of obstructions N b. drop the anchor immediately as a change in the position of the range lights will be an indication of dragging anchor N c. NOT drop the anchor until the lights are in line Y d. ensure your ship will NOT block the channel or obstruct the range while at anchor 2828: The daily recurring pattern of pressure changes most noticeable in low latitudes is the __________.
N a. daily lapse reading Y b. diurnal variation of pressure N c. pressure tendency N d. synoptic pressure 2869: A pillar buoy is indicated by which letter shown in the illustration? (D044NG )
N a. A N b. B Y c. C N d. D 3053: The vertical distance from the tidal datum to the level of the water is the __________.
Y a. height of tide N b. range of tide N c. actual water depth N d. charted depth 3071: The level of database information which cannot be removed from the ECDIS display and consists of information which is required at all times in all geographic areas and under all circumstances is the __________.
Y a. display base information N b. standard display information N c. system electronic nautical chart N d. chart display information 3075: Chart information details to be used in ECDIS should be the latest edition of information originated by a government-authorized hydrographic office and conform to the standards of (the) __________.
N a. International Maritime Organization Y b. International Hydrographic Organization N c. NASA N d. US Coast Guard 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 3119: Automatic identification systems (AIS) are required to __________.
N a. provide safety-related information automatically to shore stations, other vessels and aircraft N b. receive safety-related information automatically from similarly equipped vessels N c. exchange safety-related information with shore-based facilities Y d. All of the above