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.
15: What is the length of a nautical mile?
N a. 1,800 meters N b. 2,000 yards Y c. 6,076 feet N d. 5,280 feet 58: You should plot your dead reckoning position __________.
N a. at every course change N b. hourly N c. at every speed change Y d. All of the above are correct. 193: In using Loran-C, skywave reception gives greater range but is __________.
N a. only accurate during daylight hours Y b. much less accurate N c. only accurate at twilight N d. more accurate than using ground waves 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 306: Weather conditions in the middle latitudes generally move __________.
Y a. eastward N b. westward N c. northward N d. southward 316: According to Buys Ballot's law, when an observer in the Northern Hemisphere experiences a northwest wind, the center of low pressure is located to the __________.
Y a. northeast N b. west-southwest N c. northwest N d. south-southeast 388: You are underway on course 120°T and your maximum speed is 12 knots. The eye of a hurricane bears 150°T, 120 miles from your position. The hurricane is moving towards 295°T at 20 knots. If you maneuver at 12 knots to avoid the hurricane, what could be the maximum CPA?
N a. 89 miles N b. 96 miles N c. 105 miles Y d. 117 miles 394: An instrument designed to maintain a continuous record of atmospheric pressure is a(n) __________.
N a. mercurial barometer N b. aneroid barometer Y c. barograph N d. thermograph 412: If you were sailing in the North Pacific and were interested in the ice and iceberg limits, you could find this information in the __________.
Y a. Pilot Chart N b. Coast Pilot N c. Notice to Mariners N d. None of the above 441: A yellow buoy may exhibit a(n) __________.
N a. fixed red light Y b. flashing light N c. white light N d. occulting light 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 698: You are in LONG 165°E, zone time at 0400, 1 November 1981. What is the zone time and date in LONG 165°W?
Y a. 0600, 31 October N b. 1800, 31 October N c. 1800, 1 November N d. 0600, 1 November 731: Under the IALA Buoyage Systems, a vertically-striped buoy may be striped red and __________.
N a. green N b. black Y c. white N d. yellow 770: You are plotting a running fix in an area where there is a determinable current. How should this current be treated in determining the position?
Y a. The course and speed made good should be determined and used to advance the LOP. N b. The drift should be added to the ship's speed. N c. The current should be ignored. N d. The set should be applied to the second bearing. 782: Mariners are FIRST warned of serious defects or important changes to aids to navigation by means of __________.
Y a. marine broadcast Notice to Mariners N b. Weekly Notices to Mariners N c. corrected editions of charts N d. Light Lists 813: At the magnetic equator there is no induced magnetism in the vertical soft iron because __________.
N a. the lines of force cross the equator on a 0°-180° alignment N b. the quadrantal error is 0° Y c. there is no vertical component of the Earth's magnetic field N d. the intercardinal headings have less than 1° error 841: Under the IALA-A Buoyage system, a buoy marking the port hand of the channel when approaching from seaward may NOT have a __________.
N a. red light Y b. conical shape N c. group-flashing light N d. square topmark 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 910: The Light List shows that a navigational light has a nominal range of 12 miles and a height above water of 25 feet (7.6 meters). Your height of eye is 38 feet (11.6 meters) and the visibility is 5.5 miles. At what approximate range will you FIRST sight the light?
N a. 5.5 miles N b. 6.3 miles Y c. 8.0 miles N d. 12.0 miles 934: Clouds that form as small white flakes or scaly globular masses covering either small or large portions of the sky are __________.
N a. cirrus N b. cirrostratus N c. altostratus Y d. cirrocumulus 956: Good weather is usually associated with a region of __________.
N a. low barometric pressure Y b. high barometric pressure N c. falling barometric pressure N d. pumping barometric pressure 1007: When a current flows in the opposite direction to the waves, the wave __________.
N a. length is increased Y b. height is increased N c. velocity increases N d. length is unchanged 1038: You are preparing a weather report form, WS Form B-80. The dry bulb thermometer reads 54°F, and the wet bulb thermometer reads 50°F. How would you encode the air temperature groups in the report? (D041NG )
N a. 1054/, 2050/ Y b. 10122, 2008/ N c. 1054/, 2047/ N d. 054//, 047// 1118: When entering from seaward, a buoy displaying a single-flashing red light indicates __________.
N a. a junction with the preferred channel to the left Y b. the starboard side of the channel N c. a sharp turn in the channel to the right N d. a wreck to be left on the vessel's port side 1221: On a chart, the characteristic of the light on a lighthouse is shown as flashing white with a red sector. The red sector __________.
N a. indicates the limits of the navigable channel Y b. indicates a danger area N c. is used to identify the characteristics of the light N d. serves no significant purpose 1248: On 6 July 1983, at 1520 DST (ZD +4) what will be the predicted height of tide at Newburgh, NY?
N a. 2.1 feet N b. 1.7 feet N c. 1.2 feet Y d. 0.6 foot 1309: When recording the wind direction in the weather log, you would report the __________.
N a. direction the wind is blowing toward Y b. direction the wind is blowing from N c. duration of the maximum gust of wind N d. wind chill factor 1357: You will transit the Cape Cod Canal on 7 November 1983. If you arrive at the R R Bridge at 1655 EST (ZD +5), for what period of time during your transit will you have currents of not more than 0.5 knot?
N a. 1631 to 1719 N b. 1638 to 1655 Y c. 1648 to 1702 N d. 1655 to 1709 1389: A boundary between two air masses is a(n) __________.
N a. lapse rate N b. isobar Y c. front N d. continent 1419: The MOST important feature of the material used for making the binnacle of a standard magnetic compass is that it is __________.
Y a. nonmagnetic N b. weatherproof N c. corrosion resistant N d. capable of being permanently affixed to the vessel 1437: Determine the time after 0300 CST (ZD +6) when the velocity of the tidal current will be 0.5 knot on 16 April 1983, at Port Arthur Canal Entrance, TX.
N a. 0436 Y b. 0507 N c. 0538 N d. 0554 1444: Stratocumulus clouds are indicated by which number? (D039NG )
N a. 1 N b. 4 Y c. 6 N d. 7 1445: The planet Mars will have its greatest magnitude when at __________.
N a. conjunction Y b. opposition N c. east quadrature N d. west quadrature 1505: At 0000 you fix your position and change course to 090°T. At 0030 you again fix your position and it is 0.5 mile east of your DR. Which statement is TRUE?
Y a. The current is easterly. N b. The drift is 0.5 knot. N c. You should alter course to the right to regain the track line. N d. The current is perpendicular to your track line. 1510: During daylight savings time the meridian used for determining the time is located farther __________.
N a. west Y b. east N c. east in west longitude and west in east longitude N d. west in west longitude and east in east longitude 1517: When determining compass error by an azimuth of Polaris, you enter the Nautical Almanac with the __________.
N a. GHA Aries Y b. LHA Aries N c. LHA Polaris N d. GHA Polaris 1522: The pressure-sensitive element of an aneroid barometer is called a __________.
N a. pressure bellows Y b. sylphon cell N c. column of mercury N d. constant pressure capsule 1599: The time interval between successive wave crests is called the __________.
N a. trough Y b. period N c. frequency N d. epoch 1676: Lighted information markers show __________.
N a. green lights Y b. white lights N c. yellow lights N d. red lights 1704: If the center of low pressure is due west of you in the Northern Hemisphere, which wind direction should you expect?
N a. South to west Y b. South to east N c. West to north N d. North to east 1711: An instrument that indicates wind direction is known as a(n) __________.
Y a. weather vane, wind vane or wind sock N b. hydrometer N c. hygrometer N d. sling psychrometer 1816: A white buoy with an orange circle marked on it indicates __________.
N a. danger N b. vessels are excluded from the area N c. a mooring buoy Y d. operating restrictions are in effect 1900: A parallax correction is NOT applied to observations of the __________.
Y a. stars N b. Moon N c. Sun N d. Planets 2214: By convention, the Earth's south magnetic pole is colored __________.
N a. blue N b. black N c. white Y d. red 2363: As shown, the position labeled C was plotted because __________. (D051NG )
N a. the vessel's speed changed N b. the vessel's course changed form due North to due East Y c. running fixes are better estimates of true position than dead-reckoning positions N d. All of the above are correct 2373: The vertical distance from the tidal datum to the level of the water is the __________.
N a. actual water depth N b. range of tide N c. charted depth Y d. height of tide 2381: The difference between the heights of low and high tide is the __________.
N a. period N b. distance N c. depth Y d. range 2488: In which publication could you find information concerning the minimum lighting required for bridges on U.S. waters?
N a. Chart No. 1. Y b. Code of Federal Regulations N c. Mississippi River Systems Light List N d. Notice to Mariners 2538: The light characteristic of composite group flashing (2 + 1) is used in the Aids to Navigation System on the Western Rivers for lights on __________.
N a. the right descending bank N b. the left descending bank Y c. preferred-channel buoys N d. daymarks with no lateral significance 2610: A line on the Earth parallel to the equator is a __________.
N a. gnomonic curve Y b. small circle N c. meridian N d. great circle 2638: A vessel crossing a river on the Western Rivers has the right of way over __________.
N a. vessels ascending the river N b. vessels descending the river N c. all vessels ascending and descending the river Y d. None of the above 2672: When you are steering on a pair of range lights and find the upper light is in line above the lower light, you should __________.
Y a. continue on the present course N b. come left N c. come right N d. wait until the lights are no longer in a vertical line 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 2704: The Light List shows a lighted aid to navigation on the right bank. This means that the light can be seen on the starboard side of a vessel __________.
N a. proceeding from seaward N b. crossing the river N c. ascending the river Y d. descending the river 2876: On 13 November 1981 you observe a back sight of the lower limb of the Sun. The sextant altitude (hs) is 109°23.6'. The height of eye is 66 feet, and the index error is 2.0' off the arc. What is the observed altitude (Ho)?
N a. 71°01.2' Y b. 70°57.2' N c. 70°45.4 N d. 70°26.4' 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 2938: You take a bearing of 176° of a lighthouse. What bearing of another object would give the best fix?
N a. 000° N b. 021° N c. 189° Y d. 272° 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 3040: Which instrument is used to predict the approach of a low pressure system?
N a. Anemometer N b. Fathometer Y c. Barometer N d. Thermometer 3115: With respect to automatic identification systems (AIS), which information is required to be broadcast every 1 to 10 seconds?
Y a. Time stamp N b. Destination N c. Location of antenna N d. None of the above