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 67: What is the definition of height of tide?
Y a. The vertical distance from the tidal datum to the level of the water at any time N b. The vertical difference between the heights of low and high water N c. The vertical difference between a datum plane and the ocean bottom N d. The vertical distance from the surface of the water to the ocean floor 81: A buoy with a composite group-flashing light indicates a(n) __________.
Y a. bifurcation N b. fish net area N c. anchorage area N d. dredging area 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 211: The light rhythm of Morse (A) is shown on __________.
N a. preferred-channel buoys N b. starboard- or port-side buoys N c. special marks Y d. safe water buoys 281: A lighted buoy to be left to starboard, when entering a U.S. port from seaward, shall have a __________.
N a. white light Y b. red light N c. green light N d. light characteristic of Morse (A) 302: Which symbol represents a 20-fathom curve?
Y a. -..-..-..-..- N b. - - - - - - - - N c. - - . - - . - - . - - . N d. - - - - - - - - 467: At what time after 1400 EST (ZD +5), on 4 January 1983, will the height of the tide at Port Wentworth, GA, be 3.0 feet?
N a. 1612 N b. 1630 Y c. 1653 N d. 1718 512: On a gnomonic chart, a great circle track between Los Angeles and Brisbane will appear as a __________.
N a. loxodromic curve N b. curved line concave to the equator Y c. straight line N d. spiral approaching the poles as a limit 530: Under the U.S. Aids to Navigation System, a lighted buoy with a spherical topmark marks __________.
N a. the port side of the channel N b. the position of underwater cables Y c. safe water N d. a hazard to navigation 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 556: In a tropical cyclone in the Northern Hemisphere, a vessel hove to with the wind shifting counterclockwise would be __________.
Y a. in the navigable semicircle N b. in the dangerous semicircle N c. directly in the path of the center N d. ahead of the storm 714: When using the ARPA in heavy rain, which action should you take?
N a. Increase the radar gain to pick up weak echoes through the rain. N b. Increase the STC setting to reduce close-in spurious signals. Y c. Navigate as though the effective range of the radar has been reduced. N d. Increase the range of the inner and outer guard rings. 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 824: An "atoll cloud" forming over an island due to heating of the land during the daytime would be which type?
N a. Cirrus Y b. Cumulus N c. Stratus N d. Nimbus 857: The current that, in many respects, is similar to the Gulf Stream is the __________.
Y a. Kuroshio N b. California Current N c. Oyashio N d. Benguela Current 944: High clouds, composed of small white flakes or scaly globular masses, and often banded together to form a "mackerel sky", would be classified as __________.
N a. cirrus Y b. cirrocumulus N c. altostratus N d. cumulonimbus 1012: General information about the location, characteristics, facilities, and services for U.S. and foreign ports may be obtained from which publication?
Y a. World Port Index N b. Sailing Directions N c. Distances Between Ports N d. Coast Pilot 1044: The dry-bulb temperature is 78°F and the wet-bulb temperature is 62°F. What is the relative humidity?
N a. 16% N b. 24% Y c. 39% N d. 79% 1073: Chart legends printed in capital letters show that the associated landmark is __________.
N a. inconspicuous N b. a radio transmitter Y c. conspicuous N d. a government facility or station 1187: Off Barnegat, NJ, with the wind coming out of the east, the wind-driven current will be flowing approximately __________.
N a. 016° N b. 106° Y c. 254° N d. 286° 1195: A position that is obtained by applying estimated current and wind to your vessel's course and speed is a(n) __________.
N a. dead reckoning position N b. fix Y c. estimated position N d. None of the above 1199: The Sailing Directions (Enroute) contain information on __________.
N a. well-charted inner dangers N b. port facilities Y c. coastal anchorages N d. offshore traffic separation schemes 1284: The Sailing Directions (Enroute) contain information on all of the following EXCEPT __________.
Y a. ocean currents N b. outer dangers to navigation N c. tidal currents N d. major port anchorages 1328: What will be the velocity of the tidal current in Bolivar Roads, Texas, at a point 0.5 mile north of Ft. Point, on 23 November 1983 at 0330 CST (ZD +6)?
Y a. Slack water N b. 0.8 kt N c. 1.2 kts N d. 3.4 kts 1334: The Illustration shows the symbols used on radio facsimile weather charts. The symbol indicated at letter "H" represents __________. (D042NG )
N a. ice N b. snow N c. rain Y d. hail 1338: Which type of cloud is indicated by the number 6? (D039NG )
N a. Altocumulus Y b. Stratocumulus N c. Altostratus N d. Cirrus 1347: What will be the velocity of the tidal current south of Doubling Point, ME, at 1357 EST (ZD +5) on 3 April 1983?
N a. 0.9 knot N b. 1.3 knots Y c. 2.0 knots N d. 2.6 knots 1391: When a light is first seen on the horizon it will disappear again if the height of eye is immediately lowered several feet. When the eye is raised to its former height the light will again be visible. This process is called __________.
N a. checking a light N b. raising a light N c. obscuring a light Y d. bobbing a light 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 1408: An occluded front is caused by a(n) __________.
N a. low pressure area N b. high pressure area N c. area of calm air Y d. cold front overtaking a warm front 1446: When compared to air temperature, which factor is most useful in predicting fog?
N a. Vapor pressure Y b. Dew point N c. Barometric pressure N d. Absolute humidity 1471: A mountain peak charted at 700 feet breaks the horizon, and your height of eye is 12 feet. What is your approximate distance off (choose closest answer)?
Y a. 34.7 nm N b. 40.3 nm N c. 55.3 nm N d. 61.6 nm 1484: You should plot your dead reckoning position at __________.
N a. every fix or running fix N b. every course change N c. every speed change Y d. All of the above are correct. 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 1739: Which condition indicates that you are in a hurricane's dangerous semicircle in the Northern hemisphere?
N a. A backing wind Y b. A veering wind N c. A norther N d. A strong, gusty wind 1756: Where would you expect to find climatological and meteorological tables for the Gulf Coast area?
N a. In the publication entitled Radio Aids to Navigation Y b. In the back of Coast Pilot #5 N c. In any Coast Pilot volume N d. Only at the National Weather Service office 1759: Which magnetic compass corrector(s) can be set while the vessel is on a heading of magnetic north or magnetic south?
N a. Quadrantal spheres Y b. Heeling magnets N c. Flinders bar N d. Fore-and-aft magnets 1892: The shoreline shown on nautical charts of areas affected by large tidal fluctuations is usually the line of mean __________.
N a. lower low water N b. low water N c. tide level Y d. high water 1900: A parallax correction is NOT applied to observations of the __________.
Y a. stars N b. Moon N c. Sun N d. Planets 1906: In the horizon system of coordinates what is equivalent to latitude on the Earth?
Y a. Altitude N b. Zenith N c. Declination N d. Zenith distance 1910: What sextant correction corrects the apparent altitude to the equivalent reading at the center of the Earth?
N a. Phase Y b. Parallax N c. Semidiameter N d. Augmentation 1984: When a dual purpose marking is used, the mariner following the Intracoastal Waterway should be guided by the __________.
N a. color of the aid N b. shape of the aid N c. color of the top band Y d. shape of the yellow mark 2028: Which stock number indicates an NGA (NIMA) chart designed for navigation and anchorage in a small waterway?
N a. WOAZC17 N b. LCORR5876 Y c. 15XHA15883 N d. PILOT55 2070: What is the relative bearing of an object on the port beam?
N a. 045° N b. 090° N c. 180° Y d. 270° 2082: You are holding position above Gallipolis Lock and Dam when you hear two long blasts of the horn from the lock. This indicates that you should __________.
Y a. enter the riverward lock N b. hold position until two more upbound tows have locked through N c. enter the landward lock N d. hold position until the lower gates are closed 2129: Diagram number D037NG represents a movable dam. If there is high water and the wickets are down so that there is an unobstructed navigable pass through the dam, what light(s) will be shown at B if the lock walls and piers are not awash?
N a. No lights Y b. Three red lights N c. Two red lights N d. One red light 2177: This diagram represents a movable dam. If there is high water and the wickets are down so that there is an unobstructed navigable pass through the dam, what light(s) will be shown at D if the lock walls and piers are not awash? (D037NG )
N a. One amber light N b. Three red lights N c. Two red lights Y d. One red light 2190: Clouds are classified according to their __________.
N a. size N b. moisture content Y c. altitude and how they were formed N d. location in a front 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 2290: Magnets in the binnacles of magnetic compasses are used to reduce the effect of __________.
Y a. deviation N b. variation N c. local attraction N d. All of the above 2300: When a magnetic compass is not in use for a prolonged period of time it should __________.
Y a. be shielded from direct sunlight N b. be locked into a constant heading N c. have any air bubbles replaced with nitrogen N d. have the compensating magnets removed 2300: When a magnetic compass is not in use for a prolonged period of time it should __________.
Y a. be shielded from direct sunlight N b. be locked into a constant heading N c. have any air bubbles replaced with nitrogen N d. have the compensating magnets removed 2301: The letter C in illustration D006NG represents the __________.
Y a. celestial horizon N b. geoidal horizon N c. visible horizon N d. sensible horizon 2422: The dimmest stars that could be reasonably used for navigational purposes are of what magnitude?
N a. First Y b. Third N c. Sixth N d. Tenth 2504: Under the IALA-A Buoyage System, when entering from seaward a lateral system buoy to be left to starboard may display which topmark shown? (D046NG )
N a. A N b. B Y c. C N d. D 2629: In both regions of the IALA buoyage system, which topmark is used on a special mark? (D022NG )
N a. A N b. B N c. C Y d. D 2741: A general chart could have a scale of __________.
Y a. 1:200,000 N b. 1:1,000,000 N c. 1:50,000 N d. not more than 1:25,000 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° 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