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.
23: If Loran-C signals become unsynchronized, the receiver operator is warned because __________.
Y a. signals begin to blink N b. signals begin to shift N c. stations discontinue transmission N d. stations transmit grass 25: You are in LONG 144°E. The date is 6 February, and the zone time is 0800. The Greenwich date and time are __________.
Y a. 2200, 5 February N b. 2300, 5 February N c. 1700, 6 February N d. 1800, 6 February 40: The predicted time that the flood begins at the entrance to Delaware Bay is 1526. You are anchored off Chestnut St. in Philadelphia. If you get underway bound for sea at 1600 and turn for 8 knots, at what point will you lose the ebb current?
N a. Billingsport N b. Marcus Hook Y c. Mile 63 N d. Mile 52 70: The station located at "A" is the __________. (D001NG )
N a. on station N b. off station Y c. master station N d. secondary station 188: Off Barnegat, NJ, with the wind coming out of the east, the wind-driven current will be flowing approximately __________.
N a. 286° Y b. 254° N c. 106° N d. 016° 192: The description "Racon" beside an illustration on a chart would mean a __________.
N a. radar conspicuous beacon N b. circular radio beacon Y c. radar transponder beacon N d. radar calibration beacon 219: The predicted time that the flood begins at the entrance to Delaware Bay is 1526. You are anchored off Chestnut St. in Philadelphia. If you get underway bound for sea at 1300 and turn for 13 knots, at what point will you lose the flood current?
N a. Mile 52 N b. New Castle N c. Marcus Hook Y d. Billingsport 224: A sextant having an index error that is "off the arc" has a __________.
Y a. positive correction N b. dip error N c. negative correction N d. semidiameter error 230: If the LORAN-C ground wave does NOT extend out as far as the skywave skip distance, there will be a skip zone in which __________.
Y a. no LORAN-C signal is received N b. only ground waves are received N c. only skywaves are received N d. both ground waves and skywaves are received 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 511: A survey (special purpose mark) buoy __________.
N a. must be lighted N b. may have a flashing red light N c. may have a fixed white light Y d. None of the above 521: Which sextant has an index error of 2'10" on the arc? (D050NG )
N a. A N b. B N c. C Y d. D 559: A great circle crosses the equator at 162°E. It will also cross the equator at what other longitude?
N a. 62°E N b. 126°W N c. 162°W Y d. 18°W 608: In which voyage, between two points, is the rhumb line distance NOT approximately the same as the great circle distance?
N a. The two points are in low latitudes in the same hemisphere. Y b. The two points are in high latitudes in the same hemisphere. N c. The two points are near the equator, but in different hemispheres. N d. One point is near the equator, one point is in a high latitude, and both are near the 180th meridian. 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 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 761: Under the IALA Buoyage Systems, a safe water mark may NOT __________.
N a. be spherical N b. display a white light N c. be lettered Y d. show a quick flashing light 789: The dangerous semicircle of a hurricane in the Northern Hemisphere is that area of the storm __________.
Y a. to the right of the storm's track N b. measured from true north clockwise to 180°T N c. measured from true north counterclockwise to 180°T N d. between the ship's heading and the bearing to the eye 1046: The probability of a sudden wind may be foretold by __________.
N a. a partly cloudy sky N b. an overcast sky Y c. a fast approaching line of dark clouds N d. the formation of cumulus clouds in the sky 1086: When crossing a front isobars tend to __________.
Y a. change from smooth curves within the air mass to sharp bends at the front N b. change from sharp bends within the air mass to smooth curves at the front N c. pass smoothly across the front with no change N d. become closer together at the front and pass through in straight lines 1112: Considering the general circulation of the atmosphere, the wind system between latitudes 30°N and 60°N is commonly called the __________.
Y a. prevailing westerlies N b. horse latitudes N c. trade winds N d. subpolar low pressure belts 1173: When adjusting a magnetic compass for error, a deviation table should be made __________.
N a. before correcting for any deviation N b. after correcting for variation Y c. after adjusting the fore-and-aft and athwartships permanent magnets N d. before the quadrantal correctors are placed on the compass 1185: An orange and white buoy with a rectangle on it displays __________.
N a. directions N b. distances N c. locations Y d. All of the above 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° 1266: A line of clouds, sharp changes in wind direction, and squalls are most frequently associated with a(n) __________.
N a. occluded front N b. warm front Y c. cold front N d. warm sector 1272: What are the colors of a mid-channel daymark?
N a. Black and red Y b. Red and white N c. Green and red N d. Green and white 1290: In addition to the National Weather Service, what agency provides plain-language radio weather advisories for the coastal waters of the United States?
N a. National Geospatial-Intelligence Agency N b. U.S. Hydrological Survey Y c. U.S. Coast Guard N d. American Meteorological Service 1295: The best estimate of the wind direction at sea level can be obtained from observing the direction of the __________.
N a. cloud movement N b. vessel heading Y c. waves N d. swells 1340: The annual change in variation for an area can be found in __________.
N a. the handbook for Magnetic Compass Adjustment, Pub 226 Y b. the center of the compass rose on a chart of the area N c. the compass deviation table N d. Variation does not change. 1356: The first indications a mariner will have of the approach of a warm front will be __________.
N a. large cumulonimbus (thunderclouds) building up Y b. high cirrus clouds gradually changing to cirrostratus and then to altostratus N c. fog caused by the warm air passing over the cooler water N d. low dark clouds accompanied by intermittent rain 1383: The spin axis of a gyroscope tends to remain fixed in space in the direction in which it is started. How does this gyroscope become north seeking so that it can be used as a compass?
Y a. By mechanically or electrically applying forces to precess the gyroscope N b. By starting the compass with the spin axis in a north/south position N c. By taking advantage of the property of gyroscopic inertia N d. The rotation of the Earth (Earth rate) automatically aligns the gyroscope with north, except for speed errors 1470: The Illustration shows the symbols used on radio facsimile weather charts. Which symbol indicates a hurricane? (D042NG )
N a. M N b. I N c. L Y d. K 1511: When within 300 miles of a named tropical storm or hurricane, it is standard practice to send weather reports every __________.
N a. 8 hours N b. 6 hours Y c. 3 hours N d. hour 1545: The change in the length of day becomes greater as latitude increases because of the __________.
N a. inclination of the diurnal circle to the equator N b. decreasing distance between the terrestrial meridians Y c. increased obliquity of the celestial sphere N d. changing distance between the earth and the sun 1640: Clouds with the prefix "nimbo" in their name __________.
N a. are sheet or layer clouds N b. have undergone great vertical development N c. are middle or high altitude clouds Y d. are rain clouds 1694: In the Southern Hemisphere the wind circulation in a high pressure system rotates __________.
N a. clockwise and inward N b. clockwise and outward Y c. counterclockwise and outward N d. counterclockwise and inward 1752: What is the major limitation in using the Sight Reduction Tables for Air Navigation Volume I (Pub. No. 249) for star sights?
N a. More accuracy is needed for celestial observations on board ship than what is tabulated. N b. Sights must be made at even time increments to benefit from the tables. Y c. Only certain stars are included and sights must be limited to those stars. N d. Only first magnitude stars are tabulated. 1791: The accuracy of an azimuth circle can be checked by __________.
N a. sighting a terrestrial range in line and comparing the observed bearing against the charted bearing N b. aligning the relative bearing markings so that 000° is on the lubber's line and the line of sight passes over the center of the compass N c. ensuring that the alignment marks on the inner face of the circle are in line with those on the repeater on relative bearings of 000° and 090° Y d. comparing observed azimuths at different altitudes with computed values at the times of observation to see if the difference is constant 1848: The buoy symbol printed on your chart is leaning to the northeast. This indicates __________.
N a. you should stay to the north or east of the buoy N b. you should stay to the west or south of the buoy N c. the buoy is a major lighted buoy Y d. nothing special for navigational purposes 1978: A celestial body's complete orbit around another body is __________.
N a. a rotation Y b. a revolution N c. space motion N d. nutation 2085: Information about major breakdowns, repairs, or other emergency operations with regard to weirs and (or) wicket dams, on the western rivers, may be obtained from the __________.
Y a. Broadcast Notice to Mariners N b. Light List Vol. V N c. U.S. Coast Pilot N d. Sailing Directions 2142: Which lights would you see on the Illinois waterway when any wickets of the dam or bear traps are open, or partially open, which may cause a set in the current conditions in the upper lock approach?
N a. Green over amber (yellow) Y b. Red over amber (yellow) N c. Red over blue N d. Green over red 2145: What lights would you see on the Illinois water way when any wickets of the dam or bear traps are open, or partially open, which may cause a set in the current conditions in the upper lock approach?
N a. Green over red N b. Red over blue N c. Green over amber (yellow) Y d. Red over amber (yellow) 2146: What lights would you see on the Illinois water way when any wickets of the dam or bear traps are open, or partially open, which may cause a set in the current conditions in the upper lock approach?
N a. Green over red N b. Red over blue Y c. Red over amber (yellow) N d. None of the above 2174: By convention, the Earth's north magnetic pole is colored __________.
N a. red N b. white Y c. blue N d. black 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 2237: A lighted buoy to be left to starboard, when entering a U.S. port from seaward, shall have a __________.
N a. light characteristic of Morse (A) N b. white light N c. green light Y d. red light 2252: The vertical angle between the horizontal and the magnetic line of force is the __________.
N a. elevation N b. magnetic angle N c. vertical angle Y d. dip 2272: Mars will not be visible __________.
N a. at elongation angles near 180° N b. from quadrature to opposition Y c. at conjunction N d. at opposition 2372: In the North Sea area, you sight a buoy showing a quick white light showing 6 flashes followed by one long flash at 15 second intervals. Which of the four topmarks illustrated in diagram D031NG would be fitted to this buoy? (D031NG )
N a. A N b. B Y c. C N d. D 2646: During daylight savings time the meridian used for determining the time is located farther __________.
Y a. east N b. west N c. east in west longitude and west in east longitude N d. west in west longitude and east in east longitude 2726: A daymark used as a special mark is indicated by which letter in the diagram? (D045NG )
N a. A Y b. B N c. C N d. D 2752: A daymark used to indicate the safe water in a channel will have which of the shapes shown? (D045NG )
N a. A N b. B Y c. C N d. D 2870: Steam fog is most likely to occur on the Mississippi and Ohio Rivers in __________.
N a. spring, around late evening N b. spring, around early evening Y c. fall, around early morning N d. fall, around midday 2966: You take a bearing of 264° of a lighthouse. Which bearing of another object would give the best fix?
N a. 291° N b. 059° Y c. 182° N d. 239° 3011: The survey information upon which a chart is based is found __________.
N a. at the top center of the next line Y b. near the chart title N c. at the lower left corner N d. at any convenient location 3024: Given are the courses and speeds of 4 vessels. The navigator of which vessel would be required to know the actual time of meridian transit in order to take an accurate observation at LAN ?
N a. C 018°T, Sp 6 knots N b. C 079°T, Sp 24 knots N c. C 101°T, Sp 7 knots Y d. C 349°T, Sp 25 knots 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 3106: What does an automatic identification system (AIS) transponder use to transmit and receive information broadcasts?
N a. 3000 Mhz and 9200 Mhz N b. 2182 Khz and 2187.5 Khz Y c. 156.525 Mhz, 161.975 Mhz and 162.025 Mhz N d. 1575.42 Mhz and 1227.6 Mhz 3117: 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. IMO number N c. Type of vessel N d. Vessel's maximum displacement