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.
26: Wind direction may be determined by observing all of the following EXCEPT __________.
N a. low clouds N b. waves N c. whitecaps Y d. swells 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 43: A buoy with a composite group-flashing light indicates a(n) __________.
N a. anchorage area N b. fish net area Y c. bifurcation N d. dredging area 47: The range of tide is the __________.
N a. distance the tide moves out from the shore N b. duration of time between high and low tide Y c. difference between the heights of high and low tide N d. maximum depth of the water at high tide 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 96: A weather forecast states that the wind will commence veering. In the Northern Hemisphere this indicates that the wind will __________.
Y a. shift in a clockwise manner N b. shift in a counterclockwise manner N c. continue blowing from the same direction N d. increase in velocity 220: At 0000 you fix your position and plot a new DR track line. At 0200 you again fix your position and it is 0.5 mile east of your DR. Which statement is TRUE?
N a. The current is westerly at 0.5 knot. N b. You must increase speed to compensate for the current. N c. The current cannot be determined. Y d. The drift is 0.25 knot. 289: A position obtained by crossing lines of position taken at different times and advanced to a common time is a(n) __________.
Y a. running fix N b. dead-reckoning position N c. fix N d. estimated position 341: Buoys which only mark the left or right side of the channel will never exhibit a light with which characteristic?
N a. Flashing N b. Quick flashing Y c. Composite group flashing N d. Equal interval (isophase) 371: Which buoy may be odd numbered?
N a. Mid-channel buoy N b. Unlighted nun buoy Y c. Lighted green buoy N d. All of the above 372: You would find the variation on a polyconic projection chart __________.
Y a. on the compass rose N b. on the mileage scale N c. written on the chart title N d. at each line of longitude 422: If you are sailing from the East Coast of the United States to the Caribbean Sea, which publication would contain information on weather, currents, and storms?
N a. Sailing Charts of the Caribbean Sea Y b. Pilot Charts of the North Atlantic N c. Light Lists, Atlantic and Gulf Coast N d. Tidal Current Tables 483: Coral atolls, or a chain of islands at right angles to the radar beam, may show as a long line rather than as individual targets due to __________.
Y a. the effects of beam width N b. limitations on range resolution N c. the pulse length of the radar N d. the multiple-target resolution factor 485: A phase correction is applied to observations of __________.
N a. the Sun N b. stars Y c. planets N d. All of the above 544: The instrument most commonly used to gather the data for determining the relative humidity is the __________.
N a. hydrometer Y b. psychrometer N c. barometer N d. anemometer 578: At about GMT 1436, on 3 December 1981, the lower limb of the Moon is observed with a sextant having an index error of 2.5' on the arc. The height of eye is 32 feet. The sextant altitude (hs) is 3°38.8'. What is the observed altitude?
N a. Ho 4°18.6' Y b. Ho 4°29.1' N c. Ho 4°36.3' N d. Ho 4°42.2' 624: When using a mechanical (windup type) marine chronometer, how often should it be reset?
Y a. Only when it is overhauled N b. Whenever the chronometer error exceeds approximately four minutes N c. At the start of each voyage N d. If the chronometer rate changes from gaining to losing or vice versa 716: Standard atmospheric pressure in inches of mercury is __________.
N a. 30.00 N b. 28.92 Y c. 29.92 N d. 29.00 768: The wind velocity is higher in the dangerous semicircle of a tropical cyclone because of the __________.
Y a. wind circulation and forward motion of the storm N b. extension of the low pressure ridge N c. recurvature effect N d. direction of circulation and pressure gradient 839: When using a radar in an unstabilized mode, fixes are determined most easily from __________.
Y a. ranges N b. center bearings N c. tangent bearings N d. objects that are close aboard 942: Light Lists for coastal waters are __________.
N a. published every year and require no corrections N b. published every second year and must be corrected N c. published every five years and require no correction Y d. accurate thru NM number on title page and must be corrected 975: The change in the length of the day becomes greater as latitude increases because of the __________.
N a. path of the ecliptic relative to the equator N b. decreasing distance between meridians N c. changing distance between the Earth and the Sun Y d. increased obliquity of the Sun's diurnal circle 995: What is the equivalent of 83°29.6' in time units?
N a. 5h 47m 34.8s N b. 5h 18m 22.7s N c. 5h 01m 42.3s Y d. 5h 33m 58.4s 1018: An aneroid barometer reading should be corrected for differences in __________.
Y a. elevation N b. temperature N c. wind speed N d. latitude 1229: The initial great circle course angle between LAT 23°00'S, LONG 42°00'W and LAT 34°00'S, LONG 18°00'E is 063.8°. What is the true course?
N a. 063.8°T Y b. 116.2°T N c. 243.8°T N d. 296.2°T 1232: Entering from seaward, triangular-shaped daymarks are used to mark __________.
Y a. the starboard side of the channel N b. the centerline of the channel N c. an obstruction where the preferred channel is to starboard N d. special purpose areas 1336: On the approach of a warm front, barometric pressure usually __________.
Y a. falls N b. is steady N c. is uncertain N d. rises 1337: What will be the time of maximum flood current at Sagamore Bridge on the Cape Cod Canal during the morning of 6 December 1983 (ZD +5)?
Y a. 0708 N b. 0712 N c. 0716 N d. 1020 1358: Despite weather predictions for continued good weather, a prudent mariner should be alert for all of the following, EXCEPT a sudden __________.
N a. drop in barometric pressure Y b. drop in temperature N c. wind shift N d. squall line 1475: Which type of cloud is the classic "thunderhead"?
Y a. Cumulonimbus N b. Stratus N c. Cirrus N d. Altostratus 1551: In order to get the maximum benefit from the Gulf Stream, on a voyage between Houston and Philadelphia, you should navigate __________.
Y a. about 75 miles east of Ormond Beach, FL N b. close inshore between Jupiter Inlet and Fowey Rocks, FL N c. along the 50-fathom curve while off the east coast of Florida N d. about 10 miles east of Cape Canaveral, FL 1671: Cirrus clouds are composed primarily of __________.
Y a. ice crystals N b. water droplets N c. snow crystals N d. nitrogen 1677: The position labeled "E" was plotted because __________. (D051NG )
N a. a dead reckoning position is plotted within a half-hour of each course change Y b. a dead reckoning position is plotted for each speed change N c. the position is a running fix 1125 N d. the vessel's position was fixed at 1145 1690: In regions near the poles, the winds are generally described as __________.
N a. westerlies Y b. easterlies N c. northerlies N d. southerlies 1761: Chart legends which indicate a conspicuous landmark are printed in __________.
N a. italics N b. underlined letters Y c. capital letters N d. boldfaced print 1769: Under the numbering system used by NGA (NIMA), a three digit number may be used for __________.
Y a. a small scale chart depicting a major portion of an ocean basin or a position plotting sheet N b. non-navigational materials such as radar plotting sheets N c. products issued periodically such as the Notice to Mariners N d. large scale charts of areas that are infrequently used for navigation such as the headwaters of rivers 1852: When plotting a circle of equal altitude for a high altitude sight, the radius of the circle is determined by the formula __________.
Y a. 90° - Ho N b. 180° - GHA N c. GHA - LHA N d. z - d 1858: A white buoy with an orange cross within a diamond marked on it indicates __________.
N a. danger Y b. vessels are excluded from the area N c. an anchorage area N d. operating restrictions are in effect 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 1928: "Rotation" is the __________.
N a. wobbling of the Earth about its axis N b. motion of bodies in the solar system relative to the stars N c. motion of a celestial body in its orbit Y d. spinning of a celestial body about its axis 1949: "Revolution" is the __________.
N a. wobbling of the Earth about its axis N b. motion of bodies in the solar system relative to the stars Y c. motion of a celestial body in its orbit N d. spinning of a celestial body about its axis 2062: The Illustration represents a fixed C of E lock and dam. What navigational light(s) is(are) exhibited at the position indicated by the letter F in the illustration? (D038NG )
Y a. One red light N b. Two red lights N c. Two green lights N d. Three green lights 2244: Capella is found in what constellation?
N a. Gemini Y b. Auriga N c. Libra N d. Crab 2330: You are heading in a northerly direction when you come across an easterly current. Your vessel will __________.
Y a. be pushed to starboard N b. be pushed to port N c. decrease in engine speed N d. remain on course 2340: What is a "Special Warning"?
N a. An urgent message concerning a vessel in distress N b. A weather advisory about unusual meteorological or oceanographic phenomena hazardous to vessels Y c. A broadcast disseminating an official government proclamation affecting shipping N d. A radio navigational warning concerning a particularly hazardous condition affecting navigation 2341: Which statement concerning illustration D010NG is correct? (Soundings and heights are in meters)
N a. Maury Lightship swings about her anchor on a circle with a 21-meter diameter. N b. The position of the lightship is indicated by the center of the star on the symbol's mast. Y c. The sunken wreck southwest of Beito Island shows the hull or superstructure above the sounding datum. N d. There is a 12-meter deep hole inside the 5-meter curve just west of Beito Island. 2386: The path that the Sun appears to take among the stars is the __________.
N a. zodiac N b. Tropic of Cancer in the Northern Hemisphere Y c. ecliptic N d. line of apsides 2482: When a vessel changes course from one cardinal heading to another cardinal heading while adjusting the compass, which action should be taken?
N a. The course change should be made rapidly to prevent transient induced magnetism while passing the intercardinal headings. Y b. After the new heading is reached, the vessel should steam on that course for at least two minutes before the adjustment. N c. During the course change, you should gently tap the compass to remove any error caused by friction on the pivot bearing. N d. After steadying on the new heading, the compass card should be slewed by a magnet and allowed to oscillate freely to remove any gaussin error. 2612: The dividing meridian between zone descriptions -7 and -8 is __________.
Y a. 112°30'E N b. 118°30'E N c. 120°00'E N d. 116°30'W 2612: The dividing meridian between zone descriptions -7 and -8 is __________.
Y a. 112°30'E N b. 118°30'E N c. 120°00'E N d. 116°30'W 2640: In the celestial equator system of coordinates what is the equivalent to the meridians of the Earth system of coordinates?
N a. Horizon Y b. Hour circles N c. Vertical circles N d. Parallel of declination 2644: The sidereal day begins __________.
N a. when the sun is over the first point of Aries N b. when the first point of Aries is over 180° longitude Y c. when the first point of Aries is over the upper branch of the reference meridian N d. at 0000 on 1 January (Sidereal Date) 2776: For a well made and well maintained sextant, the maximum value of which correction is usually so small that it can be ignored?
N a. Personal correction Y b. Instrument correction N c. Phase N d. Dip correction 2851: You determine your vessel's position by taking a range and bearing to a buoy. Your position will be plotted as a(n) __________.
N a. dead-reckoning position Y b. estimated position N c. running fix N d. fix 2886: On mid-ocean waters, the height of a wind-generated wave is not affected by the __________.
Y a. water depth exceeding 100 feet N b. fetch N c. wind's velocity N d. duration of the wind 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 3018: You take a bearing of 356° of a lighthouse. Which bearing of another object would give the best fix?
N a. 013° N b. 178° Y c. 256° N d. 342° 3031: Which symbol would indicate a large automated navigational buoy, such as those that have replaced some lightships? (D015NG )
N a. A Y b. B N c. C N d. D 3109: While underway, a vessel over 100,000 gross tons with an automatic identification systems (AIS) is expected to broadcast all of the following information every 1 to 10 seconds EXCEPT __________.
N a. rate of turn Y b. name of vessel N c. navigational status N d. ship's heading 3109: While underway, a vessel over 100,000 gross tons with an automatic identification systems (AIS) is expected to broadcast all of the following information every 1 to 10 seconds EXCEPT __________.
N a. rate of turn Y b. name of vessel N c. navigational status N d. ship's heading