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.
6: Wind velocity varies __________.
N a. directly with the temperature of the air mass Y b. directly with the pressure gradient N c. inversely with the barometric pressure N d. inversely with the absolute humidity 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. 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 138: The path that a vessel is expected to follow, represented on a chart by a line drawn from the point of departure to the point of arrival, is the __________.
N a. DR plot Y b. track line N c. heading N d. estimated course 157: Tropic tides are caused by the __________.
Y a. Moon being at its maximum declination N b. Moon crossing the equator N c. Sun and Moon both being near 0° declination N d. Moon being at perigee 196: The area of strong westerly winds occurring between 40°S and 60°S latitude is called the __________.
N a. polar easterlies N b. prevailing westerlies Y c. roaring forties N d. jet streams 206: The winds you would expect to encounter in the North Atlantic between latitudes 5° and 30° are known as the __________.
N a. doldrums N b. westerlies Y c. trades N d. easterlies 232: Which statement concerning the chartlet is TRUE? (Soundings and heights are in meters) (D010NG )
N a. Maury lightship is visible for 17 miles. N b. The bottom to the south-southeast of the lightship is soft coral. N c. There is a 12-meter deep west of Beito Island and inside the 5-meter line. Y d. There is a dangerous eddy southeast of Beito Island. 259: The Illustration shows the symbols used on radio facsimile weather charts. The symbol indicated at letter "Q" represents a __________. (D042NG )
N a. convergence zone N b. squall line Y c. convergence line N d. weather boundary 260: The National Ocean Service publishes the __________.
N a. Light Lists Y b. Coast Pilots N c. pilot charts N d. Sailing Directions 276: The region of high pressure extending around the Earth at about 35°N latitude is called the __________.
N a. prevailing westerlies Y b. horse latitudes N c. troposphere N d. doldrums 324: Index error of a sextant is primarily caused by __________.
N a. improperly correcting the other errors in a sextant N b. the horizon glass not being parallel to the horizon mirror Y c. the horizon glass not being parallel to the index mirror N d. human error in taking a celestial observation 367: What will be the time after 0800 EST (ZD +5) that the height of the tide at South Freeport, ME, will be 6.0 feet (1.8 meters) on 7 November 1983?
N a. 0936 N b. 0942 Y c. 0951 N d. 1001 445: The values of the Greenwich hour angle and declination, tabulated in all almanacs, are for the __________.
N a. upper limb of a celestial body N b. lower limb of a celestial body Y c. centers of the various celestial bodies N d. lower limb of the Sun and Moon; center of the stars and planets 448: Mean high water is the reference datum used to measure __________.
N a. soundings on the east coast of the United States N b. soundings in European waters Y c. heights of topographical features in the United States N d. both heights and soundings worldwide 448: Mean high water is the reference datum used to measure __________.
N a. soundings on the east coast of the United States N b. soundings in European waters Y c. heights of topographical features in the United States N d. both heights and soundings worldwide 796: Cyclones tend to move __________.
N a. perpendicular to the isobars in their warm sectors Y b. parallel to the isobars in their warm sectors N c. parallel to the line of the cold front N d. perpendicular to the line of the cold front 816: Cyclones that have warm sectors usually move __________.
N a. westerly Y b. parallel to the isobars in the warm sector N c. toward the nearest high pressure area N d. faster than the accompanying cold front 845: During one synodic rotation, a body makes one complete turn relative to the __________.
N a. Earth Y b. Sun N c. stars N d. vernal equinox 924: The form of cloud often known as "mackerel sky" which is generally associated with fair weather is __________.
N a. nimbostratus N b. stratus Y c. cirrocumulus N d. cumulonimbus 932: To find the specific phase characteristic of a lighthouse on a sound of the United States you would use the __________.
N a. American Practical Navigator Y b. Light List N c. Nautical Chart Catalog N d. U.S. Coast Pilot 932: To find the specific phase characteristic of a lighthouse on a sound of the United States you would use the __________.
N a. American Practical Navigator Y b. Light List N c. Nautical Chart Catalog N d. U.S. Coast Pilot 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 1035: The approximate positions of the stars are based on sidereal time, which is based upon rotation of the Earth relative to __________.
N a. winter solstice N b. autumnal equinox N c. summer solstice Y d. vernal equinox 1091: The cardinal mark topmark shown in illustration D024NG represents which quadrant? (D024NG )
N a. Northern N b. Eastern N c. Southern Y d. Western 1099: You are enroute to assist vessel A. Vessel A is underway at 6 knots on course 133°T, and bears 343°T at 92 miles from you. What is the course to steer at 9 knots to intercept vessel A?
N a. 356° Y b. 003° N c. 022° N d. 038° 1104: Which condition(s) is(are) necessary for the formation of dew?
N a. Clear skies N b. Calm air N c. Earth's surface cooler than the dew point of the air Y d. All of the above 1203: If the compass heading and the magnetic heading are the same then __________.
N a. the deviation has been offset by the variation N b. there is something wrong with the compass N c. the compass is being influenced by nearby metals Y d. there is no deviation on that heading 1252: Port side daymarks may be __________.
Y a. numbered N b. octagonal N c. black and white N d. of any shape 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 1292: A triangular daymark would be colored __________.
Y a. red N b. red and white N c. green N d. green and white 1320: You are enroute to Savannah, GA, from Recife, Brazil. There is a strong N'ly wind blowing. As you cross the axis of the Gulf Stream you would expect to encounter __________.
Y a. steeper waves, closer together N b. smoother seas and warmer water N c. cirrus clouds N d. long swells 1348: Vessel required to have an Automatic Radar Plotting Aid must have a device to indicate the __________.
Y a. speed of the vessel over the ground or through the water N b. distance to the next port N c. time of the next navigational satellite pass N d. None of the above 1381: Geographic range is the maximum distance at which a light may be seen under __________.
N a. existing visibility conditions, limited only by the curvature of the Earth Y b. perfect visibility conditions, limited only by the curvature of the Earth N c. existing visibility conditions, limited only by the intensity of the light N d. perfect visibility conditions, limited only by interference from background lighting 1412: The distance between the surface of the water and the tidal datum is the __________.
N a. actual water depth N b. range of tide N c. charted depth Y d. height of tide 1420: the position labeled "E" was plotted because __________. (D051NG )
N a. the vessel's position was fixed at 1145 N b. a dead reckoning position is plotted within a half-hour of each course change N c. the position is a running fix Y d. a dead reckoning position is plotted for each speed change 1466: Advection fog is most commonly caused by __________.
N a. air being warmed above the dew point N b. saturation of cold air by rain N c. a rapid cooling of the air near the surface of the Earth at night Y d. warm moist air being blown over a colder surface 1491: You are on course 138°T. To check the latitude of your vessel you should observe a celestial body on which bearing?
N a. 138° N b. 270° N c. 318° Y d. 000° 1497: When drawing a weather map and an isobar crosses a front, the isobar is drawn __________.
N a. perpendicular to the front Y b. kinked and pointing away from the low N c. kinked and pointing towards the low N d. kinked and pointing towards the high for a warm front only 1501: What is the distance from the bottom of a wave trough to the top of a wave crest?
N a. Wave length Y b. Wave height N c. Wave breadth N d. Wave depth 1538: The winds of the "roaring forties" are strongest near __________.
N a. 40°N N b. 50°N N c. 40°S Y d. 50°S 1561: You are sailing south on the Intracoastal Waterway (ICW) when you sight a red nun buoy with a yellow square painted on it. Which statement is TRUE?
N a. The buoy is off station and should be ignored as a navigational mark. N b. The waterway in that area has shoaled and the available depth of water is less than the project depth. N c. ICW traffic should not proceed beyond the buoy unless the crossing waterway is clear of all traffic. Y d. You should leave the buoy to port. 1624: A psychrometer has two thermometers that provide dry bulb and wet bulb temperatures. By comparing these two temperature readings with a set of tables you can determine the __________.
N a. atmospheric pressure N b. wind speed Y c. relative humidity and dew point N d. wind chill factor 1699: In the Northern Hemisphere, when the center of a high pressure system is due east of your position, you can expect winds from the __________.
N a. south to west Y b. south to east N c. north to west N d. north to east 1749: If the current and wind are in opposite directions, the sea surface represents __________.
N a. a greatly reduced wind speed Y b. a higher wind speed than what really exists N c. a lower wind speed than what really exists N d. more turbulent winds 1751: A tsunami is caused by a(n) __________.
N a. tidal wave N b. storm surge caused by a hurricane or tropical storm Y c. earthquake on the ocean's floor N d. tornado 1753: On a weather map, a large letter "H" means __________.
Y a. a high pressure area with cool, dry air, and fair weather N b. a high pressure area with warm, moist air, and inclement weather N c. horse latitudes, with rough seas and strong winds N d. a heavy squall line near the "H" 1778: Illustration D037NG represents a movable dam. If the wickets are down and there are open weirs due to high water, what light(s) will be shown at A if the lock walls and piers are not awash? (D037NG )
Y a. One red light N b. Two red lights N c. Three red lights N d. One green light 1818: In order to utilize the capacity of a lock to its maximum, pleasure craft are locked through with all of the following EXCEPT __________.
N a. coal barges Y b. oil barges N c. sand barges N d. cement barges 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 2119: Which stock number indicates an NGA (NIMA) chart designed for fixing positions at sea and DR plotting while on a long voyage?
Y a. WOAGN520 N b. PILOT16 N c. 16BCO16212 N d. WOPZC5245 2294: What celestial body may sometimes be observed in daylight?
N a. New Moon N b. Saturn N c. Sirius Y d. Venus 2462: Under ideal viewing conditions, the dimmest star that can be seen with the unaided eye is of what magnitude?
N a. First N b. Third N c. Fourth Y d. Sixth 2606: The measurement of local time is based on the passage of the Sun over the __________.
N a. upper branch of the observer's meridian Y b. lower branch of the observer's meridian N c. upper branch of the Greenwich meridian N d. lower branch of the Greenwich meridian 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 2642: Local sidereal time is equal to the __________.
N a. GHA of Aries minus 180° N b. SHA of Aries Y c. LHA of Aries N d. right ascension of Aries plus 180° 2892: The Light List indicates that a dayboard is a type NB. You should __________.
N a. see a black triangle N b. look for another daymark forming a range Y c. expect a daymark of no lateral significance N d. check to enter the correct channel at the junction daymark 2984: What two shapes shown are used to indicate a preferred channel? (D045NG )
N a. A and B N b. B and C N c. C and D Y d. A and D 3033: A navigator fixing a vessel's position by radar __________.
Y a. can use radar information from one object to fix the position N b. should never use radar bearings N c. should only use radar bearings when the range exceeds the distance to the horizon N d. must use information from targets forward of the beam 3091: Which of the following must an ECDIS system be able to perform?
N a. Conversion of "graphical coordinates" to "display coordinates" N b. Transformation of local datum to WGS-'84 datum N c. Calculation of true azimuth and distance between two geographical points Y d. All of the above