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.
7: The period at high or low tide during which there is no change in the height of the water is called the __________.
N a. range of the tide N b. plane of the tide Y c. stand of the tide N d. reversing of the tide 14: You have replaced the chart paper in the course recorder. What is NOT required to ensure that a correct trace is recorded?
Y a. Test the electrical gain to the thermograph pens N b. Set the zone pen on the correct quadrant N c. Line the course pen up on the exact heading of the ship N d. Adjust the chart paper to indicate the correct time 105: If the GMT is 1500, the time at 75°E longitude is __________.
N a. 1000 N b. 1500 N c. 1700 Y d. 2000 126: A katabatic wind blows __________.
N a. up an incline due to surface heating N b. in a circular pattern Y c. down an incline due to cooling of the air N d. horizontally between a high and a low pressure area 144: In modern fathometers the sonic or ultrasonic sound waves are produced electrically by means of a(n) __________.
N a. transmitter Y b. transducer N c. transceiver N d. amplifier 148: When possible, a DR plot should always be started from where?
N a. Any position Y b. A known position N c. An assumed position N d. None of the above 164: The part of a sextant mounted directly over the pivot of the index arm is the __________.
Y a. index mirror N b. horizon glass N c. micrometer drum N d. telescope 330: You are taking bearings on two known objects ashore. The BEST fix is obtained when the angle between the lines of position is __________.
Y a. 90° N b. 30° N c. 45° N d. 60° 337: To predict the actual depth of water using the Tide Tables, the number obtained from the Tide Tables is __________.
N a. the actual depth Y b. added to or subtracted from the charted depth N c. multiplied by the charted depth N d. divided by the charted depth 349: The direction of the southeast trade winds is a result of the __________.
N a. equatorial current N b. humidity Y c. rotation of the earth N d. change of seasons 378: A navigator fixing a vessel's position by radar __________.
N a. should never use radar bearings Y b. can use radar information from one object to fix the position 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 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 554: A sling psychrometer is a(n) __________.
N a. type of cargo gear N b. instrument used in celestial navigation Y c. instrument used to measure relative humidity N d. instrument used to measure specific gravity 565: The letter B as shown represents the __________. (D006NG )
Y a. geoidal horizon N b. celestial horizon N c. visible horizon N d. sensible horizon 602: Between the equator and the 46th parallel of latitude, there are 3099 meridional parts. How many degrees of equatorial longitude does 3099 meridional parts represent?
N a. 35°52'45" Y b. 51°39'00" N c. 74°21'11" N d. 82°36'12" 603: What is the approximate wave length of an X Band Radar operating on a frequency of approximately 9500 MHz?
Y a. 3 cm N b. 10 cm N c. 30 cm N d. 100 cm 632: You must construct a Mercator projection for an area bounded by latitudes 40° - 47°N and longitudes 176°E to 176°W on a paper 28 X 36 inches. Allow a neat line of one inch. What will be the separation between meridians?
N a. 3.190 inches Y b. 3.249 inches N c. 3.529 inches N d. 3.714 inches 650: What classification of tropical cyclone would have closed isobars, counter clockwise rotary circulation, and sustained winds between 34 and 63 knots?
N a. A tropical disturbance N b. A tropical depression Y c. A tropical storm N d. A hurricane 656: In the Northern Hemisphere you are caught in the dangerous semicircle with plenty of sea room available. The best course of action is to bring the wind on the __________.
Y a. starboard bow and make as much headway as possible N b. starboard quarter, and make as much headway as possible N c. port quarter, and make as much headway as possible N d. port bow, and make as much headway as possible 687: The drift and set of tidal, river, and ocean currents refer to the __________.
N a. position and area of the current Y b. speed and direction toward which the current flows N c. type and characteristic of the current's flow N d. None of the above 702: Which publication contains information on navigation regulations, landmarks, channels, anchorages, tides, currents, and clearances of bridges for Chesapeake Bay?
Y a. Coast Pilot N b. Light List N c. Sailing Directions N d. Pilot Charts 708: Which statement about Radio Navigational Warning Broadcasts is TRUE?
N a. Radio navigational warnings are valid for 10 days, unless cancelled earlier. N b. NAVAREA warnings cover coastal areas only, while HYDROLANTS or HYDROPACS cover entire ocean areas. Y c. Radio navigational warnings issued by NGA (NIMA) are published in the Daily Memorandum and the Notice to Mariners. N d. HYDROLANTS and HYDROPACS cover the same geographical areas as NAVAREA warnings, but are for the use of military vessels only. 712: Information about the pilotage available at Miami harbor may best be obtained from which publication?
N a. World Port Index N b. Sailing Directions N c. Pilot Chart Y d. United States Coast Pilot 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 801: You are entering an African port and see ahead of you a red can-shaped buoy. What action should you take?
Y a. Alter course to leave the buoy to port N b. Alter course to leave the buoy to starboard N c. Pass the buoy close aboard on either side N d. Pass the buoy well clear on either side 938: If within 500 yards (460m) of a Northern Right Whale you are lawfully obligated to __________.
N a. turn away from the whale and leave at full speed Y b. turn away from the whale and leave at slow speed N c. slow to bare steerageway until the whale swims away N d. stop the vessel and sound repeated blasts on the ship's whistle to scare the whale away 981: The characteristic of a lighted cardinal mark may be __________.
Y a. very quick flashing N b. flashing N c. fixed N d. occulting 1045: The Light List shows that a navigational light has a nominal range of 15 miles and a height above water of 40 feet (12.2 meters). Your height of eye is 25 feet (7.6 meters) and the visibility is 5 miles. At about what range will you FIRST sight the light?
N a. 6.2 miles Y b. 9.5 miles N c. 12.9 miles N d. 14.2 miles 1171: A light that has a light period shorter than its dark period is described as __________.
Y a. flashing N b. pulsating N c. occulting N d. alternating 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 1239: While taking weather observations, you determine that the wind is blowing from the northeast. You would record the wind direction in the weather log as __________.
Y a. 045° N b. 090° N c. 135° N d. 225° 1246: What weather change accompanies the passage of a cold front in the Northern Hemisphere?
N a. Wind shift from northeast clockwise to southwest N b. Steady dropping of barometric pressure N c. Steady precipitation, gradually increasing in intensity Y d. A line of cumulonimbus clouds 1355: The parallax of the Moon is greatest when the Moon is __________.
N a. in the zenith at perigee N b. on the horizon at apogee N c. at its maximum altitude at apogee Y d. on the horizon at perigee 1399: You are bound for Baltimore via Cape Henry on a 15 knot ship. If the flood at Chesapeake Bay entrance begins at 1800 EST (ZD +5), at what time would you depart from the Chesapeake Bay entrance to have the most favorable current?
N a. 1700 hours N b. 1800 hours N c. 1900 hours Y d. 2030 hours 1424: Except for N-S courses, and E-W courses on the equator, a great circle track between two points, when compared to a rhumb line track between the same two points, will __________.
N a. always be nearer to the equator Y b. always be nearer to the elevated pole N c. be nearer to the pole in the Northern Hemisphere and nearer to the equator in the Southern Hemisphere N d. be nearer to the pole or the equator depending on the latitudes of the arrival and departure positions 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 1588: The letter D in illustration D006NG represents the __________.
Y a. geometrical horizon N b. geoidal horizon N c. celestial horizon N d. visible horizon 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 1697: In the Northern Hemisphere, if the center of a high pressure area is due west of you, what wind direction would you expect?
N a. South to west N b. South to east Y c. North to west N d. North to east 1829: 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 E in the illustration? (D036NG )
N a. One red light N b. Two green lights N c. Three green lights Y d. No light 1899: What is the relative bearing of an object broad on the starboard beam?
N a. 045° N b. 060° N c. 075° Y d. 090° 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 2069: Illustration D037NG represents a moveable dam. If a bear trap is open what will be displayed at the lock to indicate this condition? (D037NG )
N a. A flashing amber light Y b. A white circular disc N c. A red diamond N d. Two amber lights 2073: Chart legends printed in capital letters show that the associated landmark is __________.
N a. a radio transmitter N b. a government facility or station N c. inconspicuous Y d. conspicuous 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 2232: A vessel is heading magnetic north and its magnetic compass indicates a heading of 003°. Which action should be taken to remove this error during compass adjustment?
N a. If the red ends are to starboard you should raise the athwartships tray. Y b. If the red ends are to starboard, and the athwartships tray is at the bottom, you should remove some magnets. N c. If the red ends are to port, and the athwartships tray is at the top, you should reverse the magnets. N d. If the red ends are to port, and the athwartships tray is at the top, you should lower the tray. 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 2324: Deneb is found in what constellation?
Y a. Cygnus N b. Pegasus N c. Ursa Major N d. Andromeda 2388: The reference point for determination of GMT is the passage of the mean sun over what line?
N a. First point of Aries N b. Observer's meridian N c. 0° longitude Y d. 180° longitude 2414: You must construct a Mercator plotting sheet on a piece of paper measuring 20" by 28". The area includes latitude 38°S to 43°S and longitude 178°E to 175°W. Allow a one-half inch neat line on all sides. What is the maximum distance between each degree of longitude that will permit the area of the plotting sheet to be drawn within the stated limitations?
N a. 2.6 inches Y b. 2.9 inches N c. 3.2 inches N d. 3.5 inches 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 2525: Daylight savings time is a form of zone time that adopts the time __________.
N a. two zones to the west N b. two zones to the east N c. one zone to the west Y d. one zone to the east 2582: You must construct a Mercator plotting sheet on a piece of paper measuring 32" by 36". The area includes latitude 31°S to 37°S and longitude 005°W to 002°E. Allow a three-quarter inch neat line on all sides. What is the maximum distance between each degree of longitude that will permit the area of the plotting sheet to be drawn within the stated limitations?
N a. 4.00 inches N b. 4.11 inches N c. 4.25 inches Y d. 4.36 inches 2737: A lateral system buoy displaying a quick light __________.
N a. should be passed close aboard on either side Y b. indicates that special caution is required N c. is used at a channel bifurcation or junction N d. is painted with red and white vertical stripes 2882: While upbound through Memphis, the weather report on TV news indicates that a warm front is stationary over the Kentucky - Missouri - Tennessee areas. What weather conditions should you expect?
N a. Strong, gusting winds from the NW with thundershowers N b. Light winds from the northeast with clear skies N c. A "blue norther" Y d. Southerly winds with steady rain; fog or overcast 2952: The channel under a bridge is marked with lights of the lateral system. The centerline of the channel shall be marked on the bridge by __________.
Y a. an occulting white light N b. a yellow light N c. three fixed white lights N d. a flashing blue light 2969: A red triangular daymark marks __________.
N a. the centerline of a navigable channel Y b. the starboard side of a channel N c. a prominent object of navigational interest that has no lateral significance N d. an area of a channel where passing another vessel is permitted 3029: On 13 November 1981 you observe a back sight of the upper limb of the Moon. The sextant altitude (hs) is 110°31.2'. The height of eye is 46 feet and the index error is 2.0' on the arc. The horizontal parallax is 61.3'. What is the observed altitude (Ho)?
N a. 70°11.8' Y b. 69°41.8' N c. 69°25.6' N d. 69°18.4' 3065: Raster-scan chart data is __________.
N a. the only format recognized by IMO/IHO N b. organized into many separate files N c. composed of files that are smaller than vector files Y d. a digitized "picture" of a chart in one format and one layer 3073: ECDIS must give an alarm for which of the following cases?
Y a. If the ship is going to reach a critical point on the planned route N b. When the speed of a dangerous target exceeds a set limit N c. If the ship's ETA has changed beyond the set limit N d. All of the above