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.
83: All Loran-C transmitting stations are equipped with cesium frequency standards which permit __________.
N a. every station in one chain to transmit at the same time Y b. each station to transmit without reference to another station N c. on-line transmission of single-line transmitters at the same time N d. each station to only depend on the master for synchronization and signal ratio 108: A position that is obtained by using two or more intersecting lines of position taken at nearly the same time, is a(n) __________.
N a. dead-reckoning position N b. estimated position Y c. fix N d. running fix 122: The subregions of the United States Gulf and East Coasts are numbered 11, 12 and 13 within the chart numbering system. Which chart number indicates a chart for either the Gulf or East Coast?
Y a. 11250 N b. 18411 N c. 21228 N d. 17136 141: You are enroute to assist vessel A. Vessel A is underway at 6 knots on course 133°T, and bears 042°T, 105 miles from you. What is the time to intercept if you make 10 knots?
N a. 12h 30m N b. 12h 44m Y c. 12h 58m N d. 13h 22m 218: Lines of position may be __________.
N a. hyperbolas N b. straight lines N c. arcs Y d. All of the above 252: A large automated navigational buoy, such as those that have replaced some lightships, would be shown on a chart by which symbol? (D015NG )
N a. A Y b. B N c. C N d. D 286: On the pole side of the trade wind belt, there is an area of high pressure with weak pressure gradients and light, variable winds. This area is called the __________.
N a. prevailing westerlies N b. geostrophic winds N c. doldrums Y d. horse latitudes 320: Sometimes foreign charts are reproduced by NGA (NIMA). On such a chart, a wire-dragged, swept area may be shown in green or __________.
N a. red N b. black Y c. purple N d. yellow 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° 426: The wind speed and direction observed from a moving vessel is known as __________.
N a. coordinate wind N b. true wind Y c. apparent wind N d. anemometer wind 558: A buoy bears 176°T at 3000 yards. What is the course to make good to leave the buoy 100 yards to starboard?
Y a. 174°T N b. 176°T N c. 178°T N d. 180°T 589: What is the index error of sextant D? (D050NG )
N a. 7'10" on the arc N b. 6'50" on the arc N c. 3'00" on the arc Y d. 2'10" on the arc 654: Your ARPA has automatic speed inputs from the log. Due to currents, the log is indicating a faster speed than the speed over the ground. What should you expect under these circumstances?
N a. The generated CPA will be less than the actual CPA. N b. The generated TCPA will be later than the actual TCPA. N c. The range of initial target acquisition will be less than normal. Y d. The targets true course vector will be in error. 675: 15° of latitude is equal to __________.
N a. 600 miles Y b. 900 miles N c. 1200 miles N d. 1500 miles 705: The precession of the equinoxes occurs in a(n) __________.
N a. easterly direction Y b. westerly direction N c. northerly direction N d. southerly direction 741: What is the light phase characteristic of a lighted isolated-danger mark?
N a. Interrupted quick flashing N b. Very quick flashing N c. Long flashing Y d. Group flashing 754: Deviation in a compass is caused by the __________.
N a. vessel's geographic position N b. vessel's heading N c. earth's magnetic field Y d. influence of the magnetic materials of the vessel 754: Deviation in a compass is caused by the __________.
N a. vessel's geographic position N b. vessel's heading N c. earth's magnetic field Y d. influence of the magnetic materials of the vessel 959: What is the index error of sextant B in illustration D050NG? (D050NG )
N a. 0'30" off the arc N b. 1'00" off the arc Y c. 3'30" off the arc N d. 1'30" on the arc 1005: The refraction correction table given in the Nautical Almanac is based on a standard or average atmospheric density with a temperature of 50°F (10°C) and atmospheric pressure of __________.
N a. 29.72 inches (1006 millibars) Y b. 29.83 inches (1010 millibars) N c. 29.89 inches (1012 millibars) N d. 29.93 inches (1014 millibars) 1121: The articulated light is superior to other types of buoys because __________.
N a. the radar reflectors reflect better signals N b. fog horn signals travel farther to sea N c. it is equipped with strobe lights Y d. it has a reduced watch circle 1165: Which statement concerning the chartlet is TRUE? (Soundings and heights are in meters) (D010NG )
N a. Maury lightship is visible for 17 miles. Y b. There is a dangerous eddy southeast of Beito Island. N c. There is a 12-meter deep west of Beito Island and inside the 5-meter line. N d. The bottom to the south-southeast of the lightship is soft coral. 1277: The velocity and direction of the tidal current at Port Morris, NY, at 1135 DST (ZD +4) on 13 May 1983 will be __________.
Y a. negligible at 220°T N b. 3.1 knots at 045°T N c. 1.2 knots at 220°T N d. 1.0 knot at 045°T 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 1411: The nominal range of a light may be accurately defined as the maximum distance at which a light may be seen __________.
N a. under existing visibility conditions N b. under perfect visibility Y c. with ten miles visibility N d. with fifteen miles visibility 1576: You are entering an east coast port and see a buoy with a yellow triangle painted on it. This indicates __________.
Y a. you are in the vicinity of the ICW N b. the buoy is a special mark N c. the buoy is off station N d. the buoy designates a sharp turn in the channel 1617: The inner cloud bands of a hurricane, when viewed from a distance, form a mass of dense, black cumulonimbus clouds called the __________.
Y a. bar of the storm N b. eye of the storm N c. funnel N d. front 1665: Air circulation is caused or affected by __________.
N a. the rotation of the earth on its axis N b. convection currents caused by differences in radiant heating between equatorial and polar regions N c. mountain ranges Y d. All of the above 1705: Two well-developed low pressure areas may be separated by a __________.
N a. trough of higher pressure N b. hill of higher pressure Y c. ridge of higher pressure N d. valley of higher pressure 1787: What indicates that a tropical cyclone may be within 500 to 1,000 miles of your position?
Y a. A pumping of the barometer up and down a few millibars N b. A sudden wind shift from southwest to northwest followed by steadily increasing winds N c. The normal swell pattern becoming confused, with the length of the swell increasing N d. An overcast sky with steadily increasing rain from nimbostratus clouds 1810: Where will you find information about the duration of slack water?
N a. Tide Tables N b. Sailing Directions Y c. Tidal Current Tables N d. American Practical Navigator 1844: What is the relative bearing of an object sighted dead ahead?
N a. 180° N b. 090° N c. 015° Y d. 000° 1918: The Moon appears larger in diameter at the zenith than when near the horizon. What is this called?
N a. Parallax in altitude Y b. Augmentation N c. Horizontal parallax N d. Libration 1992: The parallel of latitude at 23°27'S is the __________.
N a. Tropic of Cancer Y b. Tropic of Capricorn N c. Arctic Circle N d. ecliptic 2030: A vessel heading NE is on a course of __________.
N a. 022.5° Y b. 045.0° N c. 067.5° N d. 090.0° 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 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) 2158: Permanent magnetism is caused by __________.
N a. operation of electrical equipment and generators on board ship Y b. the earth's magnetic field affecting the ship's hard iron during construction N c. the horizontal component of the earth's magnetic field acting on the horizontal soft iron N d. the vertical component of the earth's magnetic field acting on the vertical soft iron 2164: The line connecting the points of the earth's surface where there is no dip is the __________.
N a. agonic line Y b. magnetic equator N c. isodynamic N d. isopor 2214: By convention, the Earth's south magnetic pole is colored __________.
N a. blue N b. black N c. white Y d. red 2277: The Light List indicates that a light has a nominal range of 20 miles and is 52 feet high. If the visibility is 12.0 miles and your height of eye is 20 feet, at what approximate distance will you sight the light?
N a. 21.5 miles N b. 20.0 miles Y c. 13.7 miles N d. 12.0 miles 2280: Which would influence a magnetic compass?
N a. Electrical wiring N b. Iron pipe N c. Radio Y d. All of the above 2342: What happens because of augmentation?
Y a. The Moon appears larger as the elevation increases. N b. The Sun appears larger when viewed against the darker background of the horizon. N c. The horizon appears elevated when observing a bright Sun or Moon at low altitudes. N d. The Moon appears larger at the full Moon. 2423: IN REGION A of the IALA Buoyage System, when entering from seaward, the starboard side of a channel would be marked by a __________.
N a. red conical buoy Y b. green conical buoy N c. red can buoy N d. green can buoy 2499: The "head of the bend" is the __________.
Y a. top or upstream beginning of a bend N b. bottom or downstream beginning of a bend N c. midpoint or center radius of a bend N d. center line or apex of a bend 2602: The lunar day is also known as the __________.
N a. lunitidal interval N b. vulgar establishment of the port N c. nodal day Y d. tidal day 2638: A vessel crossing a river on the Western Rivers has the right of way over __________.
N a. vessels ascending the river N b. vessels descending the river N c. all vessels ascending and descending the river Y d. None of the above 2708: You are approaching a drawbridge and have sounded the proper whistle signal requesting it to open. You hear a signal of one prolonged and one short blast from the bridge. Which action should you take?
N a. Anchor or use an alternate route because the bridge is out of service for an extended period of time. N b. Approach to a point not closer than 400 yards (360 meters) from the bridge and await further signals. N c. Hold in the channel as the bridge will open within 15 minutes. Y d. Approach under full control to pass through the bridge. 2862: When slanted letters are used to spell the name of a charted object you know the __________.
N a. object is only a hazard to vessels drawing in excess of 20 feet N b. position is approximate or doubtful N c. object is always visible Y d. object may cover and uncover with the tide 2936: Information on search and rescue procedures and special, local communications used in Mexican waters will be found in the __________.
N a. World Port Index N b. International Code of Signals (Pub 102) Y c. Sailing Directions (Planning Guides) N d. International Aeronautical and Maritime Search and Rescue Manual 2968: Some locations maintain a zone time of -13. What are the zone time and date if the Greenwich time and date are 0152, 10 January?
N a. 0052, 9 January N b. 0258, 9 January Y c. 1452, 10 January N d. 0052, 11 January 2986: Some places maintain a zone time of -13. What are the time and date at Greenwich if the zone time and date are 2152, 10 January?
N a. 1052, 9 January Y b. 0852, 10 January N c. 1052, 10 January N d. 1052, 11 January 2991: When using a radar in an unstabilized mode, fixes are determined most easily from __________.
N a. objects that are close aboard Y b. ranges N c. tangent bearings N d. center bearings 2994: You take a bearing of 313° and 076° of two objects. Which bearing of a third object will give the best fix?
Y a. 014° N b. 133° N c. 255° N d. 339° 3005: The agonic line on an isomagnetic chart indicates the __________.
N a. magnetic equator N b. magnetic longitude reference line Y c. points where there is no variation N d. points where there is no annual change in variation 3070: The database information that should be shown when a chart is first displayed on ECDIS is the __________.
N a. display base information Y b. standard display information N c. system electronic nautical chart N d. chart display information 3102: The typical operating range of automatic identification systems (AIS) at sea is nominally __________.
N a. 50-75 nm Y b. 20-25 nm N c. 6-8 nm N d. 3-4 nm 3104: In general, on how many radio channels will an automatic identification system (AIS) operate?
Y a. 3 N b. 5 N c. 7 N d. 9 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 3129: Which of the following statements is TRUE regarding automatic identification systems (AIS) ?
Y a. The master may, at his/her discretion, turn off the AIS if he/she believes that it may compromise the safety or security of the vessel. N b. Under no circumstances shall AIS be turned off while underway as this could endanger the vessel and those around her. N c. AIS is always required to be operating if the vessel is in or in the vicinity of a VTS area. N d. AIS is always required to be operating if the vessel is within 100 nautical miles of the coastline.