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.
18: A vessel's position should be plotted using bearings of __________.
N a. buoys close at hand Y b. fixed known objects on shore N c. buoys at a distance N d. All of the above 245: Yesterday you took a time tick using the 1200 GMT broadcast, and the chronometer read 11h 59m 59s. Today at the 1200 GMT time tick the chronometer read 00h 00m 01s. What is the chronometer error?
N a. Gaining 2 seconds N b. Losing 2 seconds N c. Fast 2 seconds Y d. Fast 1 second 247: Neap tides occur __________.
N a. at the start of spring, when the Sun is nearly over the equator N b. only when the Sun and Moon are on the same sides of the Earth and are nearly in line Y c. when the Sun and Moon are at approximately 90° to each other, as seen from the Earth N d. when the Sun, Moon, and Earth are nearly in line, regardless of alignment order 279: As a vessel changes course to starboard, the compass card in a magnetic compass __________.
Y a. remains aligned with compass north N b. also turns to starboard N c. first turns to starboard then counterclockwise to port N d. turns counterclockwise to port 361: As your vessel is heading southward along the east coast of the United States, you encounter a buoy showing a red flashing light. How should you pass this buoy?
N a. Pass it about 50 yards off on either side. Y b. Leave it to your starboard. N c. Leave it to your port. N d. Pass it well clear on either side. 429: A great circle crosses the equator at 127°W. It will also cross the equator at what other longitude?
N a. 127°E Y b. 53°E N c. 27°E N d. 27°W 449: You are enroute to assist vessel A. Vessel A is underway at 5 knots on course 063°T, and bears 136°T at 78 miles from you. What is the course to steer at 13 knots to intercept vessel A?
N a. 340° N b. 295° N c. 158° Y d. 114° 450: You are enroute to Jacksonville, FL, from San Juan, P.R. There is a fresh N'ly wind blowing. As you cross the axis of the Gulf Stream you would expect to encounter __________.
N a. cirrus clouds N b. smoother seas and warmer water Y c. steeper waves, closer together N d. long swells 454: On what does the operation of an aneroid barometer depend?
Y a. Thin, metal, air tight cell N b. Curved tube containing alcohol N c. Column of mercury supported by atmospheric pressure N d. Expansion of mercury in a closed tube 522: All straight lines represent great circle tracks on a chart based on a(n) __________.
N a. Mercator projection N b. polyconic projection N c. orthographic projection Y d. gnomonic projection 528: What should you expect when you encounter a tsunami in the open ocean?
N a. Violent seas from mixed directions Y b. No noticeable change from the existing sea state N c. Winds increasing to gale force from the northwest in the Northern Hemisphere N d. A major wave of extreme height and length 569: A line of position formed by sighting two charted objects in line is called a(n) __________.
N a. relative bearing Y b. range line N c. track line N d. estimated position 582: Distance along a track line is measured on a Mercator chart by using the __________.
Y a. latitude scale near the middle of the track line N b. longitude scale near the middle of the track line N c. latitude scale at the mid-latitude of the chart N d. latitude or longitude scale at the middle of the scale 606: Early indications of the approach of a hurricane may be all of the following EXCEPT __________.
Y a. short confused swells N b. gradually increasing white clouds (mare's tails) N c. pumping barometer N d. continuous fine mist-like rain 620: Chart legends which indicate a conspicuous landmark are printed in __________.
Y a. capital letters N b. italics N c. boldface print N d. underlined letters 638: Swell is the rise and fall of the ocean's surface due to __________.
N a. fetch Y b. distant winds N c. local storms N d. the pull of the moon 726: Atmospheric pressure at sea level is equal to __________.
N a. 14.7 pounds per square inch N b. 29.92 inches of mercury N c. 1013.25 millibars Y d. All of the above 778: The navigable semicircle of a hurricane in the Northern Hemisphere is that area of the storm measured __________.
N a. from true north clockwise to 180°T N b. from true north counterclockwise to 180°T N c. from the bow counterclockwise to 180° relative Y d. from the direction of the storm's movement counterclockwise 180° 806: Temperature and moisture characteristics are modified in a warm or cold air mass due to __________.
N a. pressure changes in the air mass Y b. movement of the air mass N c. the heterogeneous nature of the air mass N d. upper level atmospheric changes 849: The Light List shows that a navigational light has a nominal range of 12 miles and a height above water of 25 feet (7.6 meters). Your height of eye is 30 feet (9.1 meters) and the visibility is 0.5 mile. At what approximate range will you first sight the light?
N a. 0.5 mile Y b. 1.4 miles N c. 5.2 miles N d. 12.0 miles 863: The compass heading of a vessel differs from the true heading by __________.
Y a. compass error N b. variation N c. magnetic dip N d. deviation 972: In which source could you find the number of a chart for a certain geographic area?
N a. Chart No. 1 Y b. Catalog of Charts N c. American Practical Navigator N d. U.S. Coast Guard Light List 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 986: A warm air mass is characterized by __________.
Y a. stability N b. instability N c. gusty winds N d. good visibility 1093: The Flinders bar on a magnetic compass compensates for the __________.
Y a. induced magnetism in vertical soft iron N b. induced magnetism in horizontal soft iron N c. permanent magnetism in ship's steel N d. vessel's inclination from the vertical 1251: A List of Lights entry (L Fl) is a single flashing light which shows a long flash of not less than __________.
N a. 1.0 second duration N b. 1.5 seconds duration Y c. 2.0 seconds duration N d. 3.0 seconds duration 1259: General information on enroute weather and climate is found in __________.
Y a. the Sailing Directions and the Coast Pilot N b. a weather fax N c. the Local Notice to Mariners N d. the Light List 1308: On a voyage from Cape Town to London, the favorable ocean current off the coast of Africa is the __________.
N a. Canary Current Y b. Benguela Current N c. Agulhas Current N d. South Atlantic Current 1321: A lighthouse can be identified by its __________.
N a. painted color N b. light color and phase characteristic N c. type of structure Y d. All of the above 1345: A large automated navigational buoy, such as those that have replaced some lightships, would be shown on a chart by which symbol in illustration D015NG?
N a. D N b. C Y c. B N d. A 1585: The sidereal day begins when the __________.
Y a. first point of Aries is over the upper branch of the reference meridian N b. Sun is over the lower branch of the reference meridian N c. Sun is over the upper branch of the reference meridian N d. first point of Aries is over the lower branch of the reference meridian 1616: Which picture in illustration D034NG shows a Morse (A) light? (D034NG )
N a. A N b. B N c. C Y d. D 1656: Which instrument is most useful in forecasting fog?
N a. A barometer N b. An anemometer Y c. A sling psychrometer N d. A pyrometer 1657: Fog is formed when __________.
N a. the moisture in the air is condensed into small droplets N b. air is cooled to its dew point N c. the base of a cloud is on the ground Y d. All of the above 1714: Which statement concerning storm surges on the Great Lakes is FALSE?
Y a. They are common along the deeper areas of the lakes. N b. They cause rapid differences in levels between one end of the lake and the other. N c. The greatest water level difference occurs when the wind is blowing along the longitudinal axis of the lake. N d. If the wind subsides rapidly, a seiche effect will most likely occur. 1779: The Light List indicates that a light has a nominal range of 14 miles and is 26 feet high. If the visibility is 14 miles and your height of eye is 20 feet, at which approximate distance will you sight the light?
N a. 7.5 miles Y b. 11.2 miles N c. 14.0 miles N d. 18.1 miles 1994: Fomalhaut is found in what constellation?
N a. Leo N b. Taurus Y c. Pisces N d. Canis Major 2076: You should plot your dead reckoning position __________.
Y a. from every fix or running fix N b. from every estimated position N c. every three minutes in pilotage waters N d. only in pilotage waters 2100: You are underway in a vessel with a draft of 7.0 feet (2.1 meters). The charted depth for your position is 9 fathoms. You compute the height of tide to be +3.0 feet (0.9 meters). You determine the depth of the water beneath your keel to be __________.
N a. 32 feet (9.8 meters) N b. 41 feet (12.6 meters) Y c. 50 feet (15.3 meters) N d. 64 feet (19.6 meters) 2200: Cloud formations are minimal when the __________.
Y a. surface temperature and temperature aloft are equal N b. surface temperature and temperature aloft differ greatly N c. barometric pressure is very low N d. relative humidity is very high 2230: A nautical mile is a distance of approximately how much greater than or less than a statute mile?
N a. 1/4 less N b. 1/7 less N c. 1/4 greater Y d. 1/7 greater 2278: Superior conjunction occurs when __________.
N a. the Sun is at maximum declination north or south N b. a planet crosses the external plane of the ecliptic Y c. the Sun is between the Earth and a planet N d. two planets are in line 2334: Other than the Sun and Moon, the brightest object in the sky is __________.
N a. Sirius N b. Canopus Y c. Venus N d. Jupiter 2373: The vertical distance from the tidal datum to the level of the water is the __________.
N a. actual water depth N b. range of tide N c. charted depth Y d. height of tide 2396: Perihelion is the point where the Sun __________.
Y a. is nearest to the Earth N b. is farthest from the Earth N c. is on the opposite side of the Earth from the Moon N d. and Moon and Earth are in line 2426: You are in charge of a power-driven vessel crossing a river on the Western Rivers. You must keep out of the way of __________.
N a. a sail vessel descending the river N b. a power-driven vessel ascending the river N c. a vessel restricted in its ability to maneuver crossing the river Y d. All of the above 2580: The angle at the pole measured through 180°From the prime meridian to the meridian of a point is known as __________.
N a. the departure N b. the polar arc Y c. longitude N d. Greenwich hour angle 2583: You are in the Northern Hemisphere and a tropical wave is located 200 miles due west of your position. Where will the wave be located 24 hours later?
N a. In the same place N b. Closer and to the west N c. Closer and to the east Y d. Farther away to the west 2821: The height of tide is the __________.
N a. difference between the depth of the water at high tide and the depth of the water at low tide N b. depth of water at a specific time due to tidal effect Y c. difference between the depth of the water and the area's tidal datum N d. difference between the depth of the water and the high water tidal level 2904: Your radar displays your ship off center. As you proceed on your course, your ship's marker moves on the PPI scope while echoes from land masses remain stationary. What is this display called?
N a. Off center Y b. True motion N c. Stabilized N d. Head up 2979: You take a bearing of 356° of a lighthouse. What bearing of another object would give the best fix?
N a. 013° Y b. 082° N c. 176° N d. 201° 2981: The maritime radio system consisting of a series of coast stations transmitting coastal warnings is called __________.
Y a. NAVTEX N b. HYDROLANT/HYDROPAC N c. NAVAREA N d. SAFESEA 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° 3025: You determine your vessel's position by taking a range and bearing to a buoy. Your position will be plotted as a(n) __________.
Y a. estimated position N b. dead-reckoning position N c. fix N d. running fix 3040: Which instrument is used to predict the approach of a low pressure system?
N a. Anemometer N b. Fathometer Y c. Barometer N d. Thermometer 3057: IN REGION A of the IALA Buoyage System, when entering from seaward, the starboard side of a channel would be marked by a __________.
Y a. green conical buoy N b. green can buoy N c. red can buoy N d. red conical buoy 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 3115: 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. Destination N c. Location of antenna N d. None of the above 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 3118: With respect to automatic identification systems (AIS), which information is required to be broadcast every 1 to 10 seconds?
N a. Call sign and IMO number Y b. Course over ground and MMSI N c. MMSI number and call sign N d. Route Plan and navigational status