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.
95: The difference in local time between an observer on 114°W and one on 119°W is __________.
N a. 1.25 minutes N b. 5 minutes Y c. 20 minutes N d. 75 minutes 150: An alternating light __________.
N a. shows a light with varying lengths of the lighted period Y b. shows a light that changes color N c. marks an alternate lesser-used channel N d. is used as a replacement for another light 187: Which statement is TRUE concerning apogean tides?
N a. They occur only at quadrature. N b. They occur when the Moon is nearest the Earth. N c. They cause diurnal tides to become mixed. Y d. They have a decreased range from normal. 211: The light rhythm of Morse (A) is shown on __________.
N a. preferred-channel buoys N b. starboard- or port-side buoys N c. special marks Y d. safe water buoys 257: Spring 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 side of the Earth and nearly in line N c. when the Sun and Moon are at approximately 90° to each other as seen from the Earth Y d. when the Sun, Moon, and Earth are nearly in line, in any order 262: Which of the buoy symbols shown indicates a safe water mark? (D032NG )
N a. A N b. B N c. C Y d. D 309: You are underway on course 050°T and your maximum speed is 12 knots. The eye of a hurricane bears 120°T, 110 miles from your position. The hurricane is moving towards 285°T at 25 knots. What course should you steer at 12 knots to have the maximum CPA?
N a. 332° N b. 339° Y c. 346° N d. 357° 424: For an accurate barometer check, you would __________.
N a. check it with a barometer on another vessel N b. take readings from several barometers and average them N c. check it with the barometer at the ship chandlery Y d. check it against radio or National Weather Service reports of the immediate vicinity 472: Which conic projection chart features straight lines which closely approximate a great circle?
N a. Polyconic Y b. Lambert conformal N c. Orthographic N d. Stereographic 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 570: Chart legends printed in capital letters show that the associated landmark is __________.
N a. inconspicuous Y b. conspicuous N c. a government facility or station N d. a radio transmitter 581: The Captain of the Port has closed to navigation, and buoyed, a section of a harbor. These buoys would be painted __________.
N a. red or green to conform with the other lateral aids N b. red and green horizontally-striped N c. solid yellow Y d. white with orange markings 611: Information markers, when lighted, will display __________.
N a. yellow lights N b. green lights Y c. white lights N d. red lights 617: You are bound for the Chelsea docks in the Hudson River. The Captain wants to arrive at the docks at the first slack water on 28 July 1983. You are keeping daylight saving time. What time should you be at the docks?
Y a. 0215 N b. 0530 N c. 0811 N d. 0911 631: A light characteristic of composite group flashing indicates that there is a(n) __________.
N a. sharp turn in the channel N b. narrowing in the channel at that point Y c. junction in the channel N d. obstruction that must be left to port 647: You will enter Argentia, Newfoundland, at 1200 on 5 October 1983, while keeping zone description +3 on the ship's clocks. What will be the height of tide at this time (based on the Canadian chart datum)?
N a. 0.5 feet N b. 1.2 feet Y c. 2.1 feet N d. 3.4 feet 714: When using the ARPA in heavy rain, which action should you take?
N a. Increase the radar gain to pick up weak echoes through the rain. N b. Increase the STC setting to reduce close-in spurious signals. Y c. Navigate as though the effective range of the radar has been reduced. N d. Increase the range of the inner and outer guard rings. 777: With respect to a reversing current, slack water occurs when there is __________.
Y a. little or no horizontal motion of the water N b. little or no vertical motion of the water N c. a weak ebb or flood current N d. when winds cause water to back up in a river mouth 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 814: Steam smoke will occur when __________.
Y a. extremely cold air from shore passes over warmer water N b. warm dry air from shore passes over cooler water N c. cold ocean water evaporates into warm air N d. cool rain passes through a warm air mass 904: All of the following are associated with cumulonimbus clouds EXCEPT __________.
Y a. steady rainfall N b. hail storms N c. thunderstorms N d. tornadoes or waterspouts 949: In Region A of the IALA Buoyage System, when entering from seaward, the port side of a channel would be marked by a __________.
N a. black can buoy Y b. red can buoy N c. black conical buoy N d. red conical buoy 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 997: A coastal current __________.
N a. is generated by waves striking the beach Y b. flows outside the surf zone N c. flows in a circular pattern N d. is also known as a longshore current 1014: Relative humidity is the percentage of water vapor that is in the air as compared to the maximum amount it can hold at __________.
N a. a specific barometric pressure Y b. a specific temperature N c. a specific wind speed N d. any time 1027: In the Northern Hemisphere the major ocean currents tend to flow __________.
Y a. clockwise around the North Atlantic and North Pacific Oceans N b. clockwise or counterclockwise depending on whether it is warm or cold current N c. counterclockwise except in the Gulf Stream N d. counterclockwise around the North Atlantic and North Pacific Oceans 1041: You are steaming along the coast of Ireland in the Irish Sea. You sight a lighted buoy with a white flashing light showing a group of two flashes. The buoy indicates you __________.
N a. must pass south of the buoy N b. must pass north of the buoy Y c. should pass well clear on either side of the buoy N d. must pass the buoy close to starboard 1051: Under the IALA Buoyage Systems, a cardinal mark may NOT be used to __________.
N a. indicate that the deepest water in an area is on the named side of the mark N b. indicate the safe side on which to pass a danger N c. draw attention to a feature in the channel such as a bend, junction, bifurcation, or end of a shoal Y d. indicate the port and starboard sides of well-defined channels 1053: Before a magnetic compass is adjusted certain correctors must be checked to ensure that they are free of permanent magnetism. These correctors are the __________.
N a. fore-and-aft and athwartships magnets N b. dip needle and heeling magnet N c. heeling magnet and Flinders bar Y d. Flinders bar and quadrantal spheres 1065: You are in the Northern Hemisphere and a tropical wave is located 200 miles due east of your position. Where will the wave be located 12 hours later?
N a. Farther away to the east N b. In the same position Y c. Nearby to the east N d. Farther away to the west 1197: Off Fire Island, NY with winds from the southwest, the average wind-driven current flows in a direction of __________.
N a. 014° Y b. 076° N c. 170° N d. 256° 1253: The horizontal angle between the magnetic meridian and the north-south line of the magnetic compass is __________.
Y a. deviation N b. variation N c. compass error N d. dip 1441: Your height of eye is 40 feet (12.2 meters). What is the approximate geographical distance at which Ambrose Light, NY, could be visible? Refer to "Reprints from the LIGHT LISTS AND COAST PILOTS".
N a. 18.3 nm N b. 19.5 nm Y c. 21.0 nm N d. 22.8 nm 1455: Inferior conjunction is possible for __________.
Y a. Mercury N b. Saturn N c. Mars N d. Jupiter 1478: Altostratus clouds are indicated by which number? (D039NG )
N a. 1 Y b. 4 N c. 7 N d. 8 1583: The angle measured from the observer's meridian, clockwise or counterclockwise up to 180°, to the vertical circle of the body is the __________.
N a. local hour angle Y b. azimuth angle N c. meridian angle N d. observer's longitude 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 1625: A sling psychrometer is used to measure __________.
N a. seawater temperature N b. engine temperature Y c. dry bulb and wet bulb temperatures N d. barometric pressure 1763: Weather patterns in the Gulf Coast area of the United States are __________.
Y a. those of a transition zone between tropical and a temperate area N b. those of a tropical region N c. extremely hot in summer N d. tropical over Florida and subtropical over the rest of the Gulf Coast area 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 1798: The climate of the northern Gulf coast __________.
N a. is humid and subtropical throughout the year N b. has an east coast marine type of climate Y c. is a warm marine type of climate N d. varies from warm to subtropical 2052: Under the chart numbering system used by NGA (NIMA), the first digit of a multi-digit number indicates __________.
Y a. the general geographic area N b. the general scale of the chart N c. whether it is a major or minor chart N d. the projection used to construct the chart 2093: Information about major breakdowns, repairs, or other emergency operations with regard to weirs and (or) wicket dams, on the western rivers, may be obtained from the __________.
N a. Light List Vol. V N b. List of Lights Y c. Broadcast Notice to Mariners N d. Sailing Directions 2146: 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 Y c. Red over amber (yellow) N d. None of the above 2184: By convention, the south seeking ends of a compass' magnets are colored __________.
Y a. blue N b. red N c. white N d. black 2236: Which is TRUE of a downbound power-driven vessel, when meeting an upbound vessel on the Western Rivers?
N a. She has the right of way. N b. She shall propose the manner of passage. N c. She shall initiate the maneuvering signals. Y d. All of the above 2289: The constellation that contains the pointer stars is __________.
N a. Orion Y b. Ursa Major N c. the Southern Cross N d. Pegasus 2354: A vessel is heading magnetic east and its magnetic compass indicates a heading of 093°. What action should be taken to remove this error during compass adjustment?
N a. If the blue ends of the magnets are to port you should raise the athwartships tray. N b. If the red ends of magnets are to port you should lower the athwartships tray. N c. If the red ends of the magnets are aft you should lower the fore-and-aft tray. Y d. If the blue ends of the magnets are forward you should raise the fore-and-aft tray. 2397: The letter D in illustration D006NG represents the __________.
N a. sensible horizon N b. celestial horizon N c. visible horizon Y d. geometrical horizon 2406: The dividing meridian between zone descriptions +4 and +5 is __________.
Y a. 67°30'W N b. 90°00'W N c. 67°30'E N d. 75°00'E 2494: You must construct a Mercator plotting sheet on a piece of paper measuring 24" by 30". The area includes latitude 28°N to 35°N and longitude 175°E to 178°W. 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 limitation?
N a. 3.40 inches Y b. 3.22 inches N c. 3.03 inches N d. 2.91 inches 2578: You must draw a plotting sheet covering latitudes 49°N to 53°N and longitudes 179°E to 178°W. If the distance between latitude 49°N to 53°N is 16 inches, what is the distance between the meridians of 1° of longitude?
N a. 2.12 inches N b. 2.33 inches Y c. 2.56 inches N d. 2.81 inches 2584: You must construct a Mercator plotting sheet on a piece of paper measuring 30" by 36". The area includes latitude 30°45'S to 37°15'S and longitude 004°00'E to 005°00'W. Allow a one 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 limitation?
N a. 3.09 inches N b. 3.22 inches N c. 3.41 inches Y d. 3.58 inches 2620: The navigator is concerned with three systems of coordinates. Which system is not of major concern?
N a. Terrestrial Y b. Ecliptic N c. Celestial horizon N d. Celestial equator 2646: During daylight savings time the meridian used for determining the time is located farther __________.
Y a. east N b. west N c. east in west longitude and west in east longitude N d. west in west longitude and east in east longitude 2891: Twenty-three meters equals __________.
N a. 17.50 feet Y b. 75.46 feet N c. 96.00 feet N d. 104.99 feet 2923: You should plot your dead reckoning position __________.
N a. from every estimated position Y b. from every fix or running fix N c. every three minutes in pilotage waters N d. only in pilotage waters 2973: You should plot a dead reckoning position after every __________.
N a. course change N b. speed change N c. fix or running fix Y d. All of the above 3022: A green-and-red banded daymark, green band uppermost, will have the shape shown at letter __________. (D045NG )
Y a. A N b. B N c. C N d. D 3130: When may the automatic identification system (AIS) be switched off?
N a. At anytime as long as it is properly logged. Y b. At the Master's professional judgment. N c. Only when the vessel is at anchor or in port. N d. Under no circumstance.