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.
49: While steering a course of 150°T, you wish to observe a body for a latitude check. What would the azimuth have to be?
Y a. 000°T N b. 090°T N c. 150°T N d. 240°T 92: When utilizing a Pacific Coast chart, the reference plane of soundings is __________.
N a. mean low water springs N b. mean low water Y c. mean lower low water N d. lowest normal low water 92: When utilizing a Pacific Coast chart, the reference plane of soundings is __________.
N a. mean low water springs N b. mean low water Y c. mean lower low water N d. lowest normal low water 124: An electronic depth finder operates on the principle that __________.
N a. radio signals reflect from a solid surface Y b. sound waves travel at a constant speed through water N c. radar signals travel at a constant speed through water N d. pressure increases with depth 209: The West Wind Drift is located __________.
Y a. near 60°S N b. on each side of the Equatorial Current N c. in the North Atlantic between Greenland and Europe N d. in the South Pacific near 5°S 217: In some parts of the world there is often a slight fall in tide during the middle of the high water period. The effect is to create a longer period of stand at higher water. This special feature is called a(n) __________.
N a. apogean tide Y b. double high water N c. perigean tide N d. bore 317: The time meridian used for tide computations in New York Harbor is __________.
N a. 52°30'W N b. 60°00'W Y c. 75°00'W N d. 82°30'W 334: The index error is determined by adjusting the __________.
N a. sextant frame N b. horizon glass N c. index mirror Y d. micrometer drum 458: The prevailing westerlies of the Southern Hemisphere blow 18-30 knots __________.
Y a. all year long N b. during the summer months only N c. during the winter only N d. during spring only 519: The chart of a beach area shows a very flat slope to the underwater beach bottom. What type of breakers can be expected when trying to land a boat on this beach?
N a. Surging Y b. Spilling N c. Plunging N d. Converging 521: Which sextant has an index error of 2'10" on the arc? (D050NG )
N a. A N b. B N c. C Y d. D 579: Low pressure disturbances, which travel along the intertropical convergence zone, are called __________.
N a. permanent waves N b. tidal waves Y c. tropical waves N d. tropical storms 653: You have been observing your radar screen and notice that a contact on the screen has remained in the same position, relative to you, for several minutes. Your vessel is making 10 knots through the water. Which statement is TRUE?
N a. The contact is dead in the water. Y b. The contact is on the same course and speed as your vessel. N c. The contact is on a reciprocal course at the same speed as your vessel. N d. The radar is showing false echoes and is probably defective. 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 767: What describes a flood current?
N a. Horizontal movement of the water toward the land after high tide Y b. Horizontal movement of the water toward the land after low tide N c. Horizontal movement of the water away from the land following high tide N d. Horizontal movement of the water away from the land following low tide 781: The IALA Buoyage Systems do NOT apply to __________.
N a. the sides and centerlines of navigable channels N b. natural dangers and other obstructions, such as wrecks Y c. lighthouses and lightships N d. areas in which navigation may be subject to regulation 827: The Benguela Current flows in a __________.
N a. SW'ly direction along the NW coast of Africa N b. S'ly direction off the East Coast of Australia Y c. NW'ly direction along the SW coast of Africa N d. SW'ly direction along the SE coast of Greenland 871: Under the IALA-A Buoyage System, a buoy marking the starboard side of the channel when approaching from seaward must have a(n) __________.
N a. pillar shape Y b. green color N c. square topmark N d. even number 891: Under the IALA-A Buoyage System, a buoy indicating the preferred channel is to port would have __________.
N a. an even number N b. an odd number N c. a pillar shape Y d. horizontal bands 920: What is the average speed of the movement of a hurricane following the recurvature of its track?
N a. 5 to 10 knots Y b. 20 to 30 knots N c. 40 to 50 knots N d. Over 60 knots 1013: The purpose of the soft iron spheres mounted on arms on the binnacle is to compensate for __________.
N a. the vertical component of the permanent magnetism of the vessel N b. the residual deviation N c. magnetic fields caused by electrical currents in the vicinity Y d. induced magnetism in the horizontal soft iron 1085: A chart position enclosed by a semi-circle is a(n) __________.
N a. fix N b. estimated position Y c. dead reckoning position N d. running fix 1113: A single vertical magnet placed underneath the compass in the binnacle is used to compensate for __________.
N a. the horizontal component of the permanent magnetism Y b. deviation caused by the vessel's inclination from the vertical N c. induced magnetism in the horizontal soft iron N d. induced magnetism in the vertical soft iron 1120: You are on course 042°T. To check the course of your vessel you should observe a celestial body on which bearing?
N a. 090° Y b. 132° N c. 180° N d. 222° 1126: When a warm air mass is adjacent to a cold air mass, the separation line between the two is called a(n) __________.
Y a. front N b. isobar N c. isotherm N d. equipotential line 1133: Which compensates for errors introduced when the vessel heels over?
N a. The soft iron spheres on the arms of the binnacle N b. Magnets placed in trays inside the binnacle Y c. A single vertical magnet beneath the compass N d. The Flinders bar 1162: A line connecting all possible positions of your vessel at any given time is a __________.
N a. longitude line N b. latitude line Y c. line of position N d. fix 1188: The magnitude of three stars is indicated. Which star is the brightest?
N a. Antares + 1.2 N b. Altair + 0.9 Y c. Vega + 0.1 N d. Cannot be determined; magnitude indicates size not brightness 1204: Which of the symbols in illustration DO18NG designates a stationary front? (D018NG )
Y a. A N b. B N c. C N d. D 1261: A light having characteristics which include color variations is defined as __________.
N a. switching Y b. alternating N c. oscillating N d. fluctuating 1296: After a cold front passes the barometric pressure usually __________.
N a. fluctuates N b. remains the same N c. remains the same, with clouds forming rapidly Y d. rises, often quite rapidly, with clearing skies 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 1352: Weather observations provided by each weather station include all of the following except __________.
N a. temperature N b. visibility Y c. predicted weather for the next twelve hours N d. barometric pressure and change in the last three hours 1404: A great circle will intersect the equator at how many degrees of longitude apart?
N a. 0° N b. 45° N c. 90° Y d. 180° 1450: The distance between the surface of the water and the tidal datum is the __________.
N a. range of tide N b. charted depth Y c. height of tide N d. actual water depth 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 1517: When determining compass error by an azimuth of Polaris, you enter the Nautical Almanac with the __________.
N a. GHA Aries Y b. LHA Aries N c. LHA Polaris N d. GHA Polaris 1517: When determining compass error by an azimuth of Polaris, you enter the Nautical Almanac with the __________.
N a. GHA Aries Y b. LHA Aries N c. LHA Polaris N d. GHA Polaris 1526: A single barometric pressure reading of 28.60 indicates __________.
N a. rapidly improving weather N b. deteriorating weather Y c. a severe low pressure system N d. fair weather and calm 1599: The time interval between successive wave crests is called the __________.
N a. trough Y b. period N c. frequency N d. epoch 1614: Hot air can hold __________.
N a. less moisture than cold air Y b. more moisture than cold air N c. the same amount of moisture as cold air N d. moisture independent of air temperature 1680: A weather front exists when __________.
N a. air masses of the same temperature meet Y b. air masses of different temperatures meet N c. many clouds create a differential in air density N d. two lows are separated by a ridge of higher pressure 1713: When a tornado moves over the water from land it is called a __________.
N a. tornado Y b. waterspout N c. hurricane N d. cyclone 1744: Which condition suggests that your present position lies in the navigable semicircle of a tropical storm?
Y a. A backing wind N b. A veering wind N c. Sustained gale force winds N d. A strong wind that maintains a constant speed and direction 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 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 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 2002: What term is used to describe a river barge designed to carry coal or any similar cargo not requiring weather protection?
N a. Single skin N b. Double skin Y c. Open hopper N d. Deck barge 2104: A white buoy marked with an orange rectangle indicates __________.
N a. mid-channel N b. a fish net area Y c. general information N d. an anchorage 2152: Permanent magnetism is found in __________.
Y a. hard iron N b. soft iron N c. vertical iron only N d. horizontal iron only 2244: Capella is found in what constellation?
N a. Gemini Y b. Auriga N c. Libra N d. Crab 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 2492: A star that suddenly becomes several magnitudes brighter and then gradually fades is a __________.
N a. double star N b. variable star Y c. nova N d. nebula 2504: Under the IALA-A Buoyage System, when entering from seaward a lateral system buoy to be left to starboard may display which topmark shown? (D046NG )
N a. A N b. B Y c. C N d. D 2660: In the celestial equator system of coordinates what is equivalent to the longitude of the Earth system of coordinates?
N a. Zenith distance N b. Azimuth angle N c. Declination Y d. Greenwich hour angle 2802: The pictures shown represent the geographic location of a vessel and the radar presentation at the same time. Which statement is TRUE? (D011NG )
N a. Ship No. 1 does not paint as an individual target due to the effect of pulse length. Y b. The small island is not detected due to shadow effect of the mountain. N c. A target bearing of the headland to the south-southeast is corrected by adding one-half of the beam width. N d. Ship No. 2 is not detected due to the reflective mass of the mountain overpowering the ship's reflective signals. 2858: While navigating in fog off a coastline of steep cliffs, you hear the echo of the ships fog horn 2 1/2 seconds after the signal was sounded. What is the distance to the shore?
N a. 225 yards Y b. 460 yards N c. 750 yards N d. 910 yards 2938: You take a bearing of 176° of a lighthouse. What bearing of another object would give the best fix?
N a. 000° N b. 021° N c. 189° Y d. 272° 3123: Which of the following statements is TRUE regarding automatic identification systems (AIS)?
N a. AIS is a global tracking system that relies upon INMARSAT C service to communicate vessel position and other safety related information to similarly equipped vessels, aircraft and shore stations within the area. N b. AIS is a short-range 3 cm X-band radar system that automatically sends a vessel's position and other safety related information to similarly equipped vessels, aircraft and shore stations within the area. Y c. AIS is a short-range VHF-FM system that automatically broadcasts a vessel's position and other safety related information frequently to similarly equipped vessels, aircraft and shore stations within the area. N d. AIS is a one-way centrally managed system that requires the local VTS to send commands to instruct each vessel to broadcast position and other safety related information to similarly equipped vessels, aircraft and shore stations within the area. 3125: Which of the following statements is TRUE regarding automatic identification systems (AIS)?
N a. AIS is designed to replace ARPA, maneuvering boards, and visual bearings as a means to ascertain the risk of collision. Y b. AIS provides near real-time information regarding another vessel's speed over ground and heading regardless of visibility. N c. AIS will not provide information on another vessel if that vessel is indistinguishable in radar sea clutter. N d. AIS can be relied upon as the sole means to determine course changes due to other AIS equipped traffic.