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.
20: 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. If you maneuver at 12 knots to avoid the hurricane, what could be the maximum CPA?
Y a. 77 miles N b. 82 miles N c. 87 miles N d. 93 miles 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 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 185: A ship is in longitude 54°00'W on a true course of 270°. The ship's clocks are on the proper time zone. At what longitude should the clocks be changed to maintain the proper zone time?
N a. 45°00'W N b. 52°30'W N c. 60°00'W Y d. 67°30'W 235: When the equation of time is taken from the Nautical Almanac for use in celestial navigation, it is used to determine __________.
N a. zone time N b. sunrise Y c. time of local apparent noon N d. local mean time 274: Which of the four adjustable errors in the sextant causes side error?
Y a. Horizon glass not being perpendicular to the frame N b. Index mirror not being perpendicular to the frame N c. Telescope not being parallel to the frame N d. Elliptical centering error 370: Prevailing winds between 30°N and 60°N latitude are from the __________.
N a. north N b. south N c. east Y d. west 375: If the Sun's observed altitude is 47°50', the zenith distance is __________.
Y a. 42°10' N b. 42°50' N c. 47°50' N d. 132°10' 412: If you were sailing in the North Pacific and were interested in the ice and iceberg limits, you could find this information in the __________.
Y a. Pilot Chart N b. Coast Pilot N c. Notice to Mariners N d. None of the above 422: If you are sailing from the East Coast of the United States to the Caribbean Sea, which publication would contain information on weather, currents, and storms?
N a. Sailing Charts of the Caribbean Sea Y b. Pilot Charts of the North Atlantic N c. Light Lists, Atlantic and Gulf Coast N d. Tidal Current Tables 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 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 438: Your longitude is 124°E, and your local mean time is 0520 on the 5th of the month. The mean time and date at Greenwich is __________.
N a. 1336 on the 4th N b. 1336 on the 5th Y c. 2104 on the 4th N d. 2104 on the 5th 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° 466: In the relatively calm area near the hurricane center, the seas are __________.
N a. moderate but easily navigated N b. calm Y c. mountainous and confused N d. mountainous but fairly regular as far as direction is concerned 534: What is TRUE concerning an anemometer on a moving vessel?
N a. It measures true wind speed. N b. It measures true wind speed and true wind direction. Y c. It measures apparent wind speed. N d. It measures apparent wind speed and true wind direction. 542: The only cylindrical chart projection widely used for navigation is the __________.
N a. Lambert conformal Y b. Mercator N c. azimuthal N d. gnomonic 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 574: If your mercurial barometer reads 30.50 inches (1033 millibars) and the temperature is 56°F (13°C), what is the correct reading at 55°N, 150°W?
N a. 30.42 inches (1030 millibars) Y b. 30.45 inches (1031 millibars) N c. 30.50 inches (1032 millibars) N d. 30.53 inches (1033 millibars) 588: You are underway on course 050°T and your maximum speed is 10 knots. The eye of a hurricane bears 100°T, 90 miles from your position. The hurricane is moving towards 285°T at 19 knots. If you maneuver at 10 knots to avoid the hurricane, what could be the maximum CPA?
N a. 39 miles N b. 45 miles Y c. 53 miles N d. 59 miles 643: When using the radar for navigating __________.
N a. the best fix is obtained by using a tangent bearing and a range N b. and using two radar ranges for a fix, the objects of the ranges should be close to reciprocal bearings Y c. and using ranges, the most rapidly changing range should be measured last N d. and crossing a radar range of one object with the visual bearing of a second object, the two objects should be 80° to 110° apart 669: It is desirable that a vessel encountering hurricane or typhoon conditions sends weather reports to the closest meteorological service at least every __________.
N a. hour Y b. 3 hours N c. 6 hours N d. 8 hours 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 798: A HYDROLANT warning would normally be sent for all of the following EXCEPT __________.
Y a. extinguishment of Robbins Reef Light in New York City's Upper Bay N b. unexploded ordinance in ocean waters at a depth of 78 fathoms (143 meters) N c. the presence of a large unwieldy tow in congested offshore water N d. a report of an overdue ship 812: You are informed of defects or changes in aids to navigation by __________.
N a. Local Notice to Mariners N b. Weekly Notice to Mariners N c. marine broadcasts Y d. All of the above 909: What is the average speed of movement of a hurricane prior to recurvature?
N a. 4 to 6 knots N b. 6 to 8 knots Y c. 10 to 12 knots N d. 15 to 20 knots 909: What is the average speed of movement of a hurricane prior to recurvature?
N a. 4 to 6 knots N b. 6 to 8 knots Y c. 10 to 12 knots N d. 15 to 20 knots 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 950: Where is the dangerous semicircle located on a hurricane in the Southern Hemisphere?
Y a. To the left of the storm's track N b. To the right of the storm's track N c. In the high pressure area N d. On the south side 964: The thin, whitish, high clouds composed of ice crystals, popularly known as "mares' tails" are __________.
Y a. cirrus N b. cirrocumulus N c. altostratus N d. nimbostratus 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 1024: The dew point is reached when the __________.
N a. temperature of the air equals the temperature of the seawater N b. atmospheric pressure is 14.7 lbs. per square inch N c. relative humidity reaches 50% Y d. air becomes saturated with water vapor 1149: You are entering port and have been instructed to anchor, as your berth is not yet available. You are on a SW'ly heading, preparing to drop anchor, when you observe the range lights, as shown, on your starboard beam. You should __________. (D047NG )
Y a. ensure your ship will NOT block the channel or obstruct the range while at anchor N b. drop the anchor immediately as the range lights mark an area free of obstructions N c. drop the anchor immediately as a change in the position of the range lights will be an indication of dragging anchor N d. NOT drop the anchor until the lights are in line 1195: A position that is obtained by applying estimated current and wind to your vessel's course and speed is a(n) __________.
N a. dead reckoning position N b. fix Y c. estimated position N d. None of the above 1221: On a chart, the characteristic of the light on a lighthouse is shown as flashing white with a red sector. The red sector __________.
N a. indicates the limits of the navigable channel Y b. indicates a danger area N c. is used to identify the characteristics of the light N d. serves no significant purpose 1428: The speed of sound in water is approximately __________.
N a. 1.5 times its speed in air N b. 2.5 times its speed in air N c. 3.5 times its speed in air Y d. 4.5 times its speed in air 1445: The planet Mars will have its greatest magnitude when at __________.
N a. conjunction Y b. opposition N c. east quadrature N d. west quadrature 1480: What is the definition of height of tide?
N a. The vertical difference between the heights of low and high water N b. The vertical difference between a datum plane and the ocean bottom N c. The vertical distance from the surface of the water to the ocean floor Y d. The vertical distance from the tidal datum to the level of the water at any time 1586: A green buoy has a yellow triangle on it. This is a(n) __________.
N a. information or regulatory buoy that has lateral significance N b. buoy that is off-station and is marked to warn mariners of its wrong position Y c. dual purpose marking used where the ICW and other waterways coincide N d. buoy that was set in error and will be replaced with a red nun buoy 1613: Where would you find information concerning the duration of slack water?
N a. Tide Tables Y b. Tidal Current Tables N c. American Practical Navigator N d. Sailing Directions 1615: The Illustration shows the symbols used on radio facsimile weather charts. Which symbol indicates snow? (D042NG )
N a. G N b. H Y c. M N d. N 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 1784: If your vessel were proceeding down river (descending), a green square marker with a green reflector border on the right bank would be a __________.
N a. mile board N b. dredging mark Y c. passing daymark N d. crossing daymark 1836: At evening stars, the first stars that should be observed are those with an azimuth in what quadrant?
N a. Southern N b. Western N c. Northern Y d. Eastern 1920: Because the actual center of some planets may differ from the observed center, the navigator applies a correction known as the __________.
Y a. phase correction N b. refraction correction N c. semidiameter correction N d. augmentation correction 2056: This illustration represents a fixed C of E lock and dam. What navigational light(s) is(are) exhibited at the position indicated by the letter C? (D038NG )
N a. One red light Y b. Two green lights N c. Three green lights N d. No lights 2122: A position that is obtained by using two or more intersecting lines of position taken at nearly the same time, is a(n) __________.
Y a. fix N b. running fix N c. estimated position N d. dead-reckoning position 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 2166: 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. One amber light Y b. Three red lights N c. Two red lights N d. One red light 2239: A flashing green light displayed at a single lock means that the lock is __________.
Y a. ready for entrance N b. ready for entrance, but gates cannot be closed completely N c. being made ready for entrance N d. not ready for entrance 2338: A group of stars which appear close together and form a striking configuration such as a person or animal is a __________.
N a. cluster N b. shower Y c. constellation N d. galaxy 2438: The radar control that reduces weak echoes out to a limited distance from the ship is the __________.
Y a. sensitivity time control (sea-clutter control) N b. receiver gain control N c. brilliance control N d. fast time constant (differentiator) 2460: You are on course 344°T and take a relative bearing of a lighthouse of 270°. What is the true bearing to the lighthouse?
N a. 016° N b. 074° N c. 090° Y d. 254° 2540: The distance between any two meridians measured along a parallel of latitude and expressed in miles is the __________.
N a. difference in longitude N b. mid-longitude Y c. departure N d. meridian angle 2738: While navigating in fog off a coastline of steep cliffs, you hear the echo of the ship's fog horn 3 seconds after the signal was sounded. What is the distance to the shore?
N a. 1100 yards N b. 872 yards Y c. 550 yards N d. 792 yards 2803: Some locations maintain a zone time of -13. What are the Greenwich time and date if the zone time and date are 0152, 10 January?
Y a. 1252, 9 January N b. 1452, 9 January N c. 0052, 11 January N d. 1452, 11 January 2868: You are inbound in a channel marked by a range. The range line is 309°T. You are steering 306°T and have the range in sight as shown. Which action should you take? (D048NG )
N a. Continue on the present heading until the range is in line then alter course to the right. Y b. Immediately alter course to the right to bring the range in line. N c. Immediately alter course to the left to bring the range in line. N d. Immediately alter course to 309°T if the range is closing. 2878: Given are the courses and speeds of 4 vessels. The navigator of which vessel would be required to know the actual time of meridian transit in order to take an accurate observation at LAN?
N a. C 356°T, Sp 5 knots N b. C 099°T, Sp 17 knots Y c. C 192°T, Sp 23 knots N d. C 278°T, Sp 6 knots 3031: Which symbol would indicate a large automated navigational buoy, such as those that have replaced some lightships? (D015NG )
N a. A Y b. B N c. C N d. D 3101: The typical operating range of automatic identification systems (AIS) at sea is nominally __________.
N a. 2 nm N b. 8 nm Y c. 20 nm N d. 40 nm