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 65: The LMT of LAN is 1210. Your longitude is 70°30'E. Which time would you use to enter the Nautical Almanac to determine the declination of the Sun at LAN?
N a. 1842 N b. 1652 Y c. 0728 N d. 0652 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 157: Tropic tides are caused by the __________.
Y a. Moon being at its maximum declination N b. Moon crossing the equator N c. Sun and Moon both being near 0° declination N d. Moon being at perigee 290: The true wind is from 330°T, speed 6 knots. You want the apparent wind to be 30 knots from 10° on your port bow. To what course and speed must you change?
N a. Cn 240°, 28.0 knots N b. Cn 270°, 28.0 knots N c. Cn 180°, 30.0 knots Y d. Cn 090°, 32.5 knots 392: A pilot chart does NOT contain information about __________.
N a. average wind conditions Y b. tidal currents N c. magnetic variation N d. average limits of field ice 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 507: What will be the time after 1000 EST (ZD +5), on 4 March 1983, that the height of the tide at City Island, NY, will be 2.4 feet?
Y a. 1228 N b. 1240 N c. 1244 N d. 1248 508: Which statement about the chartlet is TRUE? (Soundings and heights are in meters) (D010NG )
Y a. There is a dangerous eddy southeast of Beito Island. N b. Maury lightship is visible for 17 miles. N c. The bottom to the south-southeast of the lightship is soft coral. N d. There is a 12-meter deep west of Beito Island and inside the 5-meter line. 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 554: A sling psychrometer is a(n) __________.
N a. type of cargo gear N b. instrument used in celestial navigation Y c. instrument used to measure relative humidity N d. instrument used to measure specific gravity 603: What is the approximate wave length of an X Band Radar operating on a frequency of approximately 9500 MHz?
Y a. 3 cm N b. 10 cm N c. 30 cm N d. 100 cm 612: Which statement is TRUE concerning a Mercator projection?
N a. Degrees of longitude decrease in length as latitude increases. Y b. The length of the meridians is increased to provide for equal expansion in all directions. N c. The mileage between the meridians is increased as the latitude increases. N d. All of the above 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 671: You sight a buoy fitted with a double-sphere topmark. If sighted at night, this buoy would show a __________.
N a. quick-flashing red light N b. quick-flashing green light Y c. flashing white light showing a group of two flashes N d. flashing red light showing a group of three flashes 672: You are planning to enter an unfamiliar U.S. port. Which publication provides information about channel depths, dangers, obstructions, anchorages, and marine facilities available in that port?
N a. American Practical Navigator N b. Notice to Mariners Y c. Coast Pilot N d. Sailing Directions 710: What is the FIRST sign of the existence of a well developed tropical cyclone?
N a. Gale force winds from the north Y b. An unusually long ocean swell N c. Steep, short-period waves and light wind N d. Thunderstorms and higher than usual humidity 773: What is the basic principle of the magnetic compass?
Y a. Magnetic materials of the same polarity repel each other and those of opposite polarity attract. N b. The Earth's magnetic lines of force are parallel to the surface of the Earth. N c. Magnetic meridians connect points of equal magnetic variation. N d. The compass needle(s) will, when properly compensated, lie parallel to the isogonic lines of the Earth. 791: Under the IALA Buoyage Systems, the topmark of a red and white vertically-striped buoy shall be __________.
N a. X-shaped N b. two black spheres Y c. a single red sphere N d. a single red cone 808: On a working copy of a weather map, a stationary front is represented by which color line?
N a. Red N b. Blue Y c. Alternating red and blue N d. Purple 855: Which condition exists at the summer solstice in the Northern Hemisphere?
N a. The north polar regions are in continual darkness. N b. The Northern Hemisphere is having short days and long nights. Y c. The Southern Hemisphere is having winter. N d. The Sun shines equally on both hemispheres. 912: The Light List Does NOT contain information on __________.
N a. the Global Positioning System (GPS) Y b. aeronautical lights useful for marine navigation N c. radio beacon systems N d. radio direction finder calibration stations 934: Clouds that form as small white flakes or scaly globular masses covering either small or large portions of the sky are __________.
N a. cirrus N b. cirrostratus N c. altostratus Y d. cirrocumulus 962: Chart legends which indicate a conspicuous landmark are printed in __________.
N a. underlined letters N b. boldfaced print N c. italics Y d. capital letters 979: Which kind of conditions would you observe as the eye of a storm passes over your vessel's position?
Y a. Huge waves approaching from all directions, clearing skies, light winds, and an extremely low barometer N b. Flat calm seas, heavy rain, light winds, and an extremely low barometer N c. Flat calm seas, heavy rain, light winds, and high pressure N d. Huge waves approaching from all directions, clearing skies, light winds, and high pressure 1007: When a current flows in the opposite direction to the waves, the wave __________.
N a. length is increased Y b. height is increased N c. velocity increases N d. length is unchanged 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 1081: On a voyage along the coast of France, you sight a buoy with the top marks as shown. You are required to steer __________. (D026NG )
N a. west of the buoy N b. east of the buoy Y c. south of the buoy N d. north of the buoy 1190: Which type of cloud is indicated by the number 2? (D039NG )
N a. Cumulus Y b. Cirrostratus N c. Stratocumulus N d. Altostratus 1284: The Sailing Directions (Enroute) contain information on all of the following EXCEPT __________.
Y a. ocean currents N b. outer dangers to navigation N c. tidal currents N d. major port anchorages 1291: The period of a lighted aid to navigation refers to the __________.
N a. date of construction or establishment N b. length of time between flashes of the light N c. time required for the longest flash of each cycle Y d. time required for the light to complete each cycle 1304: The distance to the nearest vertex from any point on a great circle track cannot exceed __________.
Y a. 5400 nautical miles N b. 5840 nautical miles N c. 6080 nautical miles N d. 10,800 nautical miles 1440: A mercurial barometer at sea is subject to rapid variations in height ("pumping") due to the pitch and roll of the vessel. To avoid this error, measurements of atmospheric pressure at sea are usually measured with a(n) __________.
N a. syphon barometer N b. cistern barometer Y c. aneroid barometer N d. fortin barometer 1485: The safest and most prudent procedure to follow while navigating in the vicinity of a tropical cyclone is to __________.
Y a. take positive steps to avoid it if possible N b. batten down and prepare to ride out the storm N c. continue to navigate farther from the coast N d. always navigate towards the coast by the most direct route 1492: You are planning a voyage from San Francisco to Japan. Which publication contains information on the ocean routes?
N a. Coast Pilot Y b. Sailing Directions (Planning Guide) N c. Sailing Directions (Enroute) N d. World Port Index 1515: An aneroid barometer on a boat should always be __________.
N a. located in an air-conditioned area N b. mounted in the passenger compartment N c. protected by a collision bulkhead Y d. permanently mounted 1521: To avoid error you should read the scale of an aneroid barometer with your eye placed __________.
N a. to the right of the pointer N b. to the left of the pointer Y c. directly in front of the pointer N d. slightly above the meniscus 1547: Which light combination does NOT indicate a navigational channel passing under a fixed bridge?
Y a. Red lights on the LDB and green lights on the RDB N b. Three white lights in a vertical line N c. Two green lights in a range under the span N d. A fixed red light on each pier at the channel edge 1593: Apparent altitude is sextant altitude corrected for __________.
N a. parallax and personal error Y b. inaccuracies in the reading and reference level N c. visibility and magnitude N d. All of the above are correct 1662: Fog generally clears when the __________.
N a. wind speed increases N b. wind direction changes N c. temperature increases Y d. All of the above 1691: Which of the following is associated with consistently high barometric pressure?
Y a. The horse latitudes N b. The doldrums N c. The prevailing westerlies N d. The trade winds 1701: Which general weather conditions should you expect to find in a low pressure system?
N a. Fair weather Y b. Precipitation and cloudiness N c. Scattered clouds at high elevations N d. Gradual clearing and cooler temperatures 1731: When your vessel is on or near the path of an approaching tropical storm the __________.
N a. wind direction remains steady N b. wind speed increases N c. barometer falls Y d. All of the above 1761: Chart legends which indicate a conspicuous landmark are printed in __________.
N a. italics N b. underlined letters Y c. capital letters N d. boldfaced print 1783: You can follow the approach of a dangerous cyclonic storm by inspecting __________.
N a. the National Weather Service Observing Handbook No.1, Marine Surface Observations Y b. a weather fax N c. the Coast Pilot or Sailing Directions N d. the sky overhead 1808: A white buoy with an open-faced orange diamond on it indicates __________.
Y a. danger N b. vessels are excluded from the area N c. the buoy is a mooring buoy N d. operating restrictions are in effect 1858: A white buoy with an orange cross within a diamond marked on it indicates __________.
N a. danger Y b. vessels are excluded from the area N c. an anchorage area N d. operating restrictions are in effect 1871: A lighted buoy to be left to starboard, when entering a U.S. port from seaward, shall have a __________.
N a. green light N b. white light Y c. red light N d. light characteristic of Morse (A) 1925: Above-normal tides near the center of a hurricane may be caused by the __________.
N a. high barometric pressure N b. jet stream Y c. storm surge N d. torrential rains 2113: Vessels regularly navigating rivers above Cairo, Illinois, shall at all times have on board a copy of __________.
Y a. U.S. Army Corps of Engineers Regulations (Blue Book) N b. Nautical Almanac for the year N c. Sailing Directions N d. Light List Vol. V 2288: A mean sun is used as the reference for solar time for three reasons. Which reason is NOT a cause for use of a mean sun?
N a. The motion of the apparent sun is along the ecliptic. Y b. Measurement of time is along the celestial equator. N c. The speed of the Earth's revolution is not constant. N d. There are variations in the Earth's rotational speed. 2482: When a vessel changes course from one cardinal heading to another cardinal heading while adjusting the compass, which action should be taken?
N a. The course change should be made rapidly to prevent transient induced magnetism while passing the intercardinal headings. Y b. After the new heading is reached, the vessel should steam on that course for at least two minutes before the adjustment. N c. During the course change, you should gently tap the compass to remove any error caused by friction on the pivot bearing. N d. After steadying on the new heading, the compass card should be slewed by a magnet and allowed to oscillate freely to remove any gaussin error. 2520: When correcting the sextant altitude to apparent altitude you are correcting for inaccuracies in the reference level and __________.
N a. the equivalent reading to the center of the body N b. the equivalent reading from the center of the Earth Y c. for inaccuracies in the instrument N d. the bending of the rays of light from the body 2572: The dividing meridian between zone descriptions -4 and -5 is __________.
N a. 60°00'E Y b. 67°30'E N c. 75°00'E N d. 60°00'W 2587: 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?
Y a. C 166°T, Sp 24 knots N b. C 013°T, Sp 7 knots N c. C 291°T, Sp 25 knots N d. C 112°T, Sp 4 knots 2629: In both regions of the IALA buoyage system, which topmark is used on a special mark? (D022NG )
N a. A N b. B N c. C Y d. D 2686: The standard time meridian for description +12 is __________.
N a. 172.5°E Y b. 180.0° N c. 172.5°W N d. 165.0°W 2698: You must draw a plotting sheet covering latitudes 38°N to 41°N and longitudes 179°E to 178°W. If the distance between each degree of longitude is 4 inches, what is the distance between latitude 38°N and latitude 41°N?
N a. 15.00 inches Y b. 15.49 inches N c. 15.75 inches N d. 16.25 inches 2742: A white diamond daymark with an orange border is a(n) __________.
N a. special mark Y b. information or regulatory mark N c. lateral aid on the intracoastal waterway N d. safe water mark 3004: While navigating in fog off a coastline of steep cliffs, you hear the echo of the ship's fog horn 4 seconds after the signal was sounded. What is the distance to the shore?
N a. 209 yards N b. 363 yards N c. 480 yards Y d. 730 yards