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.
116: Which wind results from a land mass cooling more quickly at night than an adjacent water area?
N a. Coastal breeze N b. Sea breeze Y c. Land breeze N d. Mistral 134: The recording fathometer produces a graphic record of the __________.
N a. bottom contour only up to depths of 100 fathoms Y b. depth underneath the keel against a time base N c. contour of the bottom against a distance base N d. depth of water against a distance base 467: At what time after 1400 EST (ZD +5), on 4 January 1983, will the height of the tide at Port Wentworth, GA, be 3.0 feet?
N a. 1612 N b. 1630 Y c. 1653 N d. 1718 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. 571: The Coast Guard Captain of the Port has excluded all traffic from a section of a port, while a regatta is taking place. The buoys marking this exclusion area will be __________.
N a. nun- or can-shaped to conform to the overall direction of navigation N b. yellow Y c. orange and white N d. marked with a spherical topmark 590: On 16 January 1981, you take a sight of a star. The sextant altitude (hs) is 4°33.0'. The temperature is -10°C, and the barometer reads 992 millibars. The height of eye is 42 feet. The index error is 1.9' off the arc. What is the observed altitude (Ho)?
N a. 4°10.2' N b. 4°14.3' Y c. 4°17.0' N d. 4°24.1' 623: An indirect radar echo is caused by a reflection of the main lobe of the radar beam off the observer's vessel. Which of the following is NOT a characteristic of indirect echoes?
N a. Their bearing is almost constant, even when the true bearing of the contact changes appreciably. Y b. They always appear on a bearing of 90°From the true bearing of the contact. N c. The indirect echoes usually appear in shadow sectors. N d. When plotted, their movements are usually abnormal. 634: What will cause the ARPA to emit a visual alarm, audible alarm, or both?
N a. An acquired target entering into a guard zone N b. A tracked target lost for one radar scan Y c. A tracked target entering your preset CPA-TCPA limits N d. A target being initially detected within a guard zone 655: The equator is __________.
Y a. the primary great circle of the Earth perpendicular to the axis N b. the line to which all celestial observations are reduced N c. the line from which a celestial body's altitude is measured N d. All of the above 711: In the IALA Maritime Buoyage System, a red and white vertically-striped buoy is used as a(n) __________.
Y a. safe water mark N b. cardinal mark N c. isolated danger mark N d. special mark not primarily used for navigation 744: A hand held instrument used to measure distances between objects and the ship is a __________.
N a. vernier N b. psychrometer N c. hygrometer Y d. stadimeter 747: The movement of water away from the shore or downstream is called a(n) __________.
N a. reversing current Y b. ebb current N c. flood current N d. slack current 766: Which position includes the effects of wind and current?
N a. Dead reckoning position N b. Leeway position N c. Set position Y d. Estimated position 846: Weather systems in the middle latitudes generally travel from __________.
N a. east to west N b. north to south Y c. west to east N d. None of the above 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. 890: If several navigational lights are visible at the same time, each one may be positively identified by checking all of the following EXCEPT what against the Light List?
N a. Rhythm N b. Period Y c. Intensity N d. Color 999: You are preparing a weather report form, WS Form B-80. Three-quarters of the sky is covered with clouds, and the anemometer indicates that the apparent wind is from 226° relative at 17.7 knots. You are on course 020°T at 8 knots. How should you encode group Nddff? (D041NG )
N a. 80208 N b. 72218 N c. 72318 Y d. 62324 1008: The Light List indicates that a light has a nominal range of 18 miles and is 38 feet high. If the visibility is 6 miles and your height of eye is 15 feet, at which distance will you sight the light?
N a. 18.0 nm N b. 14.8 nm Y c. 11.7 nm N d. 6.0 nm 1102: What is the approximate geographic range of Race Rock Light, NY, if your height of eye is 27 feet (8.2 meters)? Refer to "Reprints from the LIGHT LISTS AND COAST PILOTS" .
N a. 9.9 nm N b. 14.3 nm Y c. 15.7 nm N d. 17.4 nm 1116: When a cold air mass and a warm air mass meet, and there is no horizontal motion of either air mass, it is called a(n) __________.
N a. cold front N b. occluded front Y c. stationary front N d. warm front 1156: When cold air displaces warm air you have a(n) __________.
Y a. cold front N b. occluded front N c. stationary front N d. warm front 1163: The total magnetic effects which cause deviation of a vessel's compass can be broken down into a series of components which are referred to as __________.
N a. divisional parts Y b. coefficients N c. fractional parts N d. equations 1305: Complete information on weather broadcasts throughout the world is contained in __________.
Y a. Selected Worldwide Marine Weather Broadcasts N b. your local newspaper N c. the Notice to Mariners N d. the daily weather map 1364: The Sailing Directions are published in the Enroute format and the __________.
N a. Coastal editions N b. World Port Index N c. Pilot format Y d. Planning Guide 1375: The Moon rises earlier on succeeding days when the __________.
N a. retardation effect of the revolution of the Moon is greater than the effect due to change of declination Y b. effect due to change of declination is larger than that due to revolution N c. the revolution effect and the declination effect act in the same direction N d. the Moon is on the equator and the revolution effect is at a maximum 1393: The directive force of a gyrocompass __________.
N a. increases with latitude, being maximum at the geographic poles Y b. decreases with latitude, being maximum at the geographic equator N c. is greatest when a vessel is near the Earth's magnetic equator N d. remains the same at all latitudes 1416: Radiation fog __________.
N a. always forms over water Y b. is formed by a temperature inversion N c. is thinnest at the surface N d. dissipates during the evening 1477: The wind in the vicinity of Nantucket Shoals Light has been southerly at an average speed of 23 knots. The predicted set and drift of the rotary tidal current are 225° at 0.8 knot. What are the set and drift of the current you can expect at Nantucket Shoals Light?
N a. 025° at 1.8 knots N b. 218° at 1.1 knots Y c. 235° at 0.5 knot N d. 247° at 0.7 knot 1488: What defines a great circle?
N a. A curved line drawn on a Mercator Chart N b. A course line that inscribes a loxodromic curve Y c. The shortest distance between any two points on the earth N d. The smallest circle that can be drawn on the face of a sphere 1520: The diurnal inequality of the tides is caused by __________.
Y a. the declination of the Moon N b. changing weather conditions N c. the Moon being at apogee N d. the Moon being at perigee 1564: What is a characteristic of cardinal marks?
Y a. Light rhythms indicating directional orientation N b. Vertical stripes N c. Square or triangular topmarks N d. Number-letter combinations for identification 1602: Most modern Loran-C receivers automatically detect secondary station blink which __________.
N a. indicates the station is transmitting normally N b. automatically shuts down the receiver Y c. triggers alarm indicators to warn the operator N d. causes the receiver to shift automatically to another Loran chain 1676: Lighted information markers show __________.
N a. green lights Y b. white lights N c. yellow lights N d. red lights 1696: Two well-developed high pressure areas may be separated by a __________.
N a. hill of low pressure Y b. trough of low pressure N c. valley of low pressure N d. ridge of low pressure 1736: Which statement is FALSE concerning the dangerous semicircle of a hurricane?
N a. The actual wind speed is increased by the forward movement of the storm along its track N b. the direction of the wind and the sea might carry a vessel directly into the storm's path N c. The seas are higher Y d. The rain is heavier 1908: What is the brightest navigational planet?
N a. Saturn N b. Jupiter N c. Mars Y d. Venus 1936: The parallel of latitude at 66°33'N is the __________.
N a. Tropic of Cancer N b. Tropic of Capricorn Y c. Arctic Circle N d. ecliptic 1984: When a dual purpose marking is used, the mariner following the Intracoastal Waterway should be guided by the __________.
N a. color of the aid N b. shape of the aid N c. color of the top band Y d. shape of the yellow mark 2179: A vessel is heading magnetic northwest and its magnetic compass indicates a heading of 312°. The quadrantal spheres are arranged athwartships. What action should be taken to remove this error during compass adjustment?
N a. If the quadrantal spheres are all of the way in, replace them with larger ones. N b. If the quadrantal spheres are all of the way out, remove one of the spheres. N c. If the quadrantal spheres are all of the way out, move the spheres in. Y d. If the quadrantal spheres are all of the way out, replace them with smaller spheres. 2188: A vessel is heading magnetic north and its magnetic compass indicates a heading of 003°. What action should be taken to remove this error during compass adjustment?
Y a. If the red ends are to starboard the athwartships magnets should be lowered. N b. If the blue ends are forward the fore-and-aft magnets should be raised. N c. If the red ends are to starboard and the tray is at the top add some athwartships magnets. N d. If the blue ends are aft the fore-and-aft magnets should be raised. 2232: A vessel is heading magnetic north and its magnetic compass indicates a heading of 003°. Which action should be taken to remove this error during compass adjustment?
N a. If the red ends are to starboard you should raise the athwartships tray. Y b. If the red ends are to starboard, and the athwartships tray is at the bottom, you should remove some magnets. N c. If the red ends are to port, and the athwartships tray is at the top, you should reverse the magnets. N d. If the red ends are to port, and the athwartships tray is at the top, you should lower the tray. 2237: A lighted buoy to be left to starboard, when entering a U.S. port from seaward, shall have a __________.
N a. light characteristic of Morse (A) N b. white light N c. green light Y d. red light 2324: Deneb is found in what constellation?
Y a. Cygnus N b. Pegasus N c. Ursa Major N d. Andromeda 2434: 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 red ends of the magnets are aft you should lower the fore-and-aft tray. Y b. If the red ends of the magnets are forward, and the fore-and-aft tray is at the bottom, you should remove some magnets. N c. If the red ends of the magnets are to port you should raise the athwartships tray. N d. If the red ends of the magnets are to port, and the athwartships tray is at the top, you should reverse the magnets. 2468: Under the U.S. Aids to Navigation System on the Western Rivers, the buoys marking the starboard side of the channel when going upstream will be __________.
N a. black Y b. red N c. green N d. yellow 2514: Sidereal time is NOT used __________.
N a. as the basis for star charts N b. to enter a star finder N c. in sight reduction using Pub 249 Y d. in sight reductions of planet observations 2614: What is the equivalent of 4°36' in time units?
N a. 9 min. 12 sec. N b. 14 min. 36 sec. N c. 15 min. 36 sec. Y d. 18 min. 24 sec. 2658: You must draw a plotting sheet covering latitudes 45°N to 49°N and longitudes 179°E to 178°W. If the distance between each degree of longitude is 5 3/4 inches, what is the distance between latitude 45°N and latitude 49°N?
N a. 33.1 inches N b. 33.3 inches Y c. 33.6 inches N d. 33.9 inches 2689: The letter D in illustration D006NG represents __________. (D006NG )
Y a. geometrical horizon N b. visible horizon N c. celestial horizon N d. sensible horizon 2695: You are plotting a running fix in an area where there is a determinable current. How should this current be treated in determining the position?
N a. The drift should be added to the ship's speed. N b. The current should be ignored. Y c. The course and speed made good should be determined and used to advance the LOP. N d. The set should be applied to the second bearing. 2746: What is used to measure wind velocity?
N a. Psychrometer N b. Barometer N c. Wind sock Y d. Anemometer 2777: A sailing chart could have a scale of __________.
N a. not more than 1:25,000 N b. 1:35,000 N c. 1:100,000 Y d. 1:700,000 2826: You take a bearing of 043° and 169° of two objects. What bearing of a third object will give the best fix?
N a. 356° Y b. 102° N c. 144° N d. 201° 2836: The correction tables in the front of the Nautical Almanac for use with sun sights do NOT include the effects of __________.
N a. mean refraction N b. parallax N c. semidiameter Y d. irradiation 2875: A harbor chart could have a scale of __________.
N a. not more than 1:25,000 Y b. 1:35,000 N c. 1:150,000 N d. not less than 1:500,000 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 2974: What daymark shape is used in the lateral system?
N a. Semicircle Y b. Triangle N c. Pentagon N d. Diamond 2974: What daymark shape is used in the lateral system?
N a. Semicircle Y b. Triangle N c. Pentagon N d. Diamond 3014: 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 5.5 knots Y b. C 162°T, Sp 27 knots N c. C 095°T, Sp 30 knots N d. C 268°T, Sp 22 knots 3042: How long would a steady wind need to blow in order to create a wind driven current?
N a. 2 hours N b. 6 hours Y c. 12 hours N d. 18 hours