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.
90: When the moon is new or full, which type of tides occur?
N a. Neap Y b. Spring N c. Diurnal N d. Apogean 90: When the moon is new or full, which type of tides occur?
N a. Neap Y b. Spring N c. Diurnal N d. Apogean 142: Which nautical charts are intended for coastwise navigation outside of outlying reefs and shoals?
N a. Approach charts Y b. General charts N c. Sailing charts N d. Coastal charts 517: On 5 March 1983, at 0630 EST (ZD +5), what will be the predicted height of tide at Ocracoke, Ocracoke Inlet, NC?
Y a. 0.1 foot N b. 1.2 feet N c. 1.9 feet N d. 2.3 feet 577: Your vessel has a draft of 24 feet. On 7 April 1983 you wish to pass over a temporary obstruction near Lovell Island, MA, that has a charted depth of 22 feet. Allowing for a safety margin of 3.1 feet under your keel, what is the earliest time after 0100 EST (ZD +5) that this passage can be made?
N a. 0248 N b. 0304 Y c. 0342 N d. 0356 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 636: Tropical cyclones are classified by form and intensity. Which system does not have closed isobars?
N a. Hurricane Y b. Tropical disturbance N c. Tropical depression N d. Cyclone 658: Monsoons are characterized by __________.
N a. light, variable winds with little or no humidity N b. strong, gusty winds that blow from the same general direction all year Y c. steady winds that reverse direction semiannually N d. strong, cyclonic winds that change direction to conform to the passage of an extreme low pressure system 665: 17 degrees of latitude is equal to __________.
N a. 68 miles N b. 510 miles Y c. 1020 miles N d. 4080 miles 836: In North America the majority of the weather systems move from __________.
N a. north to south N b. south to north N c. east to west Y d. west to east 896: The wind direction around a low pressure area in the Northern Hemisphere is __________.
N a. clockwise and inward N b. clockwise and outward Y c. counterclockwise and inward N d. counterclockwise and outward 939: That half of the hurricane to the right hand side of its track (as you face the same direction that the storm is moving) in the Northern Hemisphere is called the __________.
N a. windward side N b. leeward side N c. safe semicircle Y d. dangerous semicircle 966: Most high pressure areas in the United States are accompanied by __________.
N a. precipitation Y b. clear, cool weather N c. humid, sticky weather N d. cool fogs 993: When crossing the magnetic equator the __________.
N a. Flinders bar should be inverted Y b. heeling magnet should be inverted N c. the quadrantal spheres should be rotated 180° N d. Flinders bar should be moved to the opposite side of the binnacle 993: When crossing the magnetic equator the __________.
N a. Flinders bar should be inverted Y b. heeling magnet should be inverted N c. the quadrantal spheres should be rotated 180° N d. Flinders bar should be moved to the opposite side of the binnacle 1016: A source of an air mass labeled mTw is __________.
N a. the equator Y b. the Gulf of Mexico N c. Alaska N d. Canada 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 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 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 1101: In the North Sea area, you sight a buoy showing an uninterrupted quick-flashing white light. Which of the four topmarks shown will this buoy be fitted with under the IALA Buoyage system? (D031NG )
N a. A Y b. B N c. C N d. D 1109: You are on course 146°T. To check the speed of your vessel you should observe a celestial body on which bearing?
N a. 000° N b. 056° N c. 090° Y d. 146° 1153: Heeling error is defined as the change of deviation for a heel of __________.
N a. 2°While the vessel is on an intercardinal heading Y b. 1°While the vessel is on a compass heading of 000° N c. 2° and is constant on all headings N d. 1° while the vessel is on a compass heading of 180° 1172: Which position shown would likely have stratus or stratocumulus clouds, occasional light drizzle, steady southerlies around 10 knots, and steady temperatures? (D049NG )
N a. B N b. C N c. D Y d. E 1328: What will be the velocity of the tidal current in Bolivar Roads, Texas, at a point 0.5 mile north of Ft. Point, on 23 November 1983 at 0330 CST (ZD +6)?
Y a. Slack water N b. 0.8 kt N c. 1.2 kts N d. 3.4 kts 1342: An occluded front on a weather map is colored __________.
N a. blue line Y b. purple line N c. dashed blue line N d. alternate red and blue line 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 1458: When navigating coastwise and hurricane warnings are received, you should __________.
N a. call the Coast Guard to request further information N b. call the NWS for further information N c. just begin to react and make plans Y d. have battened down and be heading for the nearest port of refuge 1483: The most accurate method of determining gyrocompass error while underway is by __________.
Y a. comparing the gyro azimuth of a celestial body with the computed azimuth of the body N b. comparing the gyro heading with the magnetic compass heading N c. determining from the chart the course made good between celestial fixes N d. It cannot be determined accurately at sea due to drift of unknown currents. 1487: At the approaches to Savannah, GA, with the wind coming out of the west, the wind-driven current will be flowing approximately __________.
Y a. 080° N b. 100° N c. 260° N d. 280° 1491: You are on course 138°T. To check the latitude of your vessel you should observe a celestial body on which bearing?
N a. 138° N b. 270° N c. 318° Y d. 000° 1493: You are running parallel to the coast and estimate that the current is against you. In plotting a running fix using bearings from the same object on the coast, the greatest safety margin from inshore dangers will result if what speed is used to determine the fix?
Y a. Minimum speed estimate N b. Maximum speed estimate N c. Average speed estimate N d. A running fix should not be used under these conditions. 1534: You are preparing a weather report form, WS Form B-80. Your position is LAT 22°31'S, LONG 138°19'W. How would this be encoded? (D041NG )
N a. LAT 22.5°S, LONG 138.3°W Y b. 99225, 51383 N c. L2231, 53819 N d. 2231S, 5383W 1567: Buoys and day beacons exhibiting a yellow triangle or square painted on them are used __________.
N a. in minor harbors where the controlling depth is 10 feet (3 meters) or less N b. on isolated stretches of the ICW to mark undredged areas Y c. where the ICW and other waterways coincide N d. at particularly hazardous turns of the channel 1569: Three or four feet of the total height of a storm surge in a hurricane can be attributed to __________.
N a. an increase in temperature N b. an increase in the wave period N c. the wind velocity Y d. the decrease in atmospheric pressure 1594: The Illustration shows the symbols used on radio facsimile weather charts. The symbol indicated at letter "P" represents __________. (D042NG )
N a. snow N b. hail Y c. freezing rain N d. sleet 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 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 1639: Sextant D reads __________. (D043NG )
N a. 30°47.5' N b. 29°47.5' Y c. 29°42.5' N d. 29°41.6' 1667: Air masses near the earth's surface __________.
N a. move from areas of high pressure to areas of low pressure N b. are deflected by the earth's rotation in both hemispheres N c. are deflected by the "Coriolis effect" Y d. All of the above 1722: Hurricanes may move in any direction. However, it is rare and generally of short duration when a hurricane in the Northern Hemisphere moves toward the __________.
N a. west or northwest N b. northeast Y c. southeast N d. north 1807: Which weather system produces strong cold winds called "Northers" during the winter months in the Gulf of Mexico?
N a. A polar maritime air mass Y b. A high pressure system N c. A cyclone N d. A low pressure system 1904: In the horizon system of coordinates what is equivalent to the parallels of declination of the celestial equator system?
N a. Vertical circles Y b. Parallels of altitude N c. Zenith distance N d. Azimuth angle 1974: Ocean currents are well defined and __________.
N a. create large waves in the direction of the current N b. change direction 360° during a 24 hour period Y c. remain fairly constant in direction and velocity throughout the year N d. are characterized by a light green color 2049: At morning stars, the first stars that should be observed are those with an azimuth in which quadrant?
Y a. Eastern N b. Southern N c. Western N d. Northern 2145: 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 N c. Green over amber (yellow) Y d. Red over amber (yellow) 2162: The new Moon cannot be seen because the Moon is __________.
N a. in the opposite direction of the Sun N b. below the horizon Y c. between the Earth and the Sun N d. at quadrature 2171: 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 N b. One red light N c. Two red lights Y d. Three red lights 2214: By convention, the Earth's south magnetic pole is colored __________.
N a. blue N b. black N c. white Y d. red 2301: The letter C in illustration D006NG represents the __________.
Y a. celestial horizon N b. geoidal horizon N c. visible horizon N d. sensible horizon 2322: You have completed the magnetic compass adjustments on magnetic east and magnetic south. The vessel is now steady on magnetic north but the compass reads 356°. Which action should be taken?
N a. Use the fore-and-aft magnets and adjust the compass until it reads 358°. Y b. Use the athwartships magnets and adjust the compass until it reads 358°. N c. Use the fore-and-aft magnets and adjust the compass until it reads 000°. N d. Use the quadrantal spheres and adjust the compass until it reads 000°. 2322: You have completed the magnetic compass adjustments on magnetic east and magnetic south. The vessel is now steady on magnetic north but the compass reads 356°. Which action should be taken?
N a. Use the fore-and-aft magnets and adjust the compass until it reads 358°. Y b. Use the athwartships magnets and adjust the compass until it reads 358°. N c. Use the fore-and-aft magnets and adjust the compass until it reads 000°. N d. Use the quadrantal spheres and adjust the compass until it reads 000°. 2374: The largest of the navigational planets is __________.
N a. Mars N b. Venus Y c. Jupiter N d. Saturn 2416: An orange and white buoy indicating a vessel-exclusion area will be marked with what symbol?
N a. Open-faced diamond Y b. Diamond with a cross N c. Circle N d. Square 2490: A vertex of the navigational triangle is NOT located at the __________.
N a. elevated pole N b. celestial body N c. zenith Y d. coaltitude 2687: The letter B in illustration D006NG represents the __________.
N a. celestial horizon N b. visible horizon N c. sensible horizon Y d. geoidal horizon 2725: 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. estimated position N b. dead-reckoning position N c. running fix Y d. fix 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 3007: A rotary current sets through all directions of the compass. The time it takes to complete one of these cycles, in a locale off the East coast of the US, is approximately __________.
N a. 2 1/2 hours N b. 3 1/2 hours N c. 6 1/4 hours Y d. 12 1/2 hours 3021: Which information is found in the chart title?
N a. Chart number Y b. Chart sounding datum N c. Revision and edition date N d. Variation information 3041: The letter H in illustration D006NG represents the __________.
N a. refractive horizon N b. geoidal horizon N c. celestial horizon Y d. visible horizon