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.
96: A weather forecast states that the wind will commence veering. In the Northern Hemisphere this indicates that the wind will __________.
Y a. shift in a clockwise manner N b. shift in a counterclockwise manner N c. continue blowing from the same direction N d. increase in velocity 110: A millibar is a unit of __________.
N a. humidity N b. precipitation Y c. pressure N d. temperature 174: The position labeled D is a(n) __________. (D051NG )
N a. fix N b. running fix N c. estimated position Y d. dead reckoning position 210: The position labeled C is a(n) __________. (D051NG )
N a. fix Y b. running fix N c. estimated position N d. dead reckoning position 227: The class of tide that prevails in the greatest number of important harbors on the Atlantic Coast is __________.
N a. interval N b. mixed N c. diurnal Y d. semidiurnal 295: The difference (measured in degrees) between the GHA of the body and the longitude of the observer is the __________.
N a. right ascension Y b. meridian angle N c. SHA of the observer N d. zenith distance 323: The position accuracy of Loran-C degrades with increasing distance from the transmitting stations as __________.
N a. gains are made over the signal path Y b. a result of variation in propagation conditions N c. the frequency of the pulses increases N d. the stations shift pulses 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' 428: A buoy bears 178°T at 3000 yards (2700 meters). What is the course to make good to leave the buoy 100 yards (90 meters) to starboard?
N a. 174°T Y b. 176°T N c. 178°T N d. 180°T 460: When using horizontal sextant angles of three objects to fix your position, an indeterminate position will result in which situation?
N a. The objects lie in a straight line. N b. The vessel is inside of a triangle formed by the objects. N c. The vessel is outside of a triangle formed by the objects. Y d. A circle will pass through your position and the three objects. 578: At about GMT 1436, on 3 December 1981, the lower limb of the Moon is observed with a sextant having an index error of 2.5' on the arc. The height of eye is 32 feet. The sextant altitude (hs) is 3°38.8'. What is the observed altitude?
N a. Ho 4°18.6' Y b. Ho 4°29.1' N c. Ho 4°36.3' N d. Ho 4°42.2' 595: In the navigational triangle, the angle at the elevated pole is the __________.
Y a. meridian angle N b. altitude N c. right ascension N d. azimuth angle 667: The navigable semicircle of a typhoon in the Southern Hemisphere is the area __________.
N a. behind the typhoon, measured from 90° to 180°From each side of the storm's track Y b. to the right of the storm's track N c. ahead of the typhoon, measured from the storm's track to 90° on each side N d. measured from due south, counterclockwise 180° 674: When using an ARPA, what should you consider in order to evaluate the information displayed?
N a. The target vessel's generated course and speed are based solely on radar inputs. Y b. Navigational constraints may require a target vessel to change course. N c. The trial maneuver feature will automatically determine a course that will clear all targets. N d. You cannot determine if a small target has been lost due to sea return. 714: When using the ARPA in heavy rain, which action should you take?
N a. Increase the radar gain to pick up weak echoes through the rain. N b. Increase the STC setting to reduce close-in spurious signals. Y c. Navigate as though the effective range of the radar has been reduced. N d. Increase the range of the inner and outer guard rings. 764: Magnetic variation changes with a change in __________.
N a. the vessel's heading N b. sea conditions N c. seasons Y d. the vessel's position 824: An "atoll cloud" forming over an island due to heating of the land during the daytime would be which type?
N a. Cirrus Y b. Cumulus N c. Stratus N d. Nimbus 844: A cloud of marked vertical development (often anvil-shaped) would be classified as __________.
N a. cirrus N b. cirrocumulus N c. altocumulus Y d. cumulonimbus 955: The line of position determined from a sight with an observed altitude (Ho) of 88°45.0' should be __________.
N a. reduced to the meridian and plotted as a latitude line N b. calculated as a longitude line N c. plotted by using an intercept from an assumed position Y d. plotted as an arc around the GP of the body 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 1026: An air mass that has moved down from Canada would most likely have the symbols __________.
N a. mPk Y b. cPk N c. cTk N d. cTw 1038: You are preparing a weather report form, WS Form B-80. The dry bulb thermometer reads 54°F, and the wet bulb thermometer reads 50°F. How would you encode the air temperature groups in the report? (D041NG )
N a. 1054/, 2050/ Y b. 10122, 2008/ N c. 1054/, 2047/ N d. 054//, 047// 1050: The passing of a low pressure system can be determined by periodically checking the __________.
N a. thermometer N b. hygrometer Y c. barometer N d. anemometer 1056: The steepness of a cold front depends on __________.
N a. the direction of wind around the front Y b. its velocity N c. the temperature of the air behind the front N d. the precipitation generated by the front 1175: Solid green arrows on the main body of a pilot chart indicate __________.
N a. prevailing wind directions Y b. prevailing ocean current directions N c. probable surface current flow N d. shortest great circle routes 1207: What will be the velocity of the tidal current at New London Harbor Entrance, CT, at 1615 EST (ZD +5) on 26 December 1983?
Y a. 0.2 knot N b. 0.4 knot N c. 0.7 knot N d. 0.9 knot 1368: What area of the earth cannot be shown on a standard Mercator chart?
N a. Equator N b. Areas including both North and South latitudes Y c. North and South Poles N d. A narrow band along the central meridian. 1381: Geographic range is the maximum distance at which a light may be seen under __________.
N a. existing visibility conditions, limited only by the curvature of the Earth Y b. perfect visibility conditions, limited only by the curvature of the Earth N c. existing visibility conditions, limited only by the intensity of the light N d. perfect visibility conditions, limited only by interference from background lighting 1397: What will be the velocity of the tidal current at Port Jefferson Harbor Entrance, NY, at 1600 EST (ZD +5) on 23 December 1983?
N a. 0.9 knot Y b. 1.1 knots N c. 1.6 knots N d. 2.0 knots 1430: The Light List indicates that a light has a nominal range of 14 miles and is 42 feet high (12.8 meters). If the visibility is 6 miles and your height of eye is 20 feet (6.1 meters), at what approximate distance will you sight the light?
N a. 20.1 miles Y b. 10.0 miles N c. 7.6 miles N d. 6.0 miles 1459: In a tropical cyclone, in the Northern Hemisphere, a vessel hove to with the wind shifting counterclockwise is __________.
N a. ahead of the storm center N b. in the dangerous semicircle Y c. in the navigable semicircle N d. directly in the approach path of the storm 1484: You should plot your dead reckoning position at __________.
N a. every fix or running fix N b. every course change N c. every speed change Y d. All of the above are correct. 1585: The sidereal day begins when the __________.
Y a. first point of Aries is over the upper branch of the reference meridian N b. Sun is over the lower branch of the reference meridian N c. Sun is over the upper branch of the reference meridian N d. first point of Aries is over the lower branch of the reference meridian 1704: If the center of low pressure is due west of you in the Northern Hemisphere, which wind direction should you expect?
N a. South to west Y b. South to east N c. West to north N d. North to east 1771: Which type of precipitation is a product of the violent convection found in thunderstorms?
N a. Snow N b. Freezing Rain Y c. Hail N d. Sleet 1780: While in port, you can follow the approach of a dangerous cyclonic storm by inspecting __________.
N a. the Coast Pilot or Sailing Directions N b. the National Weather Service Observing Handbook No.1, Marine Surface Observations Y c. a newspaper N d. the sky overhead 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 1862: What is the relative bearing of an object broad on the starboard quarter?
N a. 090° N b. 105° Y c. 135° N d. 150° 1866: What term is used to describe a tank barge constructed with the structural framing inside the cargo tank and the side shell plating containing the cargo?
Y a. Single hull N b. Shell plated N c. Hopper type N d. Independent tank 1869: The illustration represents a fixed C of E lock and dam. What navigational light(s) is(are) exhibited at the position indicated by the letter B in the illustration? (D036NG )
N a. One red light N b. Two green lights N c. Three green lights Y d. No light 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) 2004: The velocity of the wind, its steady direction, and the amount of time it has blown determines a wind driven current's __________.
N a. temperature N b. density N c. deflection Y d. speed 2048: You are upbound approaching a lock and dam and see two green lights in a vertical line. This indicates __________.
Y a. the downstream end of an intermediate wall N b. that a double lockage is in progress N c. the downstream end of the land wall N d. the navigable pass of a fixed weir dam 2175: 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, which light(s) will be shown at D if the lock walls and piers are not awash?
N a. One amber light Y b. One red light N c. Two red lights N d. Three red lights 2234: 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?
N a. Move the quadrantal spheres closer to the compass N b. Raise the heeling magnet if the red end is up N c. Remove some of the Flinders bar Y d. Raise or lower the athwartship magnets 2234: 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?
N a. Move the quadrantal spheres closer to the compass N b. Raise the heeling magnet if the red end is up N c. Remove some of the Flinders bar Y d. Raise or lower the athwartship magnets 2304: The Moon is subject to four types of libration. Which of the following is NOT one of these types of libration?
N a. Libration in longitude N b. Diurnal libration Y c. Vertical libration N d. Libration in latitude 2349: The summer solstice is the point where the Sun is at __________.
Y a. maximum declination north N b. maximum declination south N c. 0° declination going to northerly declinations N d. 0° declination going to southerly declinations 2373: The vertical distance from the tidal datum to the level of the water is the __________.
N a. actual water depth N b. range of tide N c. charted depth Y d. height of tide 2458: In the U.S. Aids to Navigation System on the Western Rivers, the light characteristic of group flashing (2) is used for lights on __________.
N a. the right descending bank Y b. the left descending bank N c. preferred channel buoys N d. daymarks with no lateral significant 2466: On the Western Rivers, a vessel crossing a river must __________.
N a. only keep out of the way of a power-driven vessel descending the river N b. keep out of the way of any vessel descending the river Y c. keep out of the way of a power-driven vessel ascending or descending the river N d. keep out of the way of any vessel ascending or descending the river 2519: The standard time meridian for zone description -12 is __________.
N a. 165.0°E N b. 172.5°E Y c. 180.0° N d. 172.5°W 2668: You are approaching a drawbridge and have sounded the request-for-opening signal. The bridge has responded with five short blasts. What reply should you sound?
N a. None; No reply is required Y b. Five short blasts N c. Two prolonged blasts N d. One prolonged, one short blast 2674: In the U.S. Aids to Navigation System on the Western Rivers, a preferred channel buoy to be left to port while proceeding downstream will __________.
N a. have the upper band red N b. show a red light if lighted N c. have a characteristic of composite group flashing if lighted Y d. All of the above 2696: You must draw a plotting sheet covering latitudes 52°S to 56°S and longitudes 179°W to 175°E. If the distance between latitude 52°S to 56°S is 24 inches, what is the distance between the meridians of 1° of longitude?
N a. 3.2 inches Y b. 3.5 inches N c. 4.0 inches N d. 4.2 inches 2798: A can buoy is indicated by which letter in illustration D044NG?
Y a. A N b. B N c. C N d. D 2887: The letter B in illustration D006NG represents the __________.
N a. visible horizon N b. sensible horizon Y c. geoidal horizon N d. celestial horizon 3032: The direction in which a vessel is steered is the course. The path actually followed is the __________.
N a. route N b. track N c. heading Y d. course over the ground 3094: ECDIS must have the capability to preserve the record of the track for the previous __________.
Y a. 12 hours N b. 24 hours N c. 48 hours N d. 72 hours 3130: When may the automatic identification system (AIS) be switched off?
N a. At anytime as long as it is properly logged. Y b. At the Master's professional judgment. N c. Only when the vessel is at anchor or in port. N d. Under no circumstance.