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.
6: Wind velocity varies __________.
N a. directly with the temperature of the air mass Y b. directly with the pressure gradient N c. inversely with the barometric pressure N d. inversely with the absolute humidity 46: What wind reverses directions seasonally?
Y a. Monsoon winds N b. Hooked trades N c. Jet stream N d. Secondary winds 103: In Loran-C the high accuracy of atomic time and frequency controls allows each station to operate __________.
N a. at higher frequencies Y b. on schedule, independently N c. at 1,975 kHz N d. in a multiplex phase 121: A safe water mark may be __________.
N a. vertically striped N b. spherical N c. showing a white light Y d. All of the above 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 170: Which of the buoy symbols in illustration D032NG indicates a safe water mark?
Y a. D N b. C N c. B N d. A 350: When making landfall at night, the light from a powerful lighthouse may sometimes be seen before the lantern breaks the horizon. This light is called the __________.
N a. diffusion N b. backscatter Y c. loom N d. elevation 396: Your vessel is on course 150°T, speed 17 knots. The apparent wind is from 40° off the starboard bow, speed 15 knots. What is the speed of the true wind?
N a. 9.0 knots N b. 10.2 knots Y c. 11.0 knots N d. 12.0 knots 397: The mean tide level at Peaks Island, ME, is __________.
N a. 1.8 feet (0.5 meters) N b. 2.5 feet (0.8 meters) N c. 3.2 feet (1.0 meters) Y d. 4.5 feet (1.4 meters) 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 506: You are to sail from Elizabethport, N.J., on 22 May 1983, with a maximum draft of 28 feet. You will pass over an obstruction in the channel near Sandy Hook that has a depth of 26.5 feet. The steaming time from Elizabethport to the obstruction is 1h 40m. What is the earliest time (ZD + 4) you can sail on the afternoon of 22 May and pass over the obstruction with 2 feet of clearance?
N a. 1454 N b. 1424 N c. 1405 Y d. 1342 513: You are radar scanning for a buoy fitted with a racon. Which radar screen represents the presentation you should expect on the PPI? (D017NG )
N a. A Y b. B N c. C N d. D 642: Which government agency publishes the U.S. Coast Pilot?
N a. Army Corps of Engineers N b. National Geospatial-Intelligence Agency Y c. National Ocean Service N d. U.S. Coast Guard 728: In the Bay of Fundy, during twilight, you a take sight of Mars. The sextant altitude (hs) is 03°35.5'. Your height of eye is 32 feet and there is no index error. The air temperature is -10°C and the barometer reads 1010 millibars. What is the observed altitude (Ho)?
N a. 03°14.5' Y b. 03°15.8' N c. 03°16.2' N d. 03°28.8' 871: Under the IALA-A Buoyage System, a buoy marking the starboard side of the channel when approaching from seaward must have a(n) __________.
N a. pillar shape Y b. green color N c. square topmark N d. even number 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 928: The position labeled "D" was plotted because __________. (D051NG )
Y a. a dead reckoning position is plotted for each course change N b. a dead reckoning position is plotted within 30 minutes of a running fix N c. the vessel's speed changed at 1125 N d. All of the above 946: The wind circulation around a high pressure center in the Northern Hemisphere is __________.
N a. counterclockwise and moving towards the high N b. counterclockwise and moving outward from the high N c. clockwise and moving towards the high Y d. clockwise and moving outward from the high 967: On an Atlantic Ocean voyage from New York to Durban, South Africa, you should expect the Agulhas Current to present a strong __________.
N a. offshore set N b. onshore set Y c. head current N d. fair or following current 1000: You are inbound in a channel marked by a range. The range line is 309°T. You are steering 306°T. The range appears as shown and is closing. Which action should you take? (D047NG )
Y a. Continue on course until the range is closed, then alter course to the right. N b. Continue on the present heading until the range is in line, then alter course to the left. N c. Immediately alter course to the right to bring the range in line. N d. Immediately alter course to 309°T to bring the range in line. 1029: Which would be the subject of a NAVAREA warning?
N a. A drifting buoy sighted in mid-ocean N b. Extinguishment of Wolf Trap Light located inside Chesapeake Bay N c. All military exercises on the high seas involving four or more vessels Y d. Off-air times of radio beacons when scheduled for routine maintenance 1074: As the temperature for a given mass of air increases, the __________.
N a. dew point increases N b. dew point decreases N c. relative humidity increases Y d. relative humidity decreases 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° 1173: When adjusting a magnetic compass for error, a deviation table should be made __________.
N a. before correcting for any deviation N b. after correcting for variation Y c. after adjusting the fore-and-aft and athwartships permanent magnets N d. before the quadrantal correctors are placed on the compass 1209: You are on course 201°T. To check the speed of your vessel you should observe a celestial body on which bearing?
N a. 090° N b. 111° N c. 180° Y d. 201° 1281: The time required for a lighted aid to complete a full cycle of light changes is listed in the Light List as the __________.
N a. set N b. frequency Y c. period N d. function 1288: Your vessel will be docking at Chester, PA, during the evening of 22 April 1983. The chart shows a depth of 20 feet (6.1 meters) at the pier. What will be the depth of water available at 2310 EST (ZD +5)?
N a. 19.2 feet (5.9 meters) N b. 20.8 feet (6.3 meters) Y c. 24.7 feet (7.5 meters) N d. 25.8 feet (7.9 meters). 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 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 1527: Your vessel is on course 270°T, speed 10 knots. The apparent wind is from 10° off the port bow, speed 30 knots. From which direction is the true wind?
N a. 345°T Y b. 255°T N c. 165°T N d. 075°T 1674: The letter D in illustration D006NG represents the __________.
N a. visible horizon Y b. geometrical horizon N c. celestial horizon N d. geoidal horizon 1715: The hurricane season generally occurs from __________.
N a. August to January N b. July to December Y c. June to November N d. January to June 1727: What enables you to estimate the bearing of a storm's center?
Y a. Buys Ballot's Law N b. An educated guess N c. Pascal's Law N d. The left-hand rule 1755: Which weather system produces strong cold winds called "Northers" during the winter months in the Gulf of Mexico?
N a. An anticyclone N b. A high pressure system N c. A cyclone Y d. Both A and B 1815: Which weather system produces strong cold winds called "Northers" during the winter months in the Gulf of Mexico?
Y a. An anticyclone N b. A polar maritime air mass N c. A cyclone N d. A low pressure system 1844: What is the relative bearing of an object sighted dead ahead?
N a. 180° N b. 090° N c. 015° Y d. 000° 1890: A vessel heading SSE is on a course of __________.
N a. 112.5° N b. 135.0° Y c. 157.5° N d. 180.0° 1940: The diameter of the Sun and Moon as seen from the Earth varies slightly but averages about __________.
N a. 1' N b. 52' Y c. 32' N d. 15.5' 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 2072: The Illustration represents a movable dam. If a bear trap is open what will be displayed at the lock to indicate this condition? (D037NG )
Y a. An amber light under a red light N b. A white square N c. A green triangle N d. A yellow pentagon 2167: 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 red light N b. Two red lights Y c. Three red lights N d. One amber light 2224: By convention, the north seeking ends of a compass' magnets are colored __________.
N a. black N b. blue Y c. red N d. white 2274: A vessel is heading magnetic east and its magnetic compass indicates a heading of 086°. What action should be taken to remove this error during compass adjustment?
N a. If the red ends of the magnets are to port you should lower the athwartships tray. N b. If the blue ends of the magnets are to port, and the athwartships tray is at the top, you should reverse the magnets. N c. If the red ends of the magnet are aft, and the fore-and-aft tray is at the top, you should add some more magnets. Y d. If the red ends of the magnets are aft you should lower the fore-and-aft tray. 2296: A variable star is one that __________.
Y a. exhibits a change in magnitude N b. has a changing declination N c. is increasing in SHA N d. is also known as a red giant 2308: The points where the Sun is at 0° declination are known as __________.
N a. solstices Y b. equinoxes N c. perigee N d. apogee 2379: The winter solstice is the point where the Sun is at __________.
N a. maximum declination north Y b. maximum declination south N c. 0° declination going to northerly declinations N d. 0° declination going to southerly declinations 2412: The permanent magnetism of a vessel may change in polarity due to __________.
N a. being moored for a long time on one heading Y b. being struck by lighting N c. steaming from the north magnetic hemisphere to the south magnetic hemisphere N d. loading a homogenous magnetic cargo such as steel plate, iron bars, etc. 2505: At the approaches to Savannah, GA, with the wind coming out of the west, the wind-driven current will be flowing approximately __________.
N a. 280° N b. 260° N c. 100° Y d. 080° 2539: Under the IALA cardinal system, a mark with quick white light showing 3 flashes every 10 seconds indicates that the safest water in the area is on the __________.
N a. north side of the mark N b. west side of the mark Y c. east side of the mark N d. south side of the mark 2546: A structure, usually made of stone, or cement pilings, which extends from the bank at approximately right angles to the current is called a __________.
Y a. dike N b. revetment N c. cutoff N d. crib 2673: A bluff bar is a bar __________.
N a. extending out from a bluff alongside the river N b. that tends to give a false indication of its position Y c. that has a sharp drop off into deep water N d. that is perpendicular to the current 2692: The dividing meridian between zone descriptions -2 and -3 is __________.
N a. 15°30'E N b. 30°00'E Y c. 37°30'E N d. 45°00'E 2704: The Light List shows a lighted aid to navigation on the right bank. This means that the light can be seen on the starboard side of a vessel __________.
N a. proceeding from seaward N b. crossing the river N c. ascending the river Y d. descending the river 2706: The following types of vessels are awaiting lockage on the upper Mississippi. Which type of vessel is normally passed through the lock first?
N a. Pleasure craft N b. Commercial towboats Y c. Commercial passenger vessels N d. Commercial fishing vessels 2716: Under the U.S. Aids to Navigation System on the Western Rivers, passing daymarks on the left descending bank are __________.
N a. green squares N b. green diamonds N c. red diamonds Y d. red triangles 2752: A daymark used to indicate the safe water in a channel will have which of the shapes shown? (D045NG )
N a. A N b. B Y c. C N d. D 2980: What volume of the Coast Guard Light List is used for the Mississippi River system?
N a. I N b. II N c. IV Y d. V 2988: The buoy indicated by the letter A is a __________. (D044NG )
N a. nun Y b. can N c. spar N d. pillar 3080: Which feature, when set to zero, might allow a GPS unit to have an accuracy equivalent to Precise Positioning Service receiver capability?
N a. Transit Y b. Selective Availability N c. Auto-correlation N d. Anti-spoofing 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.