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.
62: Charted depth is the __________.
N a. vertical distance from the chart sounding datum to the ocean bottom, plus the height of tide Y b. vertical distance from the chart sounding datum to the ocean bottom N c. average height of water over a specified period of time N d. average height of all low waters at a place 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 161: How is a safe water mark, that can be passed close aboard on either side, painted and lighted?
N a. Black and white stripes with an interrupted quick flashing light N b. Black and red stripes with a Morse (A) light N c. Black and red stripes with an interrupted quick flashing light Y d. Red and white stripes with a Morse (A) light 235: When the equation of time is taken from the Nautical Almanac for use in celestial navigation, it is used to determine __________.
N a. zone time N b. sunrise Y c. time of local apparent noon N d. local mean time 244: To make sure of getting the full advantage of a favorable current, you should reach an entrance or strait at what time in relation to the predicted time of the favorable current?
N a. One hour after the predicted time N b. At the predicted time N c. 30 minutes before flood, one hour after an ebb Y d. 30 minutes before the predicted time 265: It is 1200 local time for an observer at 54°E longitude. Which statement is TRUE?
N a. It is afternoon at Greenwich. N b. It is midnight at 126°E longitude. Y c. The observer is in time zone -4. N d. All of the above are true. 298: A great circle crosses the equator at 173°E. It will also cross the equator at what other longitude?
Y a. 7°W N b. 73°E N c. 73°W N d. 173°W 310: Which sextant shown has an index error of 3'30" off the arc? (D050NG )
N a. A Y b. B N c. C N d. D 321: Which buoy may be even numbered?
N a. Mid-channel buoy Y b. Unlighted nun buoy N c. Lighted green buoy N d. All of the above 329: The symbols shown are used on radio facsimile weather charts. Which symbol indicates a weather boundary? (D042NG )
N a. I N b. H N c. G Y d. F 472: Which conic projection chart features straight lines which closely approximate a great circle?
N a. Polyconic Y b. Lambert conformal N c. Orthographic N d. Stereographic 485: A phase correction is applied to observations of __________.
N a. the Sun N b. stars Y c. planets N d. All of the above 522: All straight lines represent great circle tracks on a chart based on a(n) __________.
N a. Mercator projection N b. polyconic projection N c. orthographic projection Y d. gnomonic projection 547: On 2 November 1983, at 1630 EST (ZD +5), what will be the predicted height of tide at Fulton, FL?
Y a. 2.8 feet (0.8 meters) N b. 3.4 feet (1.0 meters) N c. 4.2 feet (1.3 meters) N d. 5.6 feet (1.7 meters) 594: Barometers are calibrated at a standard temperature of __________.
N a. 0°F Y b. 32°F N c. 60°F N d. 70°F 598: A great circle crosses the equator at 141°E. It will also cross the equator at what other longitude?
N a. 180°E N b. 41°E N c. 141°W Y d. 39°W 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' 849: The Light List shows that a navigational light has a nominal range of 12 miles and a height above water of 25 feet (7.6 meters). Your height of eye is 30 feet (9.1 meters) and the visibility is 0.5 mile. At what approximate range will you first sight the light?
N a. 0.5 mile Y b. 1.4 miles N c. 5.2 miles N d. 12.0 miles 876: A generally circular low pressure area is called a(n) __________.
Y a. cyclone N b. anticyclone N c. cold front N d. occluded front 883: When changing from a compass course to a true course you should apply __________.
N a. variation N b. deviation Y c. variation and deviation N d. a correction for the direction of current set 886: The circulation around a low pressure center in the Northern Hemisphere is __________.
Y a. counterclockwise N b. variable N c. clockwise N d. anticyclonic 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 938: If within 500 yards (460m) of a Northern Right Whale you are lawfully obligated to __________.
N a. turn away from the whale and leave at full speed Y b. turn away from the whale and leave at slow speed N c. slow to bare steerageway until the whale swims away N d. stop the vessel and sound repeated blasts on the ship's whistle to scare the whale away 941: While preparing to enter a Brazilian port, you see ahead a red and green horizontally-striped buoy. The upper band is red. What action should you take?
N a. Alter course to leave the buoy to port. Y b. Alter course to leave the buoy to starboard. N c. Pass the buoy close aboard on either side. N d. Pass the buoy well clear on either side. 965: In order for a star to be used for a sight at lower transit, the star must __________.
Y a. be circumpolar N b. have a declination equal to or greater than your latitude N c. have a GHA of 180° N d. have the SHA equal to or less than the LHA 1003: The quadrantal spheres are used to __________.
Y a. remove deviation on the intercardinal headings N b. remove deviation on the cardinal compass headings N c. remove heeling error N d. compensate for induced magnetism in vertical soft iron 1005: The refraction correction table given in the Nautical Almanac is based on a standard or average atmospheric density with a temperature of 50°F (10°C) and atmospheric pressure of __________.
N a. 29.72 inches (1006 millibars) Y b. 29.83 inches (1010 millibars) N c. 29.89 inches (1012 millibars) N d. 29.93 inches (1014 millibars) 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 1184: Your position X is at LAT 35°S. Which winds are you experiencing? (D009NG )
Y a. Northeasterly N b. Northwesterly N c. Southeasterly N d. Southwesterly 1253: The horizontal angle between the magnetic meridian and the north-south line of the magnetic compass is __________.
Y a. deviation N b. variation N c. compass error N d. dip 1313: Variation in a compass is caused by __________.
N a. worn gears in the compass housing Y b. magnetism from the earth's magnetic field N c. magnetism within the vessel N d. lack of oil in the compass bearings 1314: The Illustration shows the symbols used on radio facsimile weather charts. Which of these symbols indicates hail? (D042NG )
N a. N Y b. H N c. Q N d. F 1344: Which of the buoy symbols shown indicates a safe water mark? (D032NG )
Y a. D N b. C N c. B N d. A 1445: The planet Mars will have its greatest magnitude when at __________.
N a. conjunction Y b. opposition N c. east quadrature N d. west quadrature 1462: Altocumulus clouds are indicated by which number? (D039NG )
N a. 1 N b. 3 N c. 4 Y d. 5 1542: To find a magnetic course from a true course you must apply __________.
N a. magnetic anomalies (local disturbances) N b. deviation Y c. variation N d. deviation and variation 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 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 1578: The LMT of sunrise on the standard meridian is 0552. Your longitude is 99°15'E. What is your ZT of sunrise?
N a. 0512 N b. 0529 N c. 0552 Y d. 0615 1610: When the navigational channel passes under a fixed bridge, the edges of the channel are marked on the bridge with what lights?
Y a. Red lights N b. Three white lights in a vertical line N c. Red lights on the LDB and green lights on the RDB N d. Yellow lights 1647: Cumulonimbus clouds are formed by __________.
Y a. vertical air movements N b. heavy rainstorms N c. horizontal air movements N d. any movement of moist air 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 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 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) 2008: What term is used to describe a tank barge constructed with the structural framing outside the cargo tank and the cargo tank plating separated from the shell plating?
N a. Shell plated Y b. Double hull N c. Hopper type N d. Independent tank 2112: Vessels regularly navigating rivers above Cairo, Illinois, shall at all times have on board a copy of __________.
N a. U.S. Coast Pilot Y b. U.S. Army Corps of Engineers Regulations (Blue Book) N c. Nautical Almanac for the year N d. Light List Vol. V 2261: You determine your vessel's position by taking a range and bearing to a buoy. Your position will be plotted as a(n) __________.
N a. running fix N b. fix N c. dead-reckoning position Y d. estimated position 2319: In low latitudes, the new Moon will always rise at about __________.
Y a. sunrise N b. 1200 LMT N c. sunset N d. 2400 LMT 2335: The Light List indicates that a light has a nominal range of 13 miles and is 36 feet high. If the visibility is 17 miles and your height of eye is 25 feet, at what approximate distance will you sight the light?
N a. 10.0 miles Y b. 12.9 miles N c. 14.2 miles N d. 17.0 miles 2534: You must construct a Mercator plotting sheet on a piece of paper measuring 26" by 30". The area includes latitude 28°15'N to 35°45'N and longitude 174°00'E to 178°00'W. Allow a three-quarter inch neat line on all sides. What is the maximum distance between each degree of longitude that will permit the area of the plotting sheet to be drawn within the stated limitation?
N a. 2.76 inches N b. 2.92 inches Y c. 3.06 inches N d. 3.19 inches 2594: At McAlpine L & D, normal upper pool elevation is 420.0 feet (130.8 meters) MSL, equal to 12.0 feet (3.7 meters) on the upper gage. The vertical clearance at the Clark Memorial Highway bridge is 72.6 feet (22.1 meters) above normal pool. What is the clearance if the gage reads 10.6 feet (3.2 meters)?
N a. 84.6 feet (25.8 meters) N b. 83.2 feet (25.4 meters) Y c. 74.0 feet (22.6 meters) N d. 62.0 feet (18.9 meters) 2654: What is the equivalent of 5°54' in time units?
N a. 20 min. 16 sec. Y b. 23 min. 36 sec. N c. 25 min. 54 sec. N d. 30 min. 27 sec. 2707: You will find information about the duration of slack water in the __________.
Y a. Tidal Current Tables N b. Tide Tables N c. American Practical Navigator N d. Sailing Directions 2720: When pushing barges ahead close to a steep revetment where there is no current, what is MOST likely to occur?
N a. The stern of the towboat will tend to sheer away from the revetment. N b. Your speed over the ground will increase. Y c. The head of the tow will tend to sheer away from the revetment. N d. All of the above 2738: While navigating in fog off a coastline of steep cliffs, you hear the echo of the ship's fog horn 3 seconds after the signal was sounded. What is the distance to the shore?
N a. 1100 yards N b. 872 yards Y c. 550 yards N d. 792 yards 2741: A general chart could have a scale of __________.
Y a. 1:200,000 N b. 1:1,000,000 N c. 1:50,000 N d. not more than 1:25,000 2978: Where do you find the semidiameter correction to be used to correct sextant observations of the stars?
N a. It is included in the altitude corrections inside the front cover of the Nautical Almanac. N b. Table 25 in Bowditch contains the correction. N c. A correction of -0.5' should be applied to all star sights. Y d. No semidiameter correction is used. 2998: While navigating in fog off a coastline of steep cliffs, you hear the echo of the ships fog horn 3 1/2 seconds after the signal was sounded. What is the distance to the shore?
Y a. 640 yards N b. 480 yards N c. 315 yards N d. 143 yards 3075: Chart information details to be used in ECDIS should be the latest edition of information originated by a government-authorized hydrographic office and conform to the standards of (the) __________.
N a. International Maritime Organization Y b. International Hydrographic Organization N c. NASA N d. US Coast Guard 3087: With respect to failure warnings and status indications, GPS receivers should provide, at a minimum, __________.
Y a. a warning of loss of position N b. a cross-track error alarm N c. an indication of a change in satellite configuration N d. an alarm if engine speed is suddenly reduced