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.
164: The part of a sextant mounted directly over the pivot of the index arm is the __________.
Y a. index mirror N b. horizon glass N c. micrometer drum N d. telescope 177: How many high waters usually occur each day on the East Coast of the United States?
N a. One Y b. Two N c. Three N d. Four 200: When navigating using GPS, what is an indicator of the geometry of the satellites that your receiver is locked onto?
Y a. Horizontal Dilution of Precision N b. Selective Availability N c. Doppler Shifting N d. Precision Coding 246: The consistent winds blowing from the horse latitudes to the doldrums are called the __________.
N a. prevailing westerlies N b. polar easterlies Y c. trade winds N d. roaring forties 291: A buoy marking a wreck will show a(n) __________.
Y a. white light FL (2) and a topmark of 2 black spheres N b. occulting green light and may be lettered N c. yellow light and will be numbered N d. continuous quick white light and may be numbered 316: According to Buys Ballot's law, when an observer in the Northern Hemisphere experiences a northwest wind, the center of low pressure is located to the __________.
Y a. northeast N b. west-southwest N c. northwest N d. south-southeast 447: On 27 April 1983, at 1105 DST (ZD +4), what will be the predicted height of tide at Falkner Island, CT?
Y a. 5.3 feet (1.6 m) N b. 5.6 feet (1.7 m) N c. 6.2 feet (1.9 m) N d. 6.8 feet (2.7 m) 519: The chart of a beach area shows a very flat slope to the underwater beach bottom. What type of breakers can be expected when trying to land a boat on this beach?
N a. Surging Y b. Spilling N c. Plunging N d. Converging 519: The chart of a beach area shows a very flat slope to the underwater beach bottom. What type of breakers can be expected when trying to land a boat on this beach?
N a. Surging Y b. Spilling N c. Plunging N d. Converging 601: White and orange buoys, if lighted, show which color light?
Y a. White N b. Orange N c. Red N d. Alternating yellow and white 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 646: You have determined that you are in the right semicircle of a tropical cyclone in the Northern Hemisphere. What action should you take to avoid the storm?
N a. Place the wind on the starboard quarter and hold that course. N b. Place the wind on the port quarter and hold that course. N c. Place the wind on the port bow and hold that course. Y d. Place the wind on the starboard bow and hold that course. 718: You are to sail from Elizabethport, NJ, 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 charted depth of 27 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 3 feet of clearance?
Y a. 1407 N b. 1331 N c. 1303 N d. 1242 719: You are on course 209°T. In order to check the longitude of your vessel, you should observe a celestial body on which bearing?
N a. 209° Y b. 270° N c. 299° N d. 000° 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 769: What does not contribute to the commercial GPS receiver position error?
N a. Satellite clock Y b. Ship's speed N c. Atmospheric/Ionospheric propagation N d. Satellites' orbits 829: 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 set should be applied to the second bearing. N c. The current should be ignored. Y d. The course and speed made good should be determined and used to advance the LOP. 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 892: When a buoy is in position only during a certain period of the year, where may the dates when the buoy is in position be found?
Y a. Light List N b. Notice to Mariners N c. On the chart N d. Coast Pilot 1006: An air mass is termed "warm" if __________.
N a. it is above 70°F Y b. the ground over which it moves is cooler than the air N c. it originated in a high pressure area N d. it originated in a low pressure area 1044: The dry-bulb temperature is 78°F and the wet-bulb temperature is 62°F. What is the relative humidity?
N a. 16% N b. 24% Y c. 39% N d. 79% 1069: What do the numbers on isobars indicate?
Y a. barometric pressure N b. temperature N c. rain in inches N d. wind speed 1099: You are enroute to assist vessel A. Vessel A is underway at 6 knots on course 133°T, and bears 343°T at 92 miles from you. What is the course to steer at 9 knots to intercept vessel A?
N a. 356° Y b. 003° N c. 022° N d. 038° 1115: Which light characteristic may be used on a special purpose mark?
Y a. Flashing N b. Occulting N c. Equal interval N d. Quick flashing 1129: The motion of celestial bodies relative to other celestial bodies is known as __________.
Y a. space motion N b. apparent motion N c. diurnal motion N d. actual motion 1149: You are entering port and have been instructed to anchor, as your berth is not yet available. You are on a SW'ly heading, preparing to drop anchor, when you observe the range lights, as shown, on your starboard beam. You should __________. (D047NG )
Y a. ensure your ship will NOT block the channel or obstruct the range while at anchor N b. drop the anchor immediately as the range lights mark an area free of obstructions N c. drop the anchor immediately as a change in the position of the range lights will be an indication of dragging anchor N d. NOT drop the anchor until the lights are in line 1152: When using GPS without Selective Availability, you may expect your horizontal accuracy to be better than __________.
N a. 3 meters Y b. 20 meters N c. 100 meters N d. 200 meters 1188: The magnitude of three stars is indicated. Which star is the brightest?
N a. Antares + 1.2 N b. Altair + 0.9 Y c. Vega + 0.1 N d. Cannot be determined; magnitude indicates size not brightness 1221: On a chart, the characteristic of the light on a lighthouse is shown as flashing white with a red sector. The red sector __________.
N a. indicates the limits of the navigable channel Y b. indicates a danger area N c. is used to identify the characteristics of the light N d. serves no significant purpose 1422: Cumulus clouds are indicated by what number in illustration D039NG? (D039NG )
N a. 3 N b. 5 N c. 6 Y d. 7 1465: The planet Venus can be observed in the morning before sunrise if it is well to the __________.
Y a. west of and higher than the Sun N b. west of and lower than the Sun N c. east of and higher than the Sun N d. east of and lower than the Sun 1539: You are steaming in the open ocean of the North Pacific between the Aleutian Chain and Hawaii. A warning broadcast indicates that an earthquake has occurred in the Aleutians and has generated a tsunami that is predicted to hit Hawaii. What action is necessary for the ship's safety?
N a. Calculate the tsunami's ETA at your position and turn to a course that will head into the Tsunami. N b. Securely stow all loose gear, check deck lashings, and prepare for extreme rolls. Y c. No special action as tsunamis are inconspicuous in the open ocean N d. Prepare for sudden, high-velocity wind gusts from rapidly changing directions. 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 1599: The time interval between successive wave crests is called the __________.
N a. trough Y b. period N c. frequency N d. epoch 1604: The Illustration shows the symbols used on radio facsimile weather charts. Which of these symbols indicates freezing rain? (D042NG )
N a. M N b. N N c. O Y d. P 1640: Clouds with the prefix "nimbo" in their name __________.
N a. are sheet or layer clouds N b. have undergone great vertical development N c. are middle or high altitude clouds Y d. are rain clouds 1675: You are entering port and have been instructed to anchor, as your berth is not yet available. You are on a SW'ly heading, preparing to drop anchor, when you observe the range lights as shown on your starboard beam. You should __________. (D047NG )
N a. NOT drop the anchor until the lights are in line Y b. ensure your ship will NOT block the channel or obstruct the range while at anchor N c. drop the anchor immediately as the range lights mark an area free of obstructions N d. drop the anchor immediately as a change in the position of the range lights will always be an indication of dragging anchor 1682: Which of the listed properties does warm air possess?
N a. It rises above cooler air and cools as it rises. N b. Atmospheric pressure drops as warm air rises. N c. Moisture in warm air condenses as the air is cooled. Y d. All of the above 1709: The Beaufort scale is used to estimate the __________.
N a. wind direction N b. percentage of cloud cover Y c. wind speed N d. barometric pressure 1920: Because the actual center of some planets may differ from the observed center, the navigator applies a correction known as the __________.
Y a. phase correction N b. refraction correction N c. semidiameter correction N d. augmentation correction 1994: Fomalhaut is found in what constellation?
N a. Leo N b. Taurus Y c. Pisces N d. Canis Major 1994: Fomalhaut is found in what constellation?
N a. Leo N b. Taurus Y c. Pisces N d. Canis Major 2001: You have changed course and steadied up on a range. Your heading is 285°T, same as the charted range, and it appears as in illustration D048NG. After several minutes the range appears as in illustration D047NG and your heading is still 285°T. This indicates a __________. (D047NG )
N a. south-setting current Y b. north-setting current N c. leeway caused by a NE'ly wind N d. course made good to the left of the DR track 2086: You are downbound on the Ohio River locking through Greenup. The chamber has been emptied and the lower gates are open. You hear one short blast of the whistle from the lock. You should __________.
Y a. leave the lock N b. hold up until another tow enters the adjacent lock N c. tie off to the guide wall until the river is clear of traffic N d. hold in the lock chamber due to a malfunction with the gate 2341: Which statement concerning illustration D010NG is correct? (Soundings and heights are in meters)
N a. Maury Lightship swings about her anchor on a circle with a 21-meter diameter. N b. The position of the lightship is indicated by the center of the star on the symbol's mast. Y c. The sunken wreck southwest of Beito Island shows the hull or superstructure above the sounding datum. N d. There is a 12-meter deep hole inside the 5-meter curve just west of Beito Island. 2437: When daylight savings time is kept, the times of tide and current calculations must be adjusted. One way of doing this is to __________.
N a. add 15° to the standard meridian when calculating the time differences N b. apply no correction as the times at the reference stations are adjusted for daylight savings time Y c. add one hour to the times listed for the reference stations N d. subtract one hour from the times listed for the subordinate stations 2442: 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 004°. You should now adjust the compass until it reads __________.
N a. 356° N b. 358° N c. 000° Y d. 002° 2450: You are on course 180°T and take a relative bearing of a lighthouse of 225°. What is the true bearing of the lighthouse?
Y a. 045° N b. 135° N c. 180° N d. 270° 2525: Daylight savings time is a form of zone time that adopts the time __________.
N a. two zones to the west N b. two zones to the east N c. one zone to the west Y d. one zone to the east 2583: You are in the Northern Hemisphere and a tropical wave is located 200 miles due west of your position. Where will the wave be located 24 hours later?
N a. In the same place N b. Closer and to the west N c. Closer and to the east Y d. Farther away to the west 2585: The letter D as shown represents the __________. (D006NG )
N a. visible horizon Y b. geometrical horizon N c. sensible horizon N d. celestial horizon 2586: A chart has extensive corrections to be made to it. When these are made and the chart is again printed, the chart issue is a __________.
N a. first edition Y b. new edition N c. revised edition N d. reprint 2610: A line on the Earth parallel to the equator is a __________.
N a. gnomonic curve Y b. small circle N c. meridian N d. great circle 2850: What is used to help prevent damage to barges, locks, and landings when you are locking or landing a tow?
N a. Dock cushions N b. Springers N c. Landing bars Y d. Bumpers (fenders) 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 2936: Information on search and rescue procedures and special, local communications used in Mexican waters will be found in the __________.
N a. World Port Index N b. International Code of Signals (Pub 102) Y c. Sailing Directions (Planning Guides) N d. International Aeronautical and Maritime Search and Rescue Manual 2968: Some locations maintain a zone time of -13. What are the zone time and date if the Greenwich time and date are 0152, 10 January?
N a. 0052, 9 January N b. 0258, 9 January Y c. 1452, 10 January N d. 0052, 11 January 3038: In low latitudes, the low(s) of the diurnal variation of pressure occur(s) at __________.
N a. noon N b. noon and midnight N c. 1000 and 2200 Y d. 0400 and 1600 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 3082: Which type of GPS receiver has at least four channels to process information from several satellites simultaneously?
N a. Sequential Y b. Continuous N c. Multiplex N d. None of the above