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.
51: In the U.S. Aids to Navigation System, red and green horizontally-banded buoys mark __________.
N a. channels for shallow draft vessels N b. general anchorage areas N c. fishing grounds Y d. junctions or bifurcations 71: A preferred-channel buoy may be __________.
Y a. lettered N b. spherical N c. showing a white light N d. All of the above 76: In the Northern Hemisphere, a wind that shifts counterclockwise is a __________.
N a. veering wind Y b. backing wind N c. reverse wind N d. chinook wind 85: Your longitude is 179°59'W. The LMT at this longitude is 23h 56m of the 4th day of the month. Six minutes later your position is 179°59'E longitude. Your LMT and date is now __________.
N a. 00h 02m on the 4th N b. 00h 02m on the 5th N c. 23h 50m on the 5th Y d. 00h 02m on the 6th 168: Your vessel is making way through the water at a speed of 12 knots. Your vessel traveled 30 nautical miles in 2 hours 20 minutes. What current are you experiencing?
N a. A following current at 2.0 knots N b. A head current of 2.0 knots Y c. A following current of 0.9 knot N d. A head current of 0.9 knot 195: The equation of time is 8m 00s. The mean Sun is ahead of the apparent Sun. If you are 2°W of the central meridian of your time zone, when will the apparent Sun cross your meridian?
Y a. 1216 N b. 1208 N c. 1200 N d. 1152 253: Loran-C is which type of system?
N a. Reflected electron N b. Electrical radiation N c. Quarterpoint electrical navigation Y d. Hyperbolic radio navigation 309: You are underway on course 050°T and your maximum speed is 12 knots. The eye of a hurricane bears 120°T, 110 miles from your position. The hurricane is moving towards 285°T at 25 knots. What course should you steer at 12 knots to have the maximum CPA?
N a. 332° N b. 339° Y c. 346° N d. 357° 330: You are taking bearings on two known objects ashore. The BEST fix is obtained when the angle between the lines of position is __________.
Y a. 90° N b. 30° N c. 45° N d. 60° 334: The index error is determined by adjusting the __________.
N a. sextant frame N b. horizon glass N c. index mirror Y d. micrometer drum 346: If your weather bulletin shows the center of a low pressure area to be 100 miles due east of your position, what winds can you expect in the Northern Hemisphere?
N a. East to northeast N b. East to southeast Y c. North to northwest N d. South to southeast 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 478: The velocity of the apparent wind can be more than the true wind, and come from the same direction, if certain conditions are present. One condition is that the __________.
N a. ship's speed must be less than the true wind velocity N b. true wind must be from dead astern N c. true wind velocity must be faster than the ship's speed Y d. true wind must be from dead ahead 504: Barometer readings in weather reports are given in terms of pressure at __________.
Y a. sea level N b. Washington, D.C. N c. the weather station N d. the broadcasting station 557: Your vessel has a draft of 23 feet. On 23 June 1983 you wish to pass over a temporary obstruction near Beaufort, SC, that has a charted depth of 22 feet. Allowing for a safety margin of 3 feet, what is the earliest time after 1600 DST (ZD +4) that this passage can be made?
Y a. 1750 N b. 1815 N c. 1855 N d. 1944 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 602: Between the equator and the 46th parallel of latitude, there are 3099 meridional parts. How many degrees of equatorial longitude does 3099 meridional parts represent?
N a. 35°52'45" Y b. 51°39'00" N c. 74°21'11" N d. 82°36'12" 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 651: Which topmark shown identifies an isolated danger? (D023NG )
N a. A Y b. B N c. C N d. D 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 757: The term "flood current" refers to that time when the water __________.
Y a. is flowing towards the land N b. is moving towards the ocean N c. level is not changing N d. level is rising because of heavy rains 795: The path of a celestial body during its daily apparent revolution around the Earth is called its __________.
N a. ecliptic Y b. diurnal circle N c. altitude circle N d. circle of position 821: In addition to monitoring channel 16, all Corps of Engineer locks may use as working channels __________.
N a. 06, 12 and 22A N b. 01A, 05A and 07A Y c. 12, 13 and 14 N d. 14, 24 and 28 834: In many areas "atoll" clouds (clouds of vertical development) are produced over small islands. These are the result of __________.
Y a. rising air currents produced by the warm islands N b. warm air from the sea rising over higher land areas N c. cool land air mixing with warm sea air N d. descending air over the islands 864: Uniform, grayish-white cloud sheets that cover large portions of the sky, and are responsible for a large percentage of the precipitation in the temperate latitudes, are called __________.
Y a. altostratus N b. altocumulus N c. cirrostratus N d. cirrocumulus 899: A latitude line will be obtained by observing a body __________.
N a. on the prime vertical N b. on the celestial horizon Y c. at lower transit N d. on the Greenwich meridian 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 999: You are preparing a weather report form, WS Form B-80. Three-quarters of the sky is covered with clouds, and the anemometer indicates that the apparent wind is from 226° relative at 17.7 knots. You are on course 020°T at 8 knots. How should you encode group Nddff? (D041NG )
N a. 80208 N b. 72218 N c. 72318 Y d. 62324 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. 1033: Deviation which is maximum on intercardinal compass headings may be removed by the __________.
N a. Flinders bar N b. transverse magnets N c. fore-and-aft magnets Y d. soft iron spheres on the sides of the compass 1192: You are enroute to assist vessel A. Vessel A is underway at 5.5 knots on course 033°T, and bears 284°T at 43 miles from you. What is the course to steer at 16 knots to intercept vessel A?
N a. 284° Y b. 303° N c. 329° N d. 342° 1200: You want to transit Pollock Rip Channel, MA, on 6 April 1983. What is the period of time around the 0955 (ZD +5) slack in which the current does not exceed 0.3 knot?
N a. 0911 to 0955 N b. 0940 to 1010 N c. 0955 to 1044 Y d. 0935 to 1017 1227: What will be the direction and velocity of the tidal current at Provincetown Harbor, MA, at 1405 DST (ZD +4) on 5 May 1983?
N a. 0.0 knot at 135°T N b. 0.2 knot at 135°T Y c. 0.4 knot at 315°T N d. 0.6 knot at 315°T 1282: Entering from sea, a daymark on the port side of the channel would be indicated on a chart by a __________.
N a. red triangle with the letter R N b. white triangle with the letters RG Y c. green square with the letter G N d. white square with the letters GR 1384: Which type of cloud is indicated by number 9? (D039NG )
N a. Cumulus Y b. Cumulonimbus N c. Altostratus N d. Stratocumulus 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 1522: The pressure-sensitive element of an aneroid barometer is called a __________.
N a. pressure bellows Y b. sylphon cell N c. column of mercury N d. constant pressure capsule 1565: Determine the approximate geographic visibility of an object, with a height above the water of 85 feet (25.9 meters), for an observer with a height of eye of 60 feet (18.3 meters).
N a. 18.4 nm Y b. 19.9 nm N c. 20.8 nm N d. 21.5 nm 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 1626: Which instrument is used to measure the relative humidity of the air?
N a. A hydrometer Y b. A hygrometer N c. A spectrometer N d. A barograph 1708: What generally occurs when the land is cooler than the nearby water?
Y a. A land breeze N b. A sea breeze N c. A norther N d. A prevailing westerly 1734: The eye of the hurricane has __________.
N a. very high barometric pressure N b. average barometric pressure Y c. the lowest barometric pressure N d. no change in barometric pressure 1883: Pressure gradient is a measure of __________.
N a. a high-pressure area Y b. pressure difference over horizontal distance N c. pressure difference over time N d. vertical pressure variation 1968: The Earth has the shape of a(n) __________.
N a. sphere Y b. oblate spheroid N c. spheroid of revolution N d. oblate eggoid 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 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. 2282: You have completed the magnetic compass adjustments on magnetic east and magnetic south. The vessel is now steady on magnetic west but the compass reads 276°. You should now adjust the compass until it reads __________.
N a. 264° N b. 270° Y c. 273° N d. Do not adjust the compass, just record the error. 2290: Magnets in the binnacles of magnetic compasses are used to reduce the effect of __________.
Y a. deviation N b. variation N c. local attraction N d. All of the above 2380: The navigation regulations applicable to a U.S. inland waterway can be found in the __________.
N a. Notices to Mariners N b. Channel Reports N c. Sailing Directions Y d. Coast Pilots 2410: A facility used for the discharge of a cargo of a particular hazard, such as chlorine, butane or ethane, must have what to warn water traffic of an immediate danger during fire or cargo release?
N a. An emergency boat and crew Y b. A siren or rotating flashing light N c. Flashing red lights located one-half mile upstream and downstream of the facility N d. Buoys with flashing lights controlled from shore, located one-half mile upstream and downstream of the facility 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 2584: You must construct a Mercator plotting sheet on a piece of paper measuring 30" by 36". The area includes latitude 30°45'S to 37°15'S and longitude 004°00'E to 005°00'W. Allow a one 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. 3.09 inches N b. 3.22 inches N c. 3.41 inches Y d. 3.58 inches 2618: You must draw a plotting sheet covering latitudes 38°N to 43°N and longitudes 179°E to 178°W. If the distance between each degree of longitude is 5 inches, what is the distance between latitude 38°N and latitude 43°N?
N a. 29.0 inches N b. 29.6 inches N c. 32.1 inches Y d. 32.8 inches 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 2990: In which source could you find the vertical clearance of a bridge on the Ohio River?
N a. Notice to Mariners Y b. Light List of the Mississippi River System N c. Great Lakes Pilot N d. Coast Pilot of the Gulf of Mexico 3077: ECDIS must have the capability to preserve the record of the voyage track for the previous __________.
N a. 4 hours N b. 6 hours Y c. 12 hours N d. 24 hours 3088: With respect to failure warnings and status indications, GPS receivers should provide, at a minimum, __________.
N a. an alarm if engine speed is suddenly increased Y b. an alarm if a new position has not been calculated within the last two seconds N c. an indication of a change in the number of satellites N d. None of the above. 3092: ECDIS must be able to perform all of the following EXCEPT __________.
N a. determine true bearing and distance between two geographical points Y b. determine magnetic compass deviation N c. transform a local datum to the WGS-'84 datum N d. convert "graphical coordinates" to "display coordinates" 3127: Which of the following statements is TRUE regarding automatic identification systems (AIS) ?
N a. AIS cannot be used to make passing arrangements because the system is not capable of this type of ship-to-ship communications. N b. AIS cannot be used to make passing arrangements because the ship-to-ship text messaging feature is for emergency use only. Y c. AIS can be used to make passing arrangements via ship-to-ship text messaging but a vessel operator is not relieved from the requirement to sound whistle signals or make arrangements via bridge-to-bridge radiotelephone. N d. AIS can be used to make passing arrangements via ship-to-ship text massaging thus relieving a vessel operator from making such arrangements via bridge-to-bridge radiotelephone or signaling intent to pass via whistle signals.