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.
38: When navigating a vessel, you __________.
N a. can always rely on a buoy to be on station N b. can always rely on a buoy to show proper light characteristics N c. should assume a wreck buoy is directly over the wreck Y d. should never rely on a floating aid to maintain its exact position 61: Red lights may appear on __________.
Y a. horizontally banded buoys N b. vertically striped buoys N c. yellow buoys N d. spherical buoys 83: All Loran-C transmitting stations are equipped with cesium frequency standards which permit __________.
N a. every station in one chain to transmit at the same time Y b. each station to transmit without reference to another station N c. on-line transmission of single-line transmitters at the same time N d. each station to only depend on the master for synchronization and signal ratio 151: Under the U.S. Aids to Navigation System, spherical buoys may be __________.
N a. numbered Y b. lettered N c. lighted N d. All of the above 202: On charts of U.S. waters, a magenta marking is NOT used for marking a __________.
N a. radio beacon N b. lighted buoy N c. prohibited area Y d. 5-fathom curve 214: A sextant having an index error that is "on the arc" has a __________.
N a. positive correction N b. dip error Y c. negative correction N d. semidiameter error 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 248: What is the index error of sextant A in illustration D050NG? (D050NG )
N a. 0° 10' off the arc N b. 0° 10' on the arc N c. 3° 00' off the arc Y d. 4° 20' off the arc 267: You are inbound in a channel marked by a range. The range line is 309°T. You are steering 306°T and have the range in sight as shown. The range continues to open. What action should you take? (D047NG )
N a. Alter course to the right to 309°T or more to bring the range in line. Y b. Alter course to the left until the range closes, then steer to the left of 306°T. N c. Alter course to the left to close the range, then alter course to 309°T. N d. Maintain course as it is normal for the range to open as you get close. 338: The illustration shows the symbols used on radio facsimile weather charts. The symbol indicated at letter "N" represents __________. (D042NG )
N a. hail N b. freezing rain Y c. rain N d. snow 405: At upper transit, if the zenith distance is 34°, the geographical distance from the observer to a body's GP is __________.
N a. 510 miles N b. 1220 miles Y c. 2040 miles N d. 2260 miles 512: On a gnomonic chart, a great circle track between Los Angeles and Brisbane will appear as a __________.
N a. loxodromic curve N b. curved line concave to the equator Y c. straight line N d. spiral approaching the poles as a limit 629: The rise and fall of the ocean's surface due to a distant storm is known as __________.
N a. sea N b. waves N c. fetch Y d. swell 656: In the Northern Hemisphere you are caught in the dangerous semicircle with plenty of sea room available. The best course of action is to bring the wind on the __________.
Y a. starboard bow and make as much headway as possible N b. starboard quarter, and make as much headway as possible N c. port quarter, and make as much headway as possible N d. port bow, and make as much headway as possible 661: Under the IALA Buoyage Systems, safe water marks may show a __________.
N a. composite group-flashing, Fl(2 + 1), red light N b. composite group-flashing, Fl(2 + 1), green light N c. quick-flashing, Q(9)15s, white light Y d. white Morse (A) light 770: 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?
Y a. The course and speed made good should be determined and used to advance the LOP. N b. The drift should be added to the ship's speed. N c. The current should be ignored. N d. The set should be applied to the second bearing. 787: You are on a voyage from New Orleans to Boston. When navigating off the Florida coast, you will get the greatest benefit from the Gulf Stream if you navigate __________.
Y a. about 45 miles east of Cape Canaveral N b. about 25 miles east of Daytona Beach N c. along the 50-fathom curve N d. close inshore between Fowey Rocks and Jupiter Inlet 798: A HYDROLANT warning would normally be sent for all of the following EXCEPT __________.
Y a. extinguishment of Robbins Reef Light in New York City's Upper Bay N b. unexploded ordinance in ocean waters at a depth of 78 fathoms (143 meters) N c. the presence of a large unwieldy tow in congested offshore water N d. a report of an overdue ship 799: In Region A of the IALA Buoyage System, when entering from seaward, the starboard side of a channel would be marked by a __________.
N a. green can buoy N b. red can buoy Y c. green conical buoy N d. red conical buoy 914: If the sky was clear, with the exception of a few cumulus clouds, it would indicate __________.
N a. rain N b. hurricane weather Y c. fair weather N d. fog setting in 991: You are underway in the North Sea on course 328°T when you sight a buoy broad on your port bow. You are in the best navigable water if the buoy __________.
N a. has a topmark of two cones with points down N b. is a western quadrant buoy N c. is painted yellow on the top half and black on the bottom Y d. exhibits a light with the characteristic of VQ(3)5s 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 1059: The Light List shows that a navigational light has a nominal range of 17 miles and a height above water of 28 feet (8.5 meters). Your height of eye is 32 feet (9.8 meters) and the visibility is 11.0 miles. At what approximate range will you first sight the light?
N a. 11.0 miles Y b. 12.6 miles N c. 15.7 miles N d. 18.0 miles 1060: Isobars on a weather map are useful in predicting __________.
N a. temperature N b. dew point Y c. wind velocity N d. relative humidity 1069: What do the numbers on isobars indicate?
Y a. barometric pressure N b. temperature N c. rain in inches N d. wind speed 1178: The range of tide is the __________.
N a. distance the tide moves out from the shore Y b. difference between the heights of high and low tide N c. duration of time between the high and low tide N d. maximum depth of the water at high tide 1193: If a ship is proceeding towards the magnetic equator, the uncorrected deviation due to permanent magnetism __________.
N a. increases N b. remains the same Y c. decreases N d. is unimportant and may be neglected 1219: Which sextant in illustration D043NG reads 29°42.5'? (D043NG )
N a. A N b. B N c. C Y d. D 1220: Under the U.S. Aids to Navigation System, a lighted buoy with a spherical topmark marks __________.
N a. the position of underwater cables N b. a hazard to navigation N c. the port side of the channel Y d. safe water 1242: Daymarks marking the starboard side of the channel when going towards the sea are __________.
Y a. green squares N b. green triangles N c. red squares N d. red triangles 1362: Which type of cloud is indicated by the number 7 in illustration D039NG? (D039NG )
N a. Cirrostratus N b. Altocumulus Y c. Cumulus N d. Cumulonimbus 1597: The dense black cumulonimbus clouds surrounding the eye of a hurricane are called __________.
N a. spiral rainbands Y b. cloud walls N c. funnel clouds N d. cyclonic spirals 1619: Sextant A reads __________. (D043NG )
Y a. 29°42.7' N b. 29°45.7' N c. 29°51.8' N d. 30°47.2' 1701: Which general weather conditions should you expect to find in a low pressure system?
N a. Fair weather Y b. Precipitation and cloudiness N c. Scattered clouds at high elevations N d. Gradual clearing and cooler temperatures 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 1772: The GP of a body for a high altitude sight is determined from the declination and the __________.
Y a. Greenwich hour angle N b. azimuth N c. zenith distance N d. right ascension 1799: The letter D in illustration D006NG represents the __________.
N a. celestial horizon N b. visible horizon Y c. geometrical horizon N d. geoidal horizon 1951: Spring tides occur __________.
Y a. when the moon is new or full N b. when the moon and sun have declination of the same name N c. only when the moon and sun are on the same sides of the earth N d. at the beginning of spring when the sun is over the equator 2022: The GP of a body for a high altitude sight is determined from the declination and the __________.
N a. right ascension N b. sidereal hour angle Y c. Greenwich hour angle N d. observed altitude 2076: You should plot your dead reckoning position __________.
Y a. from every fix or running fix N b. from every estimated position N c. every three minutes in pilotage waters N d. only in pilotage waters 2079: Permission to enter the riverward chamber of twin locks is given by the lockmaster and consists of which sound signal?
N a. One short blast N b. Two short blasts N c. One long blast Y d. Two long blasts 2152: Permanent magnetism is found in __________.
Y a. hard iron N b. soft iron N c. vertical iron only N d. horizontal iron only 2212: Which information is found in the chart title?
N a. Number of the chart N b. Edition date N c. Variation information Y d. Survey information 2250: The most important information to be obtained from a barometer is the __________.
N a. difference between the reading of the two pointers, which shows wind direction N b. last two figures of the reading of the pointer, such as .87, .76, or .92 Y c. present reading of the pressure, combined with the changes in pressure observed in the recent past N d. weather indications printed on the dial (such as "cold, wet, etc.") under the pointer 2269: One of the factors which affects the circulation of ocean currents is __________.
N a. humidity Y b. varying densities of water N c. vessel traffic N d. the jet stream 2346: The first point of Aries is the point where the Sun is at __________.
N a. maximum declination north N b. maximum declination south Y c. 0° declination going to northerly declinations N d. 0° declination going to southerly declinations 2354: A vessel is heading magnetic east and its magnetic compass indicates a heading of 093°. What action should be taken to remove this error during compass adjustment?
N a. If the blue ends of the magnets are to port you should raise the athwartships tray. N b. If the red ends of magnets are to port you should lower the athwartships tray. N c. If the red ends of the magnets are aft you should lower the fore-and-aft tray. Y d. If the blue ends of the magnets are forward you should raise the fore-and-aft tray. 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 2429: The lock chamber is 600 feet X 110 feet. Your towboat is 150 feet X 35 feet. Which of these tows will require a double lockage?
N a. A set-over single N b. 4 standard barges abreast next to your boat's head and 3 jumbo abreast in the lead N c. 6 jumbo (3 abreast and 2 long) with a standard on each side of your boat Y d. 9 jumbo barges 2436: Aphelion is the point where the Sun __________.
N a. and Moon and Earth form a right angle N b. and Moon and Earth are in line N c. crosses the celestial equator Y d. is farthest from the Earth 2504: Under the IALA-A Buoyage System, when entering from seaward a lateral system buoy to be left to starboard may display which topmark shown? (D046NG )
N a. A N b. B Y c. C N d. D 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 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 2869: A pillar buoy is indicated by which letter shown in the illustration? (D044NG )
N a. A N b. B Y c. C N d. D 2902: The direction a vessel is pointed at any given time is the __________.
N a. course N b. track Y c. heading N d. course over the ground 3067: Which of the following are data layer categories to be displayed on ECDIS?
N a. ECDIS warnings and messages N b. Hydrographic Office data N c. Notice to Mariners information Y d. All of the above 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 3091: Which of the following must an ECDIS system be able to perform?
N a. Conversion of "graphical coordinates" to "display coordinates" N b. Transformation of local datum to WGS-'84 datum N c. Calculation of true azimuth and distance between two geographical points Y d. All of the above 3113: With respect to automatic identification systems (AIS), which information is required to be broadcast every 1 to 10 seconds?
N a. Call sign N b. Vessel's draft N c. Route plan Y d. None of the above 3124: Which of the following statements is TRUE regarding automatic identification systems (AIS)?
Y a. AIS is a short-range VHF-FM system that automatically broadcasts a vessel's position, course, speed and other safety related information to all those with similar equipment in the area. N b. AIS is a one-way centrally managed system that requires the local VTS to send commands to instruct each vessel to broadcast position, course, speed and other safety related information to all those with similar equipment in the area. N c. AIS is a global tracking system that relies upon INMARSAT C service to communicate vessel position, course, speed and other safety related information to all those with similar equipment in the area. N d. AIS is a short-range 3 cm X-band radar system that automatically sends a vessel's position, course, speed and other safety related information to all those with similar equipment within the area.