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.
4: Gyrocompass repeaters reproduce the indications of the master gyrocompass. They are __________.
N a. accurate only in the Polar regions Y b. accurate electronic servomechanisms N c. hand operated N d. accurate only if the vessel is underway 30: When taking an amplitude, the Sun's center should be observed on the visible horizon when __________.
Y a. in high latitudes N b. the Sun is near or at a solstice N c. the declination is of a different name from the latitude N d. the Sun's declination is at or near 0° 66: What will a veering wind do?
Y a. Change direction in a clockwise manner in the Northern Hemisphere N b. Circulate about a low pressure center in a counterclockwise manner in the Northern Hemisphere N c. Vary in strength constantly and unpredictably N d. Circulate about a high pressure center in a clockwise manner in the Southern Hemisphere 133: The line connecting the Loran-C master station with a secondary station is called the __________.
N a. focus line Y b. base line N c. side line N d. center line 147: Which statement is TRUE concerning equatorial tides?
N a. They occur when the Sun is at minimum declination north or south. N b. They occur when the Moon is at maximum declination north or south. Y c. The difference in height between consecutive high or low tides is at a minimum. N d. They are used as the basis for the vulgar establishment of the port. 169: You want to transit Hell Gate on 23 July 1983. What is the period of time around the AM (ZD +4) slack before ebb when the current will be less than 0.5 knot?
Y a. 0939 to 0957 N b. 0943 to 0953 N c. 0844 to 0852 N d. 0348 to 0356 206: The winds you would expect to encounter in the North Atlantic between latitudes 5° and 30° are known as the __________.
N a. doldrums N b. westerlies Y c. trades N d. easterlies 208: The moon is full and at perigee on 20 January 1983. What is the maximum current you could expect at 2350 (ZD +5) at Nantucket Shoals?
N a. 0.5 knot N b. 0.7 knot N c. 0.8 knot Y d. 1.0 knot 297: The tides in Boston Harbor generally __________.
N a. are diurnal in nature N b. have their variations caused by the changing declination of the Moon Y c. have a greater range than the tides in Gulf Coast ports N d. All of the above 331: What indicates a buoy that should be left to port when entering from seaward? (U.S. Aids to Navigation System)
N a. White light N b. Group flashing characteristic N c. Nun shape Y d. Odd number 422: If you are sailing from the East Coast of the United States to the Caribbean Sea, which publication would contain information on weather, currents, and storms?
N a. Sailing Charts of the Caribbean Sea Y b. Pilot Charts of the North Atlantic N c. Light Lists, Atlantic and Gulf Coast N d. Tidal Current Tables 442: In very high latitudes, the most practical chart projection is the __________.
N a. Mercator N b. gnomonic N c. azimuthal Y d. Lambert conformal 571: The Coast Guard Captain of the Port has excluded all traffic from a section of a port, while a regatta is taking place. The buoys marking this exclusion area will be __________.
N a. nun- or can-shaped to conform to the overall direction of navigation N b. yellow Y c. orange and white N d. marked with a spherical topmark 658: Monsoons are characterized by __________.
N a. light, variable winds with little or no humidity N b. strong, gusty winds that blow from the same general direction all year Y c. steady winds that reverse direction semiannually N d. strong, cyclonic winds that change direction to conform to the passage of an extreme low pressure system 684: The ARPA may swap targets when automatically tracking if two targets __________.
N a. are tracked on reciprocal bearings N b. are tracked at the same range N c. are tracked on the same bearing Y d. pass close together 735: The period of the Earth's revolution from perihelion to perihelion is the __________.
N a. astronomical year Y b. anomalistic year N c. solar year N d. sidereal year 805: If the right ascension of a body is 9 hours, it also __________.
Y a. is 135° N b. corresponds to an SHA for the body of 45° N c. means that the GP of the body is in the western hemisphere N d. All of the above 838: A navigator fixing a vessel's position by radar __________.
N a. must use information from targets forward of the beam N b. should never use radar bearings N c. should only use radar bearings when the range exceeds the distance to the horizon Y d. can use radar information from one object to fix the position 842: Coast Pilots and navigational charts are kept corrected and up-to-date by using the __________.
N a. pilot charts Y b. Notices to Mariners N c. Tide Tables N d. Current Tables 862: The U.S. Coast Guard publishes __________.
Y a. Light Lists N b. U.S. Coast Pilots N c. Radio Navigational Aids N d. All of the above 873: Compass error is equal to the __________.
N a. deviation minus variation N b. variation plus compass course Y c. combined variation and deviation N d. difference between true and magnetic heading 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 953: The magnetic compass operates on the principle that __________.
N a. like magnetic poles attract N b. unlike magnetic poles repel Y c. unlike poles attract N d. the poles of the compass line up with the geographic poles of the earth 954: A thin, whitish, high cloud popularly known as "mares' tails" is __________.
N a. altostratus N b. stratus N c. cumulus Y d. cirrus 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 1071: A cardinal mark showing an uninterrupted quick-flashing white light indicates the deepest water in the area is on the __________.
Y a. north side of the mark N b. west side of the mark N c. east side of the mark N d. south side of the mark 1077: A current will develop between areas of different density in ocean waters. If you face in the same direction the current is flowing, the water of __________.
N a. high density will be on the left in the Northern Hemisphere N b. high density will be on the right in the Southern Hemisphere Y c. low density will be on the left in the Northern Hemisphere N d. low density will be on the left in the Southern Hemisphere 1206: Brief, violent showers frequently accompanied by thunder and lightning are usually associated with __________.
N a. passage of a warm front Y b. passage of a cold front N c. winds shifting counterclockwise in the Northern Hemisphere N d. stationary high pressure systems 1453: Indications of the master gyrocompass are sent to remote repeaters by the __________.
N a. follow-up system Y b. transmitter N c. phantom element N d. azimuth motor 1489: Cumulonimbus clouds can produce __________.
N a. dense fog and high humidity Y b. gusty winds, thunder, rain or hail, and lightning N c. clear skies with the approach of a cold front N d. a rapid drop in barometric pressure followed by darkness 1504: The time meridian used when computing the height of tide for Pensacola Bay, FL, is __________.
N a. 75°00'W N b. 82°30'W Y c. 90°00'W N d. 97°30'W 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 1544: The height of a tide can be increased by __________.
Y a. a storm surge N b. a high pressure area N c. the jet stream N d. a cold front 1751: A tsunami is caused by a(n) __________.
N a. tidal wave N b. storm surge caused by a hurricane or tropical storm Y c. earthquake on the ocean's floor N d. tornado 1780: While in port, you can follow the approach of a dangerous cyclonic storm by inspecting __________.
N a. the Coast Pilot or Sailing Directions N b. the National Weather Service Observing Handbook No.1, Marine Surface Observations Y c. a newspaper N d. the sky overhead 1936: The parallel of latitude at 66°33'N is the __________.
N a. Tropic of Cancer N b. Tropic of Capricorn Y c. Arctic Circle N d. ecliptic 1949: "Revolution" is the __________.
N a. wobbling of the Earth about its axis N b. motion of bodies in the solar system relative to the stars Y c. motion of a celestial body in its orbit N d. spinning of a celestial body about its axis 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 2050: The point where the vertical rise or fall of tide has stopped is referred to as __________.
N a. slack water N b. the rip tide Y c. the stand of the tide N d. the reverse of the tide 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 2180: Relative humidity is defined as __________.
N a. the maximum vapor content the air is capable of holding N b. the minimum vapor content the air is capable of holding Y c. the ratio of the actual vapor content at the current temperature to the air's vapor holding capability N d. the relation of the moisture content of the air to barometric pressure 2241: The letter C in illustration D006NG represents the __________.
N a. visible horizon N b. geoidal horizon N c. sensible horizon Y d. celestial horizon 2316: Elongation becomes zero at __________.
N a. opposition N b. west quadrature N c. apogee Y d. inferior conjunction 2318: Miaplacidus is found in what constellation?
N a. Puppis N b. Hydrus N c. Centaurus Y d. Carina 2375: The shortest distance between any two points on earth defines a __________.
N a. small circle Y b. great circle N c. rhumb line N d. hyperbola 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 2648: The 3-cm radar as compared to a 10-cm radar with similar specifications will __________.
N a. give better range performance in rain, hail, etc. N b. display small targets in a mass of dense sea clutter at a greater range N c. have less sea return in choppy rough seas Y d. display a more maplike presentation for inshore navigation 2664: The Light List shows a lighted aid to navigation on the right bank. This means that the light can be seen on the port side of a vessel __________.
N a. crossing the river N b. descending the river Y c. ascending the river N d. proceeding towards sea 2703: Which publication indicates the HYDROLANTS or HYDROPACS issued since the previous working day?
N a. Broadcast Notice to Mariners N b. Local Notice to Mariners Y c. Daily Memorandum N d. Summary of Corrections 2798: A can buoy is indicated by which letter in illustration D044NG?
Y a. A N b. B N c. C N d. D 2876: On 13 November 1981 you observe a back sight of the lower limb of the Sun. The sextant altitude (hs) is 109°23.6'. The height of eye is 66 feet, and the index error is 2.0' off the arc. What is the observed altitude (Ho)?
N a. 71°01.2' Y b. 70°57.2' N c. 70°45.4 N d. 70°26.4' 2878: Given are the courses and speeds of 4 vessels. The navigator of which vessel would be required to know the actual time of meridian transit in order to take an accurate observation at LAN?
N a. C 356°T, Sp 5 knots N b. C 099°T, Sp 17 knots Y c. C 192°T, Sp 23 knots N d. C 278°T, Sp 6 knots 2887: The letter B in illustration D006NG represents the __________.
N a. visible horizon N b. sensible horizon Y c. geoidal horizon N d. celestial horizon 2928: You are in a buoyed channel at night and pass a lighted buoy with an irregular characteristic. You should report this to the __________.
Y a. Coast Guard N b. harbor master N c. Corps of Engineers N d. National Ocean Service 2962: While navigating in fog off a coastline of steep cliffs, you hear the echo of the ship's fog horn 4 1/2 seconds after the signal was sounded. What is the distance to the shore?
N a. 405 yards N b. 628 yards N c. 730 yards Y d. 825 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 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 3104: In general, on how many radio channels will an automatic identification system (AIS) operate?
Y a. 3 N b. 5 N c. 7 N d. 9 3114: With respect to automatic identification systems (AIS), which information is expected to be broadcast every 1 to 10 seconds?
N a. Rate of turn N b. Latitude and longitude N c. Navigational status Y d. All of the above 3123: Which of the following statements is TRUE regarding automatic identification systems (AIS)?
N a. AIS is a global tracking system that relies upon INMARSAT C service to communicate vessel position and other safety related information to similarly equipped vessels, aircraft and shore stations within the area. N b. AIS is a short-range 3 cm X-band radar system that automatically sends a vessel's position and other safety related information to similarly equipped vessels, aircraft and shore stations within the area. Y c. AIS is a short-range VHF-FM system that automatically broadcasts a vessel's position and other safety related information frequently to similarly equipped vessels, aircraft and shore stations within the area. N d. AIS is a one-way centrally managed system that requires the local VTS to send commands to instruct each vessel to broadcast position and other safety related information to similarly equipped vessels, aircraft and shore stations within the area.