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.
32: The datum used for soundings on charts of the Atlantic Coast of the United States is mean __________.
N a. low water Y b. lower low water N c. higher high water N d. high water 34: The Local Notice to Mariners is usually published __________.
N a. daily Y b. weekly N c. monthly N d. semiannually 42: The datum used for soundings on charts of the East Coast of the United States is __________.
N a. mean low water springs N b. mean low water Y c. mean lower low water N d. half tide level 81: A buoy with a composite group-flashing light indicates a(n) __________.
Y a. bifurcation N b. fish net area N c. anchorage area N d. dredging area 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 225: The equation of time is 8m 40s. The apparent Sun is ahead of the mean Sun. If you are on the central meridian of your time zone, the apparent Sun will cross your meridian at __________.
Y a. 11-51-20 ZT N b. 12-00-00 ZT N c. 12-04-20 ZT N d. 12-08-40 ZT 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° 449: You are enroute to assist vessel A. Vessel A is underway at 5 knots on course 063°T, and bears 136°T at 78 miles from you. What is the course to steer at 13 knots to intercept vessel A?
N a. 340° N b. 295° N c. 158° Y d. 114° 449: You are enroute to assist vessel A. Vessel A is underway at 5 knots on course 063°T, and bears 136°T at 78 miles from you. What is the course to steer at 13 knots to intercept vessel A?
N a. 340° N b. 295° N c. 158° Y d. 114° 461: Under the U.S. Aids to Navigation System, a yellow buoy may __________.
Y a. mark a fish net area N b. be lighted with a white light N c. show a fixed red light N d. All of the above 462: For what purpose would using a Lambert conformal chart be more convenient than using a Mercator?
Y a. Plotting radio bearings over a long distance N b. Determining latitude and longitude of a fix N c. Measuring rhumb line distances N d. Measuring rhumb line directions 466: In the relatively calm area near the hurricane center, the seas are __________.
N a. moderate but easily navigated N b. calm Y c. mountainous and confused N d. mountainous but fairly regular as far as direction is concerned 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 525: In the celestial equator system of coordinates, what is comparable to latitude on the terrestrial sphere?
N a. Altitude N b. Right ascension N c. Celestial meridians Y d. Declination 581: The Captain of the Port has closed to navigation, and buoyed, a section of a harbor. These buoys would be painted __________.
N a. red or green to conform with the other lateral aids N b. red and green horizontally-striped N c. solid yellow Y d. white with orange markings 582: Distance along a track line is measured on a Mercator chart by using the __________.
Y a. latitude scale near the middle of the track line N b. longitude scale near the middle of the track line N c. latitude scale at the mid-latitude of the chart N d. latitude or longitude scale at the middle of the scale 608: In which voyage, between two points, is the rhumb line distance NOT approximately the same as the great circle distance?
N a. The two points are in low latitudes in the same hemisphere. Y b. The two points are in high latitudes in the same hemisphere. N c. The two points are near the equator, but in different hemispheres. N d. One point is near the equator, one point is in a high latitude, and both are near the 180th meridian. 639: In the Northern Hemisphere, what type of cloud formations would you expect to see to the west of an approaching tropical wave?
Y a. Cumulus clouds lined up in rows extending in a northeast to southwest direction N b. High altostratus clouds in the morning hours N c. Cirrostratus clouds lined up in rows extending in a northeast to southwest direction N d. Cirrostratus clouds lined up in rows extending in a north to south direction 693: Which general statement concerning radar is FALSE?
N a. Raising the antenna height increases the radar range. Y b. The ability of radar to detect objects is unaffected by weather conditions. N c. Radar bearings are less accurate than radar ranges. N d. Radar should be checked regularly during clear weather to ensure that it is operating properly. 786: The greater the pressure difference between a high and a low pressure center, the __________.
N a. dryer the air mass will be N b. cooler the temperature will be Y c. greater the force of the wind will be N d. warmer the temperature will be 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 889: The Light List shows that a navigational light has a nominal range of 6 miles and a height above water of 18 feet (5.5 meters). Your height of eye is 47 feet (14.3 meters) and the visibility is 1.5 miles. At what approximate range will you first sight the light?
N a. 1.5 miles Y b. 2.0 miles N c. 6.0 miles N d. 12.7 miles 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 1014: Relative humidity is the percentage of water vapor that is in the air as compared to the maximum amount it can hold at __________.
N a. a specific barometric pressure Y b. a specific temperature N c. a specific wind speed N d. any time 1036: A frontal thunderstorm is caused by __________.
N a. pronounced local heating N b. wind being pushed up a mountain Y c. a warm air mass rising over a cold air mass N d. an increased lapse rate caused by advection of warm surface air 1103: The vertical component of the Earth's magnetic field causes induced magnetism in vertical soft iron. This changes with latitude. What corrects for this coefficient of the deviation?
Y a. The Flinders bar N b. The heeling magnet N c. Quadrantal soft iron spheres N d. Bar magnets in the binnacle 1135: A position on the Earth has a longitude of 74°10'E. Its celestial counterpart would have a __________.
Y a. GHA of 285°50' N b. SHA of 74°10' N c. SHA of 285°50' N d. LHA of 74°10'E 1201: What is NOT true concerning color sectors of lights?
Y a. Color sectors are expressed in degrees from the light toward the vessel. N b. Color sectors may indicate dangerous waters. N c. Color sectors may indicate the best water across a shoal. N d. Color sectors may indicate a turning point in a channel. 1277: The velocity and direction of the tidal current at Port Morris, NY, at 1135 DST (ZD +4) on 13 May 1983 will be __________.
Y a. negligible at 220°T N b. 3.1 knots at 045°T N c. 1.2 knots at 220°T N d. 1.0 knot at 045°T 1289: A body can only be observed at lower transit when __________.
N a. the declination is the opposite name to the latitude N b. the algebraic sum of the colatitude and declination exceeds 90° N c. the observer is in high latitudes above either polar circle Y d. the body is circumpolar 1295: The best estimate of the wind direction at sea level can be obtained from observing the direction of the __________.
N a. cloud movement N b. vessel heading Y c. waves N d. swells 1319: The Sailing Directions (Planning Guide) contain information on all of the following EXCEPT __________.
Y a. coastal features N b. ocean basin environment N c. ocean routes N d. military operating areas 1320: You are enroute to Savannah, GA, from Recife, Brazil. There is a strong N'ly wind blowing. As you cross the axis of the Gulf Stream you would expect to encounter __________.
Y a. steeper waves, closer together N b. smoother seas and warmer water N c. cirrus clouds N d. long swells 1406: What will act to dissipate fog?
N a. Upwelling cold water N b. Advection of warm air over a colder surface N c. Rain that is warmer than air Y d. Downslope motion of an air mass along a coast 1508: A line of position is __________.
N a. a line connecting two charted objects Y b. a line on some point of which the vessel may be presumed to be located N c. the position of your vessel N d. not used in a running fix 1548: The Illustration shows the symbols used on radio facsimile weather charts. The symbol indicated at letter "K" represents a __________. (D042NG )
Y a. hurricane N b. thunderstorm N c. convergence zone N d. convergence line 1584: A decrease in barometric pressure is associated with all of the following except __________.
N a. rising warm air N b. proximity to a low pressure area N c. inward spiraling circulation Y d. clear dry weather 1613: Where would you find information concerning the duration of slack water?
N a. Tide Tables Y b. Tidal Current Tables N c. American Practical Navigator N d. Sailing Directions 1685: Squall lines with an almost unbroken line of threatening dark clouds and sharp changes in wind direction, generally precede a(n) __________.
N a. slow-moving warm front Y b. fast-moving cold front N c. stationary front N d. occluded front 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 1781: While in port, you can follow the approach of a dangerous cyclonic storm by inspecting __________.
N a. the sky overhead N b. the National Weather Service Observing Handbook No.1, Marine Surface Observations N c. the Coast Pilot or Sailing Directions Y d. a weather map 1892: The shoreline shown on nautical charts of areas affected by large tidal fluctuations is usually the line of mean __________.
N a. lower low water N b. low water N c. tide level Y d. high water 1916: The prime vertical is the reference point from which the angle of which type of observation is measured?
N a. Sextant angle N b. Azimuth Y c. Amplitude N d. Local apparent noon 2140: The visible range marked on charts for lights is the __________.
N a. minimum distance at which the light may be seen with infinite visibility N b. minimum distance at which the light may be seen based on a 12 mile distance to visible horizon N c. maximum distance the light may be seen restricted by the height of the light and the curvature of the earth Y d. maximum distance at which a light may be seen in clear weather with 10 miles visibility 2163: The letter C in illustration D006NG represents the __________.
N a. visible horizon N b. geoidal horizon Y c. celestial horizon N d. sensible horizon 2194: A vessel is heading magnetic north and its magnetic compass indicates a heading of 003°. What action should be taken to remove this error during compass adjustment?
N a. If the red ends of the magnets are forward you should lower the fore-and-aft magnets. N b. If the blue ends of the magnets are forward you should lower the fore-and-aft magnets. Y c. If the blue ends of the magnets are to port and the athwartships tray is at the bottom you should reverse the magnets. N d. If the blue ends of the magnets are to port and the athwartships tray is at the top you should add some magnets. 2196: A vessel is heading magnetic northwest and its magnetic compass indicates a heading of 312°. What action should be taken to remove this error during compass adjustment?
Y a. If the quadrantal spheres are all the way out, replace them with smaller spheres. N b. If the quadrantal spheres are all the way in, replace them with larger spheres. N c. If the quadrantal spheres are all of the way out, move the spheres in. N d. If the quadrantal spheres are all the way out, replace them with larger spheres. 2222: By convention, the south pole of a magnet is painted __________.
N a. red Y b. blue N c. white N d. black 2256: The constellation that contains Polaris is __________.
N a. Orion N b. Cassiopeia Y c. Ursa Minor N d. Corona Borealis 2262: The Milky Way is an example of a __________.
N a. cluster Y b. galaxy N c. nova N d. nebula 2356: As observed from the Earth, the angle between lines from the Earth to the Sun and the Earth to an inferior planet is known as __________.
Y a. elongation N b. conjunction N c. opposition N d. quadrature 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 2764: You are in a channel inbound from sea. A daymark used to mark a channel junction when the preferred channel is to port will have the shape indicated by what letter in illustration D045NG?
N a. A N b. B N c. C Y d. D 2839: Privately maintained aids to navigation included in the Light List __________.
N a. are painted white and must use a white light if lighted N b. must be conspicuously marked by a signboard with the words "PRIVATE AID" Y c. must conform to the standards of the U.S. Aids to Navigation System N d. are not permitted in or along first-class waterways and may be authorized for second- and third-class waterways 2884: The pictures shown represent the geographic location of a vessel and the radar presentation at the same time. Which statement is TRUE? (D011NG )
Y a. Ship No. 1 does not appear as an individual target due to the effect of beam width. N b. Small island is not detected due to the multiple echo effect from the mountain. N c. A tangent bearing of the headland to the south-southeast is corrected by subtracting one-half of the beam width. N d. Ship No. 2 is not detected due to the side lobe effect of radar reflecting from the mountain. 2918: Which agency maintains federal aids to navigation?
N a. Corps of Engineers Y b. Coast Guard N c. National Ocean Service N d. Maritime Administration 2931: The vertical distance from the tidal datum to the level of the water is the __________.
N a. range of tide Y b. height of tide N c. actual water depth N d. charted depth 3020: A mooring buoy, if lighted, shows which color light?
N a. Yellow Y b. White N c. Blue N d. Any color except red or green 3025: You determine your vessel's position by taking a range and bearing to a buoy. Your position will be plotted as a(n) __________.
Y a. estimated position N b. dead-reckoning position N c. fix N d. running fix 3036: Which daymark has no lateral significance?
N a. Square; top half green and bottom half red Y b. Black and white diamond N c. Red triangle N d. Green square