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.
113: The type of transmission used in Loran-C is a __________.
N a. single pulse N b. wide pulse Y c. multipulse N d. narrow pulse 163: How many fixed objects are needed to plot a running fix?
N a. None Y b. One N c. Two N d. Three 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 188: Off Barnegat, NJ, with the wind coming out of the east, the wind-driven current will be flowing approximately __________.
N a. 286° Y b. 254° N c. 106° N d. 016° 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 231: You are outbound in a buoyed channel on course 015°T. You sight a white light showing a Morse (A) characteristic bearing 359° relative. For safety, you should __________.
N a. change course to 359°T to pass near to the buoy Y b. stay in the channel and leave the buoy to port N c. alter course to 000°T and leave the buoy well clear to starboard N d. check the chart to see where the marked danger lies in relation to the buoy 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 265: It is 1200 local time for an observer at 54°E longitude. Which statement is TRUE?
N a. It is afternoon at Greenwich. N b. It is midnight at 126°E longitude. Y c. The observer is in time zone -4. N d. All of the above are true. 284: The marine sextant is subject to seven different types of errors, four of which may be corrected by the navigator. An error NOT correctable by the navigator is __________.
N a. index error Y b. prismatic error N c. perpendicularity of the horizon glass N d. perpendicularity of the index mirror 342: A polyconic projection is based on a __________.
N a. plane tangent at one point N b. cylinder tangent at one parallel N c. cone tangent at one parallel Y d. series of cones tangent at selected parallels 360: The Illustration shows the symbols used on radio facsimile weather charts. The symbol indicated at letter "M" represents __________. (D042NG )
N a. rain Y b. snow N c. hail N d. ice 456: Which condition exists in the eye of a hurricane?
N a. Wind rapidly changing direction N b. A temperature much lower than that outside the eye N c. Towering cumulonimbus clouds Y d. An extremely low barometric pressure 498: What is an advantage of the magnetic compass aboard vessels?
N a. Compass error is negligible at or near the earth's magnetic poles. N b. It does not have to be checked as often. Y c. It is reliable due to it's essential simplicity. N d. All points on the compass rose are readily visible. 510: Which aid is NOT marked on a chart with a magenta circle?
Y a. Aero light N b. Radar station N c. Radar transponder beacon N d. Radio beacon 516: A hurricane moving northeast out of the Gulf passes west of your position. You could expect all of the following EXCEPT __________.
N a. higher than normal swells N b. high winds N c. winds veering from south, through west, to northwest Y d. gradual pressure gradient 668: You are enroute to assist vessel A. Vessel A is underway at 6 knots on course 133°T, and bears 042° at 105 miles from you. What is the course to steer at 10 knots to intercept vessel A?
N a. 063° N b. 068° N c. 073° Y d. 079° 670: A NAVAREA warning carries the following number; 1986/87 (11). Which statement is TRUE?
N a. The warning was issued in 1986, the 87th sequentially numbered warning and broadcast 11 times. Y b. This is warning number 1986 issued in 1987, and it affects sub-region 11. N c. This warning is valid in 1986 and 1987 and is the eleventh two-year warning. N d. The subject of this warning first appeared in 1986; this warning is in 1987 and is the eleventh on this topic. 703: Which statement concerning the operation of radar in fog is TRUE?
N a. Radar ranges are less accurate in fog. N b. Navigation buoys will always show up on radar. N c. A sandy beach will show up clearer on radar than a rocky cliff. Y d. Small wooden boats may not show up on radar. 751: Under the IALA Buoyage Systems, a yellow buoy may mark __________.
N a. fish net areas N b. spoil areas N c. military exercise zones Y d. All of the above 860: The Light List shows that a navigational light has a nominal range of 10 miles and a height above water of 38 feet (11.6 meters). Your height of eye is 52 feet (15.8 ,meters) and the visibility is 11.0 miles. At which approximate range will you first sight the light?
Y a. 10.5 miles N b. 13.9 miles N c. 15.6 miles N d. 18.0 miles 868: Your ship received a HYDROLANT advising of a special warning to mariners from the Department of State for ships in the Persian Gulf. You are 400 miles south of, and bound for, the Persian Gulf. What action should you take?
N a. Continue on course as the warning is advisory in nature only. Y b. Send an AMVER report and acknowledge receipt of the warning. N c. Remain a minimum of 500 miles outside the Persian Gulf and maintain radio silence. N d. Send a MERWARN message advising your position, course, speed and intentions. 945: What is NOT a side of the navigational triangle used in sight reduction?
Y a. Altitude N b. Zenith distance N c. Colatitude N d. Polar distance 972: In which source could you find the number of a chart for a certain geographic area?
N a. Chart No. 1 Y b. Catalog of Charts N c. American Practical Navigator N d. U.S. Coast Guard Light List 974: Which cloud commonly produces a halo about the Sun or Moon?
Y a. Cirrostratus N b. Cirrocumulus N c. Altostratus N d. Altocumulus 1075: The expression "first magnitude" is usually used to refer only to bodies of magnitude __________.
Y a. 1.5 and greater N b. 1.25 and greater N c. 1.0 and greater N d. 0.5 and greater 1088: Which statement about an estimated position is TRUE?
N a. It is more reliable than a fix based on radar bearings. Y b. It may be based on a single LOP or questionable data. N c. When a 3-LOP fix plots in a triangle, the center of the triangle is the estimated position. N d. It is usually based on soundings. 1114: Mechanical lifting of air by the upslope slant of the terrain is called __________.
N a. vertical lifting N b. convective lifting N c. advective lifting Y d. topographic lifting 1130: During daylight savings time the meridian used for determining the time is located farther __________.
N a. west in west longitude and east in east longitude N b. east in west longitude and west in east longitude N c. west Y d. east 1191: You plot a fix using three lines of position and find they intersect in a triangle. The actual position of the vessel __________.
N a. is outside of the triangle N b. may be anywhere in the triangle Y c. may be inside or outside of the triangle N d. is the geometric center of the triangle 1219: Which sextant in illustration D043NG reads 29°42.5'? (D043NG )
N a. A N b. B N c. C Y d. D 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 1334: The Illustration shows the symbols used on radio facsimile weather charts. The symbol indicated at letter "H" represents __________. (D042NG )
N a. ice N b. snow N c. rain Y d. hail 1491: You are on course 138°T. To check the latitude of your vessel you should observe a celestial body on which bearing?
N a. 138° N b. 270° N c. 318° Y d. 000° 1623: Which of the following statements is FALSE?
N a. An anemometer measures wind speed. N b. A barometer measures atmospheric pressure. N c. A thermometer measures temperature. Y d. A psychrometer measures wind pressure. 1643: Cumulus clouds that have undergone vertical development and have become cumulonimbus in form, indicate __________.
N a. clearing weather N b. that a warm front has passed Y c. probable thunderstorm activity N d. an approaching hurricane or typhoon 1652: Small, visible mound-like protuberances on the bottom of cumulonimbus clouds, that are potential breeding grounds for waterspouts and tornadoes, are called __________.
N a. thunderheads Y b. mamma N c. rime N d. ice prisms 1697: In the Northern Hemisphere, if the center of a high pressure area is due west of you, what wind direction would you expect?
N a. South to west N b. South to east Y c. North to west N d. North to east 1714: Which statement concerning storm surges on the Great Lakes is FALSE?
Y a. They are common along the deeper areas of the lakes. N b. They cause rapid differences in levels between one end of the lake and the other. N c. The greatest water level difference occurs when the wind is blowing along the longitudinal axis of the lake. N d. If the wind subsides rapidly, a seiche effect will most likely occur. 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 1890: A vessel heading SSE is on a course of __________.
N a. 112.5° N b. 135.0° Y c. 157.5° N d. 180.0° 1904: In the horizon system of coordinates what is equivalent to the parallels of declination of the celestial equator system?
N a. Vertical circles Y b. Parallels of altitude N c. Zenith distance N d. Azimuth angle 2075: Information about major breakdowns, repairs, or other emergency operations with regard to weirs and (or) wicket dams, on the western rivers, may be obtained by consulting the __________.
N a. Light List Vol. V N b. U.S. Coast Pilot Y c. Broadcast Notice to Mariners N d. Sailing Directions 2090: You are underway in an area where the charted depth is 8 fathoms. You compute the height of tide to be -4.0 feet. The draft of your vessel is 5.0 feet (1.52 meters). You determine the depth of the water beneath your keel to be __________.
Y a. 39 feet (11.9 meters) N b. 43 feet (13.1 meters) N c. 47 feet (14.3 meters) N d. 57 feet (17.4 meters) 2119: Which stock number indicates an NGA (NIMA) chart designed for fixing positions at sea and DR plotting while on a long voyage?
Y a. WOAGN520 N b. PILOT16 N c. 16BCO16212 N d. WOPZC5245 2134: The Moon and Sun are in line over your meridian. Tomorrow when the Sun is over your meridian, the Moon will be __________.
N a. over the meridian too Y b. about 12°East of the meridian N c. about 6°West of the meridian N d. about 11° west of the meridian 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. 2224: By convention, the north seeking ends of a compass' magnets are colored __________.
N a. black N b. blue Y c. red N d. white 2289: The constellation that contains the pointer stars is __________.
N a. Orion Y b. Ursa Major N c. the Southern Cross N d. Pegasus 2314: 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 blue ends of the magnets are forward you should raise the fore-and-aft tray. N b. If the blue ends of the magnets are aft you should lower the fore-and-aft tray. Y c. If the blue ends of the magnets are aft, and the fore-and-aft tray is at the top, you should add some magnets. N d. If the blue ends of the magnets are aft, and the fore-and-aft tray is at the bottom, you should reverse the magnets. 2316: Elongation becomes zero at __________.
N a. opposition N b. west quadrature N c. apogee Y d. inferior conjunction 2446: What is the equivalent of 47 min. 20 sec. in arc units?
N a. 8°27' Y b. 11°50' N c. 13°42' N d. 13°56' 2446: What is the equivalent of 47 min. 20 sec. in arc units?
N a. 8°27' Y b. 11°50' N c. 13°42' N d. 13°56' 2620: The navigator is concerned with three systems of coordinates. Which system is not of major concern?
N a. Terrestrial Y b. Ecliptic N c. Celestial horizon N d. Celestial equator 2694: What is the equivalent of 10°48' in time units?
N a. 2 min. 39 sec. N b. 20 min. 12 sec. Y c. 43 min. 12 sec. N d. 50 min. 12 sec. 2740: When one upbound vessel is overtaking another vessel and both are pushing a tow ahead, what reaction may you expect?
N a. Both towheads will tend to drift apart, and the overtaking vessel will be slowed down. N b. Both towheads will tend to drift together, and the overtaking vessel will be slowed down. Y c. Both towheads will tend to drift apart, and the overtaken vessel will be slowed down. N d. Both towheads will tend to drift together, and the overtaken vessel will be slowed down. 2798: A can buoy is indicated by which letter in illustration D044NG?
Y a. A N b. B N c. C N d. D 2820: A towboat is pushing barges ahead at a dangerously fast speed when __________.
N a. the towboat vibrates when backing down N b. the roostertail exceeds the height of the main deck N c. a strain is placed on the face wires Y d. water comes over the foredeck of the lead barges 2829: A spar buoy is indicated by which letter in illustration D044NG?
N a. A Y b. B N c. C N d. D 3115: With respect to automatic identification systems (AIS), which information is required to be broadcast every 1 to 10 seconds?
Y a. Time stamp N b. Destination N c. Location of antenna N d. None of the above 3130: When may the automatic identification system (AIS) be switched off?
N a. At anytime as long as it is properly logged. Y b. At the Master's professional judgment. N c. Only when the vessel is at anchor or in port. N d. Under no circumstance.