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.
69: The parallax angle will vary the most with the time of year for __________.
Y a. Venus N b. Jupiter N c. Saturn N d. Polaris 108: A position that is obtained by using two or more intersecting lines of position taken at nearly the same time, is a(n) __________.
N a. dead-reckoning position N b. estimated position Y c. fix N d. running fix 110: A millibar is a unit of __________.
N a. humidity N b. precipitation Y c. pressure N d. temperature 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 229: The shoreline on charts generally represents the mean __________.
Y a. high water line N b. low water line N c. low water spring line N d. tide level 260: The National Ocean Service publishes the __________.
N a. Light Lists Y b. Coast Pilots N c. pilot charts N d. Sailing Directions 469: Where are the prevailing westerlies of the Southern Hemisphere located?
N a. Between the Equator and 10° latitude N b. Between 10° and 20° latitude Y c. Between 30° and 60° latitude N d. Between 60° and 90° latitude 488: A great circle crosses the equator at 93°W. It will also cross the equator at what other longitude?
N a. 13°E Y b. 87°E N c. 177°E N d. 177°W 509: A line of position derived by radar range from an identified point on a coast will be a(n) __________.
N a. straight line Y b. arc N c. parabola N d. line parallel to the coast 604: Chronometer error may be found by __________.
N a. radio time signal N b. comparison with a timepiece of known error N c. applying the prevailing chronometer rate to previous readings Y d. All of the above 621: Navigational marks used for informational or regulatory purposes are __________.
N a. solid yellow Y b. white with orange geometric shapes N c. red and white vertically-striped N d. green and red horizontally-banded 627: You are on a coastwise voyage bound for Marcus Hook, PA. Your speed is 15 knots. You wish to use the flood tide to facilitate docking starboard side to, heading seaward. To have the most favorable tide throughout, you should time your arrival at the entrance to Delaware Bay __________.
N a. for 1 hour before flood begins N b. for 1 hour after flood begins Y c. for 3 hours after flood begins N d. for 1 hour before ebb begins 648: Weather systems in the middle latitudes generally travel from __________.
N a. north to south Y b. west to east N c. east to west N d. None of the above 715: The length of the year with respect to the vernal equinox is the __________.
Y a. tropical year N b. sidereal year N c. anomalistic year N d. All of the above 817: Which current would you encounter on a direct passage from London, England, to Cape Town, South Africa?
N a. Falkland Current N b. Brazil Current N c. Norway Current Y d. Benguela Current 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 947: The cold ocean current which meets the warm Gulf Stream between latitudes 40° and 43°N to form the "cold wall" is called the __________.
N a. North Cape Current Y b. Labrador Current N c. Greenland Current N d. North Atlantic Current 958: You are preparing a weather report form. Twenty-five percent of the sky is covered with clouds, and the anemometer indicates that the apparent wind is from 062° relative at 13 knots. You are on course 238°T at 22 knots. How should you encode group Nddff? (D041NG )
Y a. 20220 N b. 20613 N c. 30219 N d. 32413 995: What is the equivalent of 83°29.6' in time units?
N a. 5h 47m 34.8s N b. 5h 18m 22.7s N c. 5h 01m 42.3s Y d. 5h 33m 58.4s 1011: You are underway in the North Sea on course 127°T. You sight a buoy with the topmarks shown bearing two points on the starboard bow. Which action must be taken? (D025NG )
N a. Alter course to starboard until the buoy is at least two points on the port bow, then hold course. N b. Alter course to port until the buoy is broad on the starboard quarter, then hold course. N c. Change course to have the buoy close aboard either side. Y d. Ensure the bearings change to the right. 1031: While steaming north of the Irish coast, you sight a buoy which shows the light rhythm shown in illustration D028NG. How would you pass this buoy? (D028NG )
N a. North of the buoy Y b. East of the buoy N c. South of the buoy N d. West of the buoy 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 1108: Preferred channel buoys indicate the preferred channel to transit by __________.
N a. odd or even numbers Y b. the color of their top band N c. the location of the buoy in the channel junction N d. the buoy's light rhythms 1121: The articulated light is superior to other types of buoys because __________.
N a. the radar reflectors reflect better signals N b. fog horn signals travel farther to sea N c. it is equipped with strobe lights Y d. it has a reduced watch circle 1165: Which statement concerning the chartlet is TRUE? (Soundings and heights are in meters) (D010NG )
N a. Maury lightship is visible for 17 miles. Y b. There is a dangerous eddy southeast of Beito Island. N c. There is a 12-meter deep west of Beito Island and inside the 5-meter line. N d. The bottom to the south-southeast of the lightship is soft coral. 1169: The symbols shown are used on radio facsimile weather charts. The symbol indicated at letter "O" represents __________. (D042NG )
Y a. sandstorms N b. thunderstorms N c. snow N d. rain showers 1171: A light that has a light period shorter than its dark period is described as __________.
Y a. flashing N b. pulsating N c. occulting N d. alternating 1261: A light having characteristics which include color variations is defined as __________.
N a. switching Y b. alternating N c. oscillating N d. fluctuating 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 1316: When a warm air mass overtakes a cold air mass, the contact surface is called a __________.
N a. line squall N b. water spout N c. cold front Y d. warm front 1318: You are to sail from Elizabethport, N.J., on 17 November 1983 with a maximum draft of 27 feet. You will pass over an obstruction in the channel near Sandy Hook that has a charted depth of 25.5 feet. The steaming time from Elizabethport to the obstruction is 1h 50m. What is the earliest time (ZD +5) you can sail on 17 November and pass over the obstruction with 2 feet of clearance?
N a. 0059 Y b. 0121 N c. 0159 N d. 0221 1332: The longitude of the upper vertex of a great circle track is 169°E. What is the longitude of the lower vertex?
N a. 076°E N b. 169°W N c. 101°W Y d. 011°W 1347: What will be the velocity of the tidal current south of Doubling Point, ME, at 1357 EST (ZD +5) on 3 April 1983?
N a. 0.9 knot N b. 1.3 knots Y c. 2.0 knots N d. 2.6 knots 1361: The luminous range of a light takes into account the __________.
N a. glare from background lighting Y b. existing visibility conditions N c. elevation of the light N d. observer's height of eye 1393: The directive force of a gyrocompass __________.
N a. increases with latitude, being maximum at the geographic poles Y b. decreases with latitude, being maximum at the geographic equator N c. is greatest when a vessel is near the Earth's magnetic equator N d. remains the same at all latitudes 1445: The planet Mars will have its greatest magnitude when at __________.
N a. conjunction Y b. opposition N c. east quadrature N d. west quadrature 1461: The chart indicates the variation was 3°45'W in 1988, and the annual change is decreasing 6'. If you use the chart in 1991 how much variation should you apply?
Y a. 3°27'W N b. 3°27'E N c. 4°03'W N d. 4°03'E 1506: You are steaming southward along the west coast of the United States when you sight a buoy showing a flashing green light. How should you pass this buoy?
N a. Leave it to your port. Y b. Leave it to your starboard. N c. Pass it close aboard on either side. N d. Pass it on either side but well clear of it. 1550: Cirrus clouds are indicated by which number? (D039NG )
Y a. 1 N b. 4 N c. 5 N d. 7 1556: The vertical distance from the tidal datum to the level of the water is the __________.
N a. range of tide N b. charted depth Y c. height of tide N d. actual water depth 1583: The angle measured from the observer's meridian, clockwise or counterclockwise up to 180°, to the vertical circle of the body is the __________.
N a. local hour angle Y b. azimuth angle N c. meridian angle N d. observer's longitude 1706: In the Northern Hemisphere a wind is said to veer when the wind __________.
Y a. changes direction clockwise, as from north to east, etc. N b. changes direction violently and erratically N c. remains constant in direction and speed N d. changes direction counterclockwise, as from south to east, etc. 1785: Which factor(s) is/are used to develop the charted information of a lighthouse?
N a. Height of the light and the observer Y b. Height and brightness of the light N c. Brightness of the light and height of the observer N d. Height of the light only 1908: What is the brightest navigational planet?
N a. Saturn N b. Jupiter N c. Mars Y d. Venus 1942: In the horizon system of coordinates what is equivalent to the declination of the equator system?
N a. Nadir N b. Azimuth angle Y c. Altitude N d. Zenith distance 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 2002: What term is used to describe a river barge designed to carry coal or any similar cargo not requiring weather protection?
N a. Single skin N b. Double skin Y c. Open hopper N d. Deck barge 2072: The Illustration represents a movable dam. If a bear trap is open what will be displayed at the lock to indicate this condition? (D037NG )
Y a. An amber light under a red light N b. A white square N c. A green triangle N d. A yellow pentagon 2183: Diagram number D037NG represents a movable dam. If there is high water and the wickets are down so that there is an unobstructed navigable pass through the dam, what light(s) will be shown at D if the lock walls and piers are not awash?
N a. Three red lights N b. Two red lights Y c. One red light N d. No light 2242: A vessel is heading magnetic north and its magnetic compass indicates a heading of 356°. Which action should be taken to remove this error during compass adjustment?
Y a. If the red ends of the magnets are to port you should lower the athwartships tray. N b. If the red ends of the magnets are aft you should raise the fore-and-aft tray. N c. If the blue ends of the magnets are to port, and the athwartships tray is at the top, you should remove some of the magnets. N d. If the blue ends of the magnets are aft you should raise the fore-and-aft tray. 2334: Other than the Sun and Moon, the brightest object in the sky is __________.
N a. Sirius N b. Canopus Y c. Venus N d. Jupiter 2376: A large group of stars revolving around a center is known as a __________.
N a. cluster N b. shower N c. constellation Y d. galaxy 2432: A time diagram is a diagram of the celestial sphere as observed from above the __________.
Y a. south celestial pole N b. north celestial pole N c. observer's meridian N d. Greenwich meridian 2448: What is the equivalent of 37 min. 32 sec. in arc units?
N a. 4°47' N b. 6°38' N c. 7°41' Y d. 9°23' 2450: You are on course 180°T and take a relative bearing of a lighthouse of 225°. What is the true bearing of the lighthouse?
Y a. 045° N b. 135° N c. 180° N d. 270° 2456: An orange and white buoy marking an area where operating restrictions are in effect will be marked with which symbol?
N a. Open-faced diamond N b. Diamond with a cross Y c. Circle N d. Rectangle 2616: What is the equivalent of 4 min. 04 sec. in arc units?
N a. 60°16' N b. 8°08' N c. 2°08' Y d. 1°01' 2672: When you are steering on a pair of range lights and find the upper light is in line above the lower light, you should __________.
Y a. continue on the present course N b. come left N c. come right N d. wait until the lights are no longer in a vertical line 2940: On the Corps of Engineer's Navigation Maps, the channel is __________.
N a. midway between the banks N b. indicated by depths (in feet) Y c. indicated by a broken line N d. not indicated 2975: The letter H in illustration D006NG represents the __________.
N a. geoidal horizon Y b. visible horizon N c. celestial horizon N d. refractive horizon