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.
23: If Loran-C signals become unsynchronized, the receiver operator is warned because __________.
Y a. signals begin to blink N b. signals begin to shift N c. stations discontinue transmission N d. stations transmit grass 48: When should a navigator rely on the position of floating aids to navigation?
N a. During calm weather only N b. During daylight only N c. Only when inside a harbor Y d. Only when fixed aids are not available 70: The station located at "A" is the __________. (D001NG )
N a. on station N b. off station Y c. master station N d. secondary station 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 200: When navigating using GPS, what is an indicator of the geometry of the satellites that your receiver is locked onto?
Y a. Horizontal Dilution of Precision N b. Selective Availability N c. Doppler Shifting N d. Precision Coding 216: The prevailing winds in the band of latitude from approximately 5°N to 30°N are the __________.
N a. prevailing westerlies Y b. northeast trade winds N c. southeast trade winds N d. doldrums 273: Loran-C is which type of navigation system?
Y a. Hyperbolic, long-range navigation system N b. Short-range electronic N c. Long-range, high frequency navigation system N d. Long-range, with a frequency of 1950 kHz 289: A position obtained by crossing lines of position taken at different times and advanced to a common time is a(n) __________.
Y a. running fix N b. dead-reckoning position N c. fix N d. estimated position 351: Which buoy may be odd numbered?
N a. A spherical buoy Y b. An unlighted can buoy N c. A red buoy N d. A yellow buoy 351: Which buoy may be odd numbered?
N a. A spherical buoy Y b. An unlighted can buoy N c. A red buoy N d. A yellow buoy 357: On 10 August 1983 you will dock near Days Point, Weehawken, on the Hudson River, at 1800 DST (ZD +4). The charted depth alongside the pier is 24 feet (7.3 meters). What will be the depth of water when you dock?
N a. 23.5 feet (7.1 m) Y b. 23.9 feet (7.2 m) N c. 24.9 feet (7.5 m) N d. 26.3 feet (8.0 m) 399: Where will you find information about the duration of slack water?
N a. American Practical Navigator N b. Sailing Directions N c. Tide Tables Y d. Tidal Current Tables 470: You are underway on course 120°T and can make 12 knots. The eye of a hurricane bears 150°T at 120 miles. The hurricane is on course 295° at 20 knots. What course should you steer at 12 knots to have the maximum CPA?
N a. 312° N b. 330° Y c. 348° N d. 001° 559: A great circle crosses the equator at 162°E. It will also cross the equator at what other longitude?
N a. 62°E N b. 126°W N c. 162°W Y d. 18°W 559: A great circle crosses the equator at 162°E. It will also cross the equator at what other longitude?
N a. 62°E N b. 126°W N c. 162°W Y d. 18°W 597: You will be loading in Boston Harbor to a maximum draft of 32'06". The charted depth of an obstruction in the channel near Boston Light is 30 feet and you wish to have 3 feet of keel clearance. The steaming time from the pier to the obstruction is 01h 05m. What is the latest time (ZD +4) you can sail on 17 May 1983 and meet these requirements?
N a. 1610 Y b. 1728 N c. 1821 N d. 2350 606: Early indications of the approach of a hurricane may be all of the following EXCEPT __________.
Y a. short confused swells N b. gradually increasing white clouds (mare's tails) N c. pumping barometer N d. continuous fine mist-like rain 707: Set of the current is __________.
N a. its velocity in knots N b. direction from which it flows N c. estimated current Y d. direction towards which it flows 800: You are to sail from Elizabethport, NJ, 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 26 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?
Y a. 0056 N b. 0124 N c. 0154 N d. 0218 828: The true wind has been determined to be from 210°T, speed 12 knots. You desire the apparent wind to be 30 knots from 10° on the port bow. What course must you steer, and what speed must you make for this to occur?
Y a. 235°T, 18.6 knots N b. 245°T, 20.0 knots N c. 325°T, 22.4 knots N d. 335°T, 23.6 knots 905: The Sun's center is coincident with the principal vertical circle when __________.
Y a. in lower transit N b. the hour circle and prime vertical are coincident N c. the declination is zero degrees and the azimuth is exactly N 135°E N d. the declination is zero degrees and the azimuth is exactly N 135°W 912: The Light List Does NOT contain information on __________.
N a. the Global Positioning System (GPS) Y b. aeronautical lights useful for marine navigation N c. radio beacon systems N d. radio direction finder calibration stations 940: What is the length of a nautical mile?
Y a. 6,076 feet N b. 5,280 feet N c. 2,000 yards N d. 1,850 meters 949: In Region A of the IALA Buoyage System, when entering from seaward, the port side of a channel would be marked by a __________.
N a. black can buoy Y b. red can buoy N c. black conical buoy N d. red conical buoy 967: On an Atlantic Ocean voyage from New York to Durban, South Africa, you should expect the Agulhas Current to present a strong __________.
N a. offshore set N b. onshore set Y c. head current N d. fair or following current 1047: Which is NOT a contributing cause of ocean currents?
N a. Surface winds N b. Density differences in the water N c. Underwater topography Y d. Gravitational effects of celestial bodies 1062: What is the approximate geographic range of Horton Point Light, NY, if your height of eye is 40 feet (12.2 meters)? Refer to "Reprints from the LIGHT LISTS AND COAST PILOTS" .
N a. 18.8 nm Y b. 19.3 nm N c. 20.3 nm N d. 24.8 nm 1106: The legend/symbol which designates an occluded front is represented by a __________.
N a. red line Y b. purple line N c. blue line N d. dashed blue line 1110: 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. At the predicted time Y b. 30 minutes before the predicted time N c. One hour after the predicted time N d. 30 minutes before flood, one hour after an ebb 1164: The largest waves (heaviest chop) will usually develop where the wind blows __________.
N a. at right angles to the flow of the current Y b. against the flow of the current N c. in the same direction as the flow of the current N d. over slack water 1179: Which type of cloud is indicated by the number 3? (DO39NG )
Y a. Cirrocumulus N b. Altocumulus N c. Nimbostratus N d. Cumulus 1180: You are on course 238°T. To check the course of your vessel you should observe a celestial body on which bearing?
N a. 180° N b. 238° Y c. 328° N d. 090° 1353: The difference in degrees between true north and magnetic north is called __________.
Y a. variation N b. deviation N c. drift N d. compass error 1358: Despite weather predictions for continued good weather, a prudent mariner should be alert for all of the following, EXCEPT a sudden __________.
N a. drop in barometric pressure Y b. drop in temperature N c. wind shift N d. squall line 1385: What is the length of the lunar day?
Y a. 24h 50m 00s N b. 24h 00m 00s N c. 23h 56m 04s N d. 23h 03m 56s 1386: The FIRST indications a mariner will have of the approach of a warm front will be __________.
N a. large cumulonimbus clouds building up N b. low dark clouds with intermittent rain N c. fog caused by the warm air passing over the cooler water Y d. high clouds gradually followed by lower thicker clouds 1437: Determine the time after 0300 CST (ZD +6) when the velocity of the tidal current will be 0.5 knot on 16 April 1983, at Port Arthur Canal Entrance, TX.
N a. 0436 Y b. 0507 N c. 0538 N d. 0554 1471: A mountain peak charted at 700 feet breaks the horizon, and your height of eye is 12 feet. What is your approximate distance off (choose closest answer)?
Y a. 34.7 nm N b. 40.3 nm N c. 55.3 nm N d. 61.6 nm 1590: Civil twilight starts at 1812 zone time on 26 August 1981, Your DR position at that time is LAT 21°06'S, LONG 14°56' W. Which statement concerning the planets available for evening sights is TRUE?
N a. Mars will be near the prime vertical in the eastern sky. Y b. Venus may be identified from Saturn and Jupiter because it is the brightest. N c. Sights of Venus, Jupiter, and Saturn will yield a good three line fix. N d. A sight of either Jupiter, Saturn, or Venus will give a latitude line. 1612: The strongest winds and heaviest rains in a hurricane are found in the __________.
N a. outer bands N b. eye Y c. cloud walls N d. spiral rainbands 1636: A type of precipitation that occurs only in thunderstorms with strong convection currents that convey raindrops above and below the freezing level is known as __________.
N a. sleet Y b. hail N c. freezing rain N d. rime 1690: In regions near the poles, the winds are generally described as __________.
N a. westerlies Y b. easterlies N c. northerlies N d. southerlies 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 1713: When a tornado moves over the water from land it is called a __________.
N a. tornado Y b. waterspout N c. hurricane N d. cyclone 1774: Restricted areas at locks and dams are indicated by __________.
N a. flashing red lights upstream and fixed red lights downstream N b. yellow unlighted buoys Y c. signs and/or flashing red lights N d. red daymarks upstream and green daymarks downstream 2086: You are downbound on the Ohio River locking through Greenup. The chamber has been emptied and the lower gates are open. You hear one short blast of the whistle from the lock. You should __________.
Y a. leave the lock N b. hold up until another tow enters the adjacent lock N c. tie off to the guide wall until the river is clear of traffic N d. hold in the lock chamber due to a malfunction with the gate 2175: 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, which light(s) will be shown at D if the lock walls and piers are not awash?
N a. One amber light Y b. One red light N c. Two red lights N d. Three red lights 2363: As shown, the position labeled C was plotted because __________. (D051NG )
N a. the vessel's speed changed N b. the vessel's course changed form due North to due East Y c. running fixes are better estimates of true position than dead-reckoning positions N d. All of the above are correct 2369: Which magnetic compass corrector(s) CANNOT be set on a heading of magnetic east or magnetic west?
Y a. Heeling magnet N b. Flinders bar N c. Fore-and-aft magnets N d. All of the above can be set on magnetic east or magnetic west headings. 2394: 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 red ends of the magnets are aft, and the fore-and-aft tray is at the top, you should remove some magnets. N b. If the red ends of the magnet are aft, and the fore-and-aft tray is at the bottom, you should reverse the magnets. Y c. If the red ends of the magnets are aft you should raise the fore-and-aft tray. N d. If the blue ends of the magnets are forward you should remove some magnets from the fore-and-aft tray. 2518: In low latitudes, the full Moon will always rise at about __________.
N a. sunrise N b. 1200 LMT Y c. sunset N d. 2400 LMT 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 2730: When attempting an upstream landing while pushing empty barges ahead in a hard onshore wind, the approach is best made __________.
Y a. with bow out, stern in N b. with bow in, stern out N c. parallel to the dock, as close in as possible N d. parallel to the dock, as far out as possible 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 2936: Information on search and rescue procedures and special, local communications used in Mexican waters will be found in the __________.
N a. World Port Index N b. International Code of Signals (Pub 102) Y c. Sailing Directions (Planning Guides) N d. International Aeronautical and Maritime Search and Rescue Manual 2944: The height of a wave is the vertical distance __________.
N a. from the still water plane to the crest N b. from the still water plane to the trough Y c. from crest to trough N d. between water levels at one-quarter of the wave's length 2952: The channel under a bridge is marked with lights of the lateral system. The centerline of the channel shall be marked on the bridge by __________.
Y a. an occulting white light N b. a yellow light N c. three fixed white lights N d. a flashing blue light 2968: Some locations maintain a zone time of -13. What are the zone time and date if the Greenwich time and date are 0152, 10 January?
N a. 0052, 9 January N b. 0258, 9 January Y c. 1452, 10 January N d. 0052, 11 January 2988: The buoy indicated by the letter A is a __________. (D044NG )
N a. nun Y b. can N c. spar N d. pillar 3041: The letter H in illustration D006NG represents the __________.
N a. refractive horizon N b. geoidal horizon N c. celestial horizon Y d. visible horizon