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.
45: The navigator aboard a ship at approximately 165°E longitude observes the Sun at ZT 14-25-04 on 21 September. What is the GMT and Greenwich date of the observation?
Y a. 03-25-04, 21 September N b. 02-25-04, 21 September N c. 01-25-04, 21 September N d. 01-25-04, 20 September 104: What should you apply to a fathometer reading to determine the depth of water?
N a. Subtract the draft of the vessel. Y b. Add the draft of the vessel. N c. Subtract the sea water correction . N d. Add the sea water correction. 112: Which chart number indicates an NGA (NIMA) chart designed for inshore coastwise navigation?
N a. LCORR5868 N b. COMBT800564 N c. 17XHA17365 Y d. 16ACO16595 252: A large automated navigational buoy, such as those that have replaced some lightships, would be shown on a chart by which symbol? (D015NG )
N a. A Y b. B N c. C N d. D 283: Loran-C operates on a single frequency centered on __________.
Y a. 100 kHz N b. 500 kHz N c. 1,850 kHz N d. 1,950 kHz 336: You are steaming eastward in the North Atlantic in an extratropical cyclonic storm and the wind is dead ahead. According to the law of Buys Ballot, the center of the low pressure lies __________.
N a. ahead of you N b. astern of you N c. to the north Y d. to the south 347: The illustration shows the symbols used on radio facsimile weather charts. Which of these symbols indicates rain? (D042NG )
Y a. N N b. M N c. I N d. G 448: Mean high water is the reference datum used to measure __________.
N a. soundings on the east coast of the United States N b. soundings in European waters Y c. heights of topographical features in the United States N d. both heights and soundings worldwide 476: Tropical cyclones normally form within which of the following belts of latitude?
Y a. 5° to 15° N b. 15° to 30° N c. 30° to 45° N d. 45° to 60° 496: Severe tropical cyclones (hurricanes, typhoons) occur in all warm-water oceans except the __________.
N a. Indian Ocean N b. North Pacific Ocean N c. South Pacific Ocean Y d. South Atlantic Ocean 527: On 6 June 1983, at 1719 EST (ZD +5), what will be the predicted height of tide at Chester, PA?
N a. 0.8 feet( 0.2 meters) Y b. 1.1 feet (0.3 meters) N c. 3.5 feet (1.1 meters) N d. 4.7 feet (1.4 meters) 547: On 2 November 1983, at 1630 EST (ZD +5), what will be the predicted height of tide at Fulton, FL?
Y a. 2.8 feet (0.8 meters) N b. 3.4 feet (1.0 meters) N c. 4.2 feet (1.3 meters) N d. 5.6 feet (1.7 meters) 602: Between the equator and the 46th parallel of latitude, there are 3099 meridional parts. How many degrees of equatorial longitude does 3099 meridional parts represent?
N a. 35°52'45" Y b. 51°39'00" N c. 74°21'11" N d. 82°36'12" 611: Information markers, when lighted, will display __________.
N a. yellow lights N b. green lights Y c. white lights N d. red lights 681: You sight a spar buoy with the top mark shown in the illustration. You must __________. (D027NG )
N a. pass to the east of the buoy N b. pass to the south of the buoy N c. pass to the north of the buoy Y d. keep well clear of the buoy and pass on either side 778: The navigable semicircle of a hurricane in the Northern Hemisphere is that area of the storm measured __________.
N a. from true north clockwise to 180°T N b. from true north counterclockwise to 180°T N c. from the bow counterclockwise to 180° relative Y d. from the direction of the storm's movement counterclockwise 180° 778: The navigable semicircle of a hurricane in the Northern Hemisphere is that area of the storm measured __________.
N a. from true north clockwise to 180°T N b. from true north counterclockwise to 180°T N c. from the bow counterclockwise to 180° relative Y d. from the direction of the storm's movement counterclockwise 180° 797: Which statement is TRUE concerning the current of the Gulf Stream?
N a. It reaches its daily maximum speed a few hours before the transit of the Moon. N b. It is slower at the time of neap tides than at spring tides. N c. When the Moon is at its maximum declination the stream is narrower than when the Moon is on the equator. Y d. Variations in the trade winds affect the current. 854: The appearance of nimbostratus clouds in the immediate vicinity of a ship at sea would be accompanied by which of the following conditions?
Y a. Rain and poor visibility N b. Dropping barometric pressure and backing wind in the Northern Hemisphere N c. High winds and rising sea N d. Severe thunderstorms 909: What is the average speed of movement of a hurricane prior to recurvature?
N a. 4 to 6 knots N b. 6 to 8 knots Y c. 10 to 12 knots N d. 15 to 20 knots 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 1026: An air mass that has moved down from Canada would most likely have the symbols __________.
N a. mPk Y b. cPk N c. cTk N d. cTw 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 1040: An occluded front is usually caused by a __________.
N a. cold front becoming stationary N b. warm front becoming stationary Y c. cold front overtaking a warm front N d. warm front dissipating 1105: The Light List shows that a navigational light has a nominal range of 22 miles and a height above water of 48 feet (14.6 meters). Your height of eye is 35 feet (10.7 meters) and the visibility is 20.0 miles. At what approximate range will you first sight the light?
N a. 10.5 nm N b. 13.2 nm Y c. 14.7 nm N d. 32.0 nm 1140: What is the light characteristic of a lighted, preferred-channel buoy?
N a. Group flashing Y b. Composite group flashing N c. Interrupted quick flashing N d. Fixed and flashing 1240: Weather information is available from __________.
N a. commercial radio broadcasts N b. the Coast Guard on scheduled marine information broadcasts N c. VHF-FM continuous marine weather broadcasts provided by the National Weather Service Y d. All of the above 1357: You will transit the Cape Cod Canal on 7 November 1983. If you arrive at the R R Bridge at 1655 EST (ZD +5), for what period of time during your transit will you have currents of not more than 0.5 knot?
N a. 1631 to 1719 N b. 1638 to 1655 Y c. 1648 to 1702 N d. 1655 to 1709 1365: The same side of the Moon is always toward the Earth, but more than half of its surface has been seen due to libration. Libration in latitude occurs because __________.
Y a. the axis of rotation is tilted about 6.5° to the axis of revolution N b. the speed of revolution varies, while the rotational speed is essentially constant N c. of the rotational oscillation of the Moon with respect to its radius vector N d. of augmentation 1514: The compass error of a magnetic compass that has no deviation is __________.
N a. zero Y b. equal to variation N c. eliminated by adjusting the compass N d. constant at any geographical location 1526: A single barometric pressure reading of 28.60 indicates __________.
N a. rapidly improving weather N b. deteriorating weather Y c. a severe low pressure system N d. fair weather and calm 1526: A single barometric pressure reading of 28.60 indicates __________.
N a. rapidly improving weather N b. deteriorating weather Y c. a severe low pressure system N d. fair weather and calm 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. 1615: The Illustration shows the symbols used on radio facsimile weather charts. Which symbol indicates snow? (D042NG )
N a. G N b. H Y c. M N d. N 1625: A sling psychrometer is used to measure __________.
N a. seawater temperature N b. engine temperature Y c. dry bulb and wet bulb temperatures N d. barometric pressure 1665: Air circulation is caused or affected by __________.
N a. the rotation of the earth on its axis N b. convection currents caused by differences in radiant heating between equatorial and polar regions N c. mountain ranges Y d. All of the above 1719: What is the direction of rotation of tropical cyclones, tropical storms and hurricanes in the Northern Hemisphere?
N a. Clockwise and outward Y b. Counterclockwise and inward N c. Counterclockwise and outward N d. Clockwise and inward 1826: The illustration represents a fixed C of E lock and dam. What navigational light(s) is(are) exhibited at the position indicated by the letter D in the illustration? (D036NG )
N a. One red light Y b. Two green lights N c. Three green lights N d. No light 1830: A vessel heading NNW is on a course of __________.
N a. 274.5° N b. 292.0° N c. 315.5° Y d. 337.5° 1844: What is the relative bearing of an object sighted dead ahead?
N a. 180° N b. 090° N c. 015° Y d. 000° 1850: A vessel heading WNW is on a course of __________.
N a. 270.0° Y b. 292.5° N c. 315.0° N d. 337.5° 1883: Pressure gradient is a measure of __________.
N a. a high-pressure area Y b. pressure difference over horizontal distance N c. pressure difference over time N d. vertical pressure variation 2001: You have changed course and steadied up on a range. Your heading is 285°T, same as the charted range, and it appears as in illustration D048NG. After several minutes the range appears as in illustration D047NG and your heading is still 285°T. This indicates a __________. (D047NG )
N a. south-setting current Y b. north-setting current N c. leeway caused by a NE'ly wind N d. course made good to the left of the DR track 2097: 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. Sailing Directions Y b. Broadcast Notice to Mariners N c. Light List Vol. V N d. None of the above 2130: You are underway and pass by a lighthouse. Its light, which was white since you first sighted it, changes to red. This means __________.
N a. the light is characterized as alternately flashing N b. the lighthouse has lost power and has switched to emergency lighting N c. it is the identifying light characteristic of the lighthouse Y d. you have entered an area of shoal water or other hazard 2211: What is the length of a nautical mile?
N a. 1,850 meters Y b. 6,076 feet N c. 5,280 feet N d. 2,000 yards 2312: Mars is only seen at two phases, one of which __________.
Y a. is the full phase N b. is conjunction N c. occurs only at sunset or sunrise N d. occurs at or near 0° elongation 2429: The lock chamber is 600 feet X 110 feet. Your towboat is 150 feet X 35 feet. Which of these tows will require a double lockage?
N a. A set-over single N b. 4 standard barges abreast next to your boat's head and 3 jumbo abreast in the lead N c. 6 jumbo (3 abreast and 2 long) with a standard on each side of your boat Y d. 9 jumbo barges 2440: You are on course 357°T and take a relative bearing of a lighthouse of 180°. What is the true bearing to the lighthouse?
N a. 003° N b. 227° Y c. 177° N d. 363° 2522: The letter H in illustration D006NG represents the __________. (D006NG )
N a. celestial horizon N b. geoidal horizon Y c. visible horizon N d. refractive horizon 2526: What is the equivalent of 10 min. 52 sec. in arc units?
N a. 0°47' N b. 1°12' Y c. 2°43' N d. 3°52' 2639: Under the U.S. Aids to Navigation System used on the Western Rivers, aids to navigation lights on the right descending bank show __________.
Y a. white or green lights N b. white or red lights N c. green lights only N d. white lights only 2640: In the celestial equator system of coordinates what is the equivalent to the meridians of the Earth system of coordinates?
N a. Horizon Y b. Hour circles N c. Vertical circles N d. Parallel of declination 2669: Under the IALA Buoyage System, which topmark shown will be displayed on a safe water mark? (D023NG )
Y a. A N b. B N c. C N d. D 2875: A harbor chart could have a scale of __________.
N a. not more than 1:25,000 Y b. 1:35,000 N c. 1:150,000 N d. not less than 1:500,000 2910: You are taking bearings on two known objects ashore. The BEST fix is obtained when the angle between the lines of position is __________.
N a. 60° N b. 45° Y c. 90° N d. 30° 2924: You take a bearing of 264° of a lighthouse. What bearing of another object would give the best fix?
N a. 289° Y b. 350v N c. 081° N d. 120° 3002: The diurnal variation of pressure is most noticeable __________.
N a. above the polar circles N b. in a low pressure area N c. during periods of low temperatures Y d. in the doldrums 3018: You take a bearing of 356° of a lighthouse. Which bearing of another object would give the best fix?
N a. 013° N b. 178° Y c. 256° N d. 342° 3112: With respect to automatic identification systems (AIS) which of the following information is broadcast every one to ten seconds?
N a. Vessel's draft N b. Air Draft Y c. Navigational status N d. Dimensions of vessel