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.
35: You are on a vessel at 0400 ZT on 3 July, and the ZD for your position is -8. What is the GMT?
N a. 1200, 3 July N b. 2000, 3 July N c. 1200, 2 July Y d. 2000, 2 July 80: When the moon is at first quarter or third quarter phase, what type of tides will occur?
N a. Apogean N b. Perigean Y c. Neap N d. Spring 146: What change in the wind direction could be expected at position "D" if the low were moving northeasterly? (D049NG )
Y a. Veering to the west N b. Backing to the north N c. Veering to the north N d. Backing to the east 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° 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 422: If you are sailing from the East Coast of the United States to the Caribbean Sea, which publication would contain information on weather, currents, and storms?
N a. Sailing Charts of the Caribbean Sea Y b. Pilot Charts of the North Atlantic N c. Light Lists, Atlantic and Gulf Coast N d. Tidal Current Tables 465: When applying a dip correction to the sighted sextant angle (hs), you always subtract the dip because you are correcting __________.
N a. hs to the visible horizon Y b. hs to the sensible horizon N c. hs to the celestial horizon N d. Ho to the celestial horizon 507: What will be the time after 1000 EST (ZD +5), on 4 March 1983, that the height of the tide at City Island, NY, will be 2.4 feet?
Y a. 1228 N b. 1240 N c. 1244 N d. 1248 536: You are enroute from Puerto Rico to New York. A hurricane makes up and is approaching. If the wind veers steadily, this indicates that your vessel is __________.
Y a. in the dangerous semicircle N b. in the navigable semicircle N c. directly in the path of the storm N d. in the storm center 544: The instrument most commonly used to gather the data for determining the relative humidity is the __________.
N a. hydrometer Y b. psychrometer N c. barometer N d. anemometer 633: You have another ship overtaking you close aboard to starboard. You have 3 radar targets bearing 090° relative at ranges of .5 mile, 1 mile, and 1.5 miles. In this case, the unwanted echoes are called __________.
Y a. multiple echoes N b. spoking N c. indirect echoes N d. side-lobe echoes 633: You have another ship overtaking you close aboard to starboard. You have 3 radar targets bearing 090° relative at ranges of .5 mile, 1 mile, and 1.5 miles. In this case, the unwanted echoes are called __________.
Y a. multiple echoes N b. spoking N c. indirect echoes N d. side-lobe echoes 690: What level of development of a tropical cyclone has a hundred mile radius of circulation, gale force winds, less than 990 millibars of pressure and vertically formed cumulonimbus clouds?
N a. A tropical disturbance N b. A tropical depression Y c. A tropical storm N d. A typhoon 748: You are steaming west in the South Atlantic in an extratropical cyclonic storm, and the wind is dead ahead. According to the law of Buys Ballot, the center of low pressure lies __________.
N a. to the north of you Y b. to the south of you N c. dead ahead of you N d. dead astern of you 767: What describes a flood current?
N a. Horizontal movement of the water toward the land after high tide Y b. Horizontal movement of the water toward the land after low tide N c. Horizontal movement of the water away from the land following high tide N d. Horizontal movement of the water away from the land following low tide 776: You are navigating in pilotage waters using running fixes. The maximum time between fixes should be about __________.
N a. 4 hours N b. 1 hour Y c. 30 minutes N d. 5 minutes 815: When entering from seaward, a buoy displaying a composite group (2+1) flashing red light indicates __________.
Y a. a junction with the preferred channel to the left N b. a sharp turn in the preferred channel to the right N c. the starboard side of the secondary channel N d. a wreck to be left on the vessel's port side 838: A navigator fixing a vessel's position by radar __________.
N a. must use information from targets forward of the beam N b. should never use radar bearings N c. should only use radar bearings when the range exceeds the distance to the horizon Y d. can use radar information from one object to fix the position 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 974: Which cloud commonly produces a halo about the Sun or Moon?
Y a. Cirrostratus N b. Cirrocumulus N c. Altostratus N d. Altocumulus 998: The navigable semicircle of a tropical storm in the South Indian Ocean is located on which side of the storm's track?
N a. Rear N b. Front N c. Left Y d. Right 1020: 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 40 feet (12.2 meters) and the visibility is 27.0 miles. At which approximate range will you first sight the light?
N a. 5.6 miles N b. 6.4 miles Y c. 9.8 miles N d. 12.1 miles 1044: The dry-bulb temperature is 78°F and the wet-bulb temperature is 62°F. What is the relative humidity?
N a. 16% N b. 24% Y c. 39% N d. 79% 1230: Weather forecast messages are usually __________.
N a. given only to TV stations N b. transmitted only by commercial broadcast stations Y c. broadcast in plain language N d. broadcast immediately on VHF Channel 16 and 2182 kHz 1234: Which information does the outer ring of a compass rose on a nautical chart provide?
N a. Variation Y b. True directions N c. Magnetic directions N d. Annual rate of variation change 1243: Magnetic heading differs from compass heading by __________.
N a. compass error N b. true heading N c. variation Y d. deviation 1389: A boundary between two air masses is a(n) __________.
N a. lapse rate N b. isobar Y c. front N d. continent 1403: Which statement about the gyrocompass is FALSE?
Y a. Its accuracy remains the same at all latitudes. N b. It seeks the true meridian. N c. It can be used near the Earth's magnetic poles. N d. If an error exists, it is the same on all headings. 1408: An occluded front is caused by a(n) __________.
N a. low pressure area N b. high pressure area N c. area of calm air Y d. cold front overtaking a warm front 1463: If the gyrocompass error is east, what describes the error and the correction to be made to gyrocompass headings to obtain true headings?
Y a. The readings are too low (small numerically) and the amount of the error must be added to the compass to obtain true N b. The readings are too low and the amount of the error must be subtracted from the compass to obtain true N c. The readings are too high (large numerically) and the amount of the error must be added to the compass to obtain true N d. The readings are too high and the amount of the error must be subtracted from the compass to obtain true 1486: Which condition would most likely result in fog?
Y a. Warm moist air blowing over cold water N b. Airborne dust particles N c. Warm moist air blowing over warm water N d. Dew point falling below the air temperature 1578: The LMT of sunrise on the standard meridian is 0552. Your longitude is 99°15'E. What is your ZT of sunrise?
N a. 0512 N b. 0529 N c. 0552 Y d. 0615 1578: The LMT of sunrise on the standard meridian is 0552. Your longitude is 99°15'E. What is your ZT of sunrise?
N a. 0512 N b. 0529 N c. 0552 Y d. 0615 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 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 1626: Which instrument is used to measure the relative humidity of the air?
N a. A hydrometer Y b. A hygrometer N c. A spectrometer N d. A barograph 1676: Lighted information markers show __________.
N a. green lights Y b. white lights N c. yellow lights N d. red lights 1811: To find a magnetic compass course from a true course you must apply __________.
N a. deviation Y b. deviation and variation N c. variation N d. magnetic anomalies (local disturbances) 2081: 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. 30° N b. 45° N c. 60° Y d. 90° 2116: Vessels regularly navigating rivers above Cairo, Illinois, shall at all times have on board a copy of the __________.
N a. Nautical Almanac for the year Y b. U.S. Army Corps of Engineers Regulations (Blue Book) N c. Sailing Directions N d. All of the above 2159: Induced magnetism is found in __________.
N a. hard iron Y b. soft iron N c. vertical iron only N d. horizontal iron only 2187: The diagram 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? (D037NG )
N a. No lights N b. Three red lights N c. Two red lights Y d. One red lights 2243: Which aid is NOT marked on a chart with a magenta circle?
N a. Radar station N b. Radar transponder beacon Y c. Aero light N d. Radio beacon 2259: A vessel is heading magnetic northwest and its magnetic compass indicates a heading of 317°. What action should be taken to remove this error during compass adjustment?
N a. If the quadrantal spheres are out as far as possible replace them with smaller spheres. N b. If the quadrantal spheres are in as far as possible remove one of the spheres. N c. If the quadrantal spheres are in as far as possible replace them with smaller spheres. Y d. If the quadrantal spheres are out as far as possible, move the quadrantal spheres in. 2406: The dividing meridian between zone descriptions +4 and +5 is __________.
Y a. 67°30'W N b. 90°00'W N c. 67°30'E N d. 75°00'E 2546: A structure, usually made of stone, or cement pilings, which extends from the bank at approximately right angles to the current is called a __________.
Y a. dike N b. revetment N c. cutoff N d. crib 2619: In low latitudes, a first quarter Moon will always rise at about __________.
N a. sunrise Y b. 1200 LMT N c. sunset N d. 2400 LMT 2707: You will find information about the duration of slack water in the __________.
Y a. Tidal Current Tables N b. Tide Tables N c. American Practical Navigator N d. Sailing Directions 2714: A current moving across a lock entrance toward the river or toward the dam is called a(n) __________.
N a. cutoff Y b. outdraft N c. lockwash N d. springpool 2742: A white diamond daymark with an orange border is a(n) __________.
N a. special mark Y b. information or regulatory mark N c. lateral aid on the intracoastal waterway N d. safe water mark 2780: You are pushing a tow ahead and passing close to another towboat which is pushing ahead in the same direction (you are overtaking). After the towheads pass close alongside __________.
N a. you will gain speed N b. both boats will gain speed N c. the tows will tend to drift apart Y d. the tows will tend to drift together 2824: When you turn on the fast time constant (differentiator) control of a radar it will __________.
N a. enhance weak target echoes and brighten them on the PPI Y b. reduce clutter over the entire PPI by shortening the echoes N c. only suppress weak targets to a limited distance from the ship (sea clutter) N d. reduce the beam width to provide a map-like presentation for navigation 2829: A spar buoy is indicated by which letter in illustration D044NG?
N a. A Y b. B N c. C N d. D 2830: The proper way to approach a downstream lock where there is an outdraft is to be __________.
N a. wide out from the land wall, keeping the stern in at all times N b. wide out from the land wall, keeping the stern out at all times Y c. close in to the land wall, keeping the stern in at all times N d. close in to the land wall, keeping the stern out at all times 2899: You take a bearing of 043° and 169° of two objects. What bearing of a third object will give the best fix?
N a. 356° N b. 073° N c. 192° Y d. 309° 2916: You take a bearing of 191° and 313° to two objects. Which bearing of a third object will give the best fix?
N a. 022° N b. 131° N c. 211° Y d. 249° 2956: On 23 August 1981 you observe a back sight of the upper limb of the Sun. The sextant altitude (hs) is 116°42.8'. The height of eye is 56 feet and the index error is 2.0' off the arc. What is the observed altitude (Ho)?
N a. 63°42.0' N b. 63°38.0' N c. 63°19.4' Y d. 63°06.2' 2986: Some places maintain a zone time of -13. What are the time and date at Greenwich if the zone time and date are 2152, 10 January?
N a. 1052, 9 January Y b. 0852, 10 January N c. 1052, 10 January N d. 1052, 11 January 3003: The height of tide is the __________.
Y a. difference between the depth of the water and the area's tidal datum N b. depth of water at a specific time due to tidal effect N c. difference between the depth of the water and the high water tidal level N d. difference between the depth of the water at high tide and the depth of the water at low tide 3068: Which of the following data layer categories is NOT displayed on ECDIS?
N a. Notice to Mariners information N b. ECDIS warnings and messages Y c. Ship hydrodynamic information N d. Hydrographic Office data