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.
3: Blinking of a Loran-C signal indicates __________.
N a. the signal is in proper sequence N b. there will be no increase or decrease in kHz Y c. there is an error in the transmission of that signal N d. that it has the proper GRI 111: Green lights may appear on __________.
Y a. horizontally banded buoys N b. vertically striped buoys N c. yellow buoys N d. spherical buoys 142: Which nautical charts are intended for coastwise navigation outside of outlying reefs and shoals?
N a. Approach charts Y b. General charts N c. Sailing charts N d. Coastal charts 175: On 5 July 1981, at 1200 zone time, you cross the 180th meridian steaming westward. What is your local time?
N a. It is 1200, 4 July. N b. It is 1200, 5 July. Y c. It is 1200, 6 July. N d. It is 2400, 6 July. 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 193: In using Loran-C, skywave reception gives greater range but is __________.
N a. only accurate during daylight hours Y b. much less accurate N c. only accurate at twilight N d. more accurate than using ground waves 205: The difference between local apparent time (LAT) and local mean time (LMT) is indicated by the __________.
Y a. equation of time N b. difference of longitude between the local and central meridian in time units N c. longitude in time units N d. zone description 242: The difference between the heights of low and high tide is the __________.
Y a. range N b. period N c. depth N d. distance 299: Steady precipitation is typical of __________.
N a. coming cold weather conditions Y b. a warm front weather condition N c. high pressure conditions N d. scattered cumulus clouds 333: Loran-C stations transmit groups of pulses at specific times. The time interval between transmissions from the master station is the __________.
N a. coding delay Y b. group repetition interval N c. pulse interval N d. phase code 490: You are underway on course 050°T and your maximum speed is 10 knots. The eye of a hurricane bears 100°T, 90 miles from your position. The hurricane is moving towards 285°T at 19 knots. Which course should you steer at 10 knots to have the maximum CPA?
N a. 221° Y b. 226° N c. 233° N d. 238° 538: Which symbol shown represents a stationary front? (D018NG )
Y a. A N b. B N c. C N d. D 546: If it is impossible to avoid a hurricane in the Northern Hemisphere, the most favorable place to be when the storm passes is in __________.
N a. the dangerous semicircle N b. the eye (center) of the storm N c. that half of the storm lying to the right of the storm's path Y d. that half of the storm lying to the left of the storm's path 577: Your vessel has a draft of 24 feet. On 7 April 1983 you wish to pass over a temporary obstruction near Lovell Island, MA, that has a charted depth of 22 feet. Allowing for a safety margin of 3.1 feet under your keel, what is the earliest time after 0100 EST (ZD +5) that this passage can be made?
N a. 0248 N b. 0304 Y c. 0342 N d. 0356 610: The apparent wind's speed can be zero, but only when two conditions are present. One condition is that the true wind __________.
N a. must be from dead ahead N b. speed must be zero Y c. must be from dead astern N d. must be on the beam 626: What indicates the arrival of a hurricane within 24 to 36 hours?
N a. The normal swell becoming lower and from a steady direction N b. Long bands of nimbostratus clouds radiating from a point over the horizon N c. The barometer drops 2 millibars between 1000 and 1600 Y d. Unusually good weather with above average pressures followed by a slow fall of 4 millibars in six hours 650: What classification of tropical cyclone would have closed isobars, counter clockwise rotary circulation, and sustained winds between 34 and 63 knots?
N a. A tropical disturbance N b. A tropical depression Y c. A tropical storm N d. A hurricane 656: In the Northern Hemisphere you are caught in the dangerous semicircle with plenty of sea room available. The best course of action is to bring the wind on the __________.
Y a. starboard bow and make as much headway as possible N b. starboard quarter, and make as much headway as possible N c. port quarter, and make as much headway as possible N d. port bow, and make as much headway as possible 686: The pressure gradient between the horse latitudes and doldrums runs __________.
N a. east to west Y b. north to south N c. northeast to southwest N d. northwest to southeast 711: In the IALA Maritime Buoyage System, a red and white vertically-striped buoy is used as a(n) __________.
Y a. safe water mark N b. cardinal mark N c. isolated danger mark N d. special mark not primarily used for navigation 716: Standard atmospheric pressure in inches of mercury is __________.
N a. 30.00 N b. 28.92 Y c. 29.92 N d. 29.00 730: In the Northern Hemisphere, the largest waves or swells created by a typhoon or hurricane will be located __________.
N a. in the southeast quadrant of the storm N b. directly behind the storm center Y c. forward and to the right of its course N d. behind and to the left of its course 752: Which publication would NOT be used on a voyage from Houston to New York?
N a. Coast Pilot N b. Light List N c. Radio Navigational Aids Y d. Sailing Directions (Enroute) 787: You are on a voyage from New Orleans to Boston. When navigating off the Florida coast, you will get the greatest benefit from the Gulf Stream if you navigate __________.
Y a. about 45 miles east of Cape Canaveral N b. about 25 miles east of Daytona Beach N c. along the 50-fathom curve N d. close inshore between Fowey Rocks and Jupiter Inlet 830: The highest frequency of tropical cyclones in the North Atlantic Ocean occurs during __________.
N a. January, February and March N b. April, May and June Y c. August, September and October N d. July, November and December 878: At 0600 ZT on 31 January, your position is LAT 00°49'S, LONG 84°27'E. You are preparing a weather report form, WS Form B-80. How should you encode the first three groups after the call sign if you estimate the wind? (D041NG )
N a. 30243, 90008, 30848 N b. 31003, 99049, 38427 Y c. 31003, 99008, 30844 N d. 31063, 99049, 58427 1115: Which light characteristic may be used on a special purpose mark?
Y a. Flashing N b. Occulting N c. Equal interval N d. Quick flashing 1189: Concerning a celestial observation, the azimuth angle is measured from the principal vertical circle to the ____________ .
N a. Greenwich celestial meridian N b. hour circle of the body N c. local celestial meridian Y d. vertical circle of the body 1241: Which picture shows a fixed and flashing light? (D034NG )
Y a. A N b. B N c. C N d. D 1248: On 6 July 1983, at 1520 DST (ZD +4) what will be the predicted height of tide at Newburgh, NY?
N a. 2.1 feet N b. 1.7 feet N c. 1.2 feet Y d. 0.6 foot 1467: Determine the time after 0730 EST (ZD +5) when the velocity of the current will be 2.1 knots on 26 March 1983, at Fort Pulaski, GA.
N a. 0802 N b. 0812 N c. 0821 Y d. 0840 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. 1523: Which is a characteristic of the weather preceding an approaching warm front?
N a. Gusty winds Y b. Steadily falling barometric pressure N c. Decreasing relative humidity N d. Clearing skies 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 1642: Which type of cloud formation should be of immediate concern to small craft operators?
N a. cirrus N b. altostratus N c. nimbostratus Y d. cumulonimbus 1655: Yesterday your chronometer read 11h 59m 59s at the 1200 GMT time tick. Today the chronometer reads 11h 59m 57s at the 1200 time tick. What is the chronometer rate?
N a. +2s Y b. -2s N c. -3s N d. +3s 1662: Fog generally clears when the __________.
N a. wind speed increases N b. wind direction changes N c. temperature increases Y d. All of the above 1678: Which information is NOT provided in broadcasts by the National Institute of Standards and Technology?
N a. Storm Warnings N b. Time Announcements N c. GPS Information Y d. NAVAREA Warnings 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. 1710: A gale is characterized by a wind speed of __________.
N a. 10 to 20 knots Y b. 34 to 47 knots N c. 48 to 63 knots N d. 64 to 83 knots 1771: Which type of precipitation is a product of the violent convection found in thunderstorms?
N a. Snow N b. Freezing Rain Y c. Hail N d. Sleet 1831: 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. red conical buoy N b. black can buoy Y c. red can buoy N d. black conical buoy 1842: What is the major problem with taking high altitude observations?
N a. Possible errors due to unusual refraction may exist. N b. The tables are not as accurate due to inherent errors in the spherical triangle at high altitudes. N c. Rapidly changing altitudes make it difficult to get an accurate altitude. Y d. It is difficult to establish the point where the sextant is vertical to the horizon. 1923: Little or no change in the barometric reading over a twelve hour period indicates __________.
N a. stormy weather is imminent Y b. that present weather conditions will continue N c. a defect in the barometer N d. increasing wind strength 2165: The illustration 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 B if the lock walls and piers are not awash? (D037NG )
Y a. Three red lights N b. Two red lights N c. One red light N d. One amber light 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 2210: A dead reckoning (DR) plot __________.
Y a. ignores the effect of surface currents N b. is most useful when in sight of land N c. must be plotted using magnetic courses N d. may be started at an assumed position 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 2288: A mean sun is used as the reference for solar time for three reasons. Which reason is NOT a cause for use of a mean sun?
N a. The motion of the apparent sun is along the ecliptic. Y b. Measurement of time is along the celestial equator. N c. The speed of the Earth's revolution is not constant. N d. There are variations in the Earth's rotational speed. 2300: When a magnetic compass is not in use for a prolonged period of time it should __________.
Y a. be shielded from direct sunlight N b. be locked into a constant heading N c. have any air bubbles replaced with nitrogen N d. have the compensating magnets removed 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 2520: When correcting the sextant altitude to apparent altitude you are correcting for inaccuracies in the reference level and __________.
N a. the equivalent reading to the center of the body N b. the equivalent reading from the center of the Earth Y c. for inaccuracies in the instrument N d. the bending of the rays of light from the body 2529: A bridge over a navigable waterway is being repaired. There is a traveler platform under the bridge's deck that significantly reduces the vertical clearance. If required by the CG district commander, how will this be indicated at night?
N a. Illumination by flood lights Y b. A quick flashing red light at each lower corner N c. A strobe light visible both up and downstream N d. Fixed amber lights under the extreme outer edges of the traveler 2604: A sidereal day is approximately how much shorter than a solar day?
Y a. 4 minutes N b. 8 minutes N c. 12 minutes N d. 16 minutes 2664: The Light List shows a lighted aid to navigation on the right bank. This means that the light can be seen on the port side of a vessel __________.
N a. crossing the river N b. descending the river Y c. ascending the river N d. proceeding towards sea 2711: Information about currents on the Pacific Coast of the U. S. are found in the __________.
Y a. Tidal Current Tables N b. Nautical Almanac N c. Tide Tables N d. Ocean Current Tables 2831: A coastal chart could have a scale of __________.
N a. not more than 1:25,000 N b. 1:35,000 Y c. 1:100,000 N d. 1:500,000 2832: The Light List indicates that a dayboard is a type MR. You should __________.
Y a. leave it on either side N b. look for the other dayboard forming the range N c. look for an all red daymark N d. check to enter the correct channel at this junction daymark 2937: The depth of the water is indicated on a chart as 32 meters. This is equal to __________.
N a. 11.50 fathoms N b. 12.62 fathoms Y c. 17.50 fathoms N d. 104.99 fathoms 3061: In a river subject to tidal currents, the best time to dock a ship without the assistance of tugs is __________.
N a. at flood tide N b. at high water N c. when there is a following current Y d. at slack water