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.
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 126: A katabatic wind blows __________.
N a. up an incline due to surface heating N b. in a circular pattern Y c. down an incline due to cooling of the air N d. horizontally between a high and a low pressure area 150: An alternating light __________.
N a. shows a light with varying lengths of the lighted period Y b. shows a light that changes color N c. marks an alternate lesser-used channel N d. is used as a replacement for another light 286: On the pole side of the trade wind belt, there is an area of high pressure with weak pressure gradients and light, variable winds. This area is called the __________.
N a. prevailing westerlies N b. geostrophic winds N c. doldrums Y d. horse latitudes 290: The true wind is from 330°T, speed 6 knots. You want the apparent wind to be 30 knots from 10° on your port bow. To what course and speed must you change?
N a. Cn 240°, 28.0 knots N b. Cn 270°, 28.0 knots N c. Cn 180°, 30.0 knots Y d. Cn 090°, 32.5 knots 452: When navigating in high latitudes and using a chart based on a Lambert conformal projection, __________.
Y a. a straight line drawn on the chart approximates a great circle N b. the chart should not be used outside of the standard parallels N c. the course angle is measured at the mid-longitude of the track line N d. distance cannot be measured directly from the chart 462: For what purpose would using a Lambert conformal chart be more convenient than using a Mercator?
Y a. Plotting radio bearings over a long distance N b. Determining latitude and longitude of a fix N c. Measuring rhumb line distances N d. Measuring rhumb line directions 539: You are underway on course 050°T and your maximum speed is 13 knots. The eye of a hurricane bears 120°T, 100 miles from your position. The hurricane is moving towards 265°T at 25 knots. What course should you steer at 13 knots to have the maximum CPA?
Y a. 324°T N b. 306°T N c. 299°T N d. 276°T 541: A yellow buoy may mark a(n) __________.
N a. wreck N b. shoal area Y c. anchorage area N d. middle ground 601: White and orange buoys, if lighted, show which color light?
Y a. White N b. Orange N c. Red N d. Alternating yellow and white 619: According to Buys Ballot's Law, when an observer in the Southern Hemisphere experiences a northwest wind, the center of the low pressure is located to the __________.
N a. east-northeast Y b. south-southwest N c. east-southeast N d. west-southwest 622: The scale of a Mercator projection is 4 inches equals 1°LONG. What is the expansion in inches between the 60th and 61st parallels?
Y a. 8.11 inches N b. 7.70 inches N c. 7.48 inches N d. 6.98 inches 746: Lines drawn through points on the Earth having the same atmospheric pressure are known as __________.
N a. isothermal N b. millibars Y c. isobars N d. seismics 807: The approximate mean position of the axis of the Gulf Stream east of Palm Beach, FL, is __________.
N a. 35 nautical miles N b. 25 nautical miles Y c. 15 nautical miles N d. 5 nautical miles 850: When is the peak of the hurricane season in the western North Pacific?
N a. January through March N b. April through June Y c. July through October N d. November through December 870: Vessels should maintain a sharp lookout, especially during December through March, when navigating the right whale's only known calving grounds which lie off the coasts of __________.
N a. Nova Scotia N b. Maine and Massachusetts Y c. Georgia and NE Florida N d. California and Mexico 904: All of the following are associated with cumulonimbus clouds EXCEPT __________.
Y a. steady rainfall N b. hail storms N c. thunderstorms N d. tornadoes or waterspouts 913: How many points are there in a compass card?
N a. 4 N b. 8 N c. 24 Y d. 32 963: To center a compass bowl in its binnacle, you should have the ship on an even keel, heading north or south, and adjust the screws until __________.
N a. the compass heading is in line with the lubber's line N b. there is no lost motion in the gimbal rings Y c. no change of heading by compass is observed if you raise and lower the heeling magnet N d. the gimbal rings do not strike the compass frame when they are tilted 1038: You are preparing a weather report form, WS Form B-80. The dry bulb thermometer reads 54°F, and the wet bulb thermometer reads 50°F. How would you encode the air temperature groups in the report? (D041NG )
N a. 1054/, 2050/ Y b. 10122, 2008/ N c. 1054/, 2047/ N d. 054//, 047// 1070: Chart legends which indicate a conspicuous landmark are printed in __________.
N a. underlined letters Y b. capital letters N c. italics N d. boldface print 1096: With the passage of an occluded front the temperature __________.
N a. rises rapidly N b. remains about the same N c. drops rapidly Y d. depends on whether warm type or cold type occlusion 1116: When a cold air mass and a warm air mass meet, and there is no horizontal motion of either air mass, it is called a(n) __________.
N a. cold front N b. occluded front Y c. stationary front N d. warm front 1172: Which position shown would likely have stratus or stratocumulus clouds, occasional light drizzle, steady southerlies around 10 knots, and steady temperatures? (D049NG )
N a. B N b. C N c. D Y d. E 1265: When reporting wind direction, you should give the direction in __________.
Y a. true degrees N b. magnetic compass degrees N c. relative degrees N d. isobaric degrees 1273: Deviation changes with a change in __________.
N a. latitude Y b. heading N c. longitude N d. sea conditions 1303: Compass deviation is caused by __________.
N a. magnetism from the earth's magnetic field N b. misalignment of the compass Y c. magnetism within the vessel N d. a dirty compass housing 1329: Yesterday your chronometer read 03h 01m 56s at the 1500 GMT time tick. Today your chronometer read 03h 01m 54s at the 1500 GMT time tick. What is the chronometer rate?
N a. 1m 54s fast N b. 2s fast Y c. -2s N d. +2s 1482: Which statement concerning current is TRUE?
N a. Current can be determined by measuring the direction and distance between simultaneous EP and DR positions. Y b. The drift of the current should be averaged out on a one hour basis. N c. After the current is determined, it should not be used for further plotting because it is an unknown variable. N d. The distance between a simultaneous DR position and fix is equal to the drift of the current. 1561: You are sailing south on the Intracoastal Waterway (ICW) when you sight a red nun buoy with a yellow square painted on it. Which statement is TRUE?
N a. The buoy is off station and should be ignored as a navigational mark. N b. The waterway in that area has shoaled and the available depth of water is less than the project depth. N c. ICW traffic should not proceed beyond the buoy unless the crossing waterway is clear of all traffic. Y d. You should leave the buoy to port. 1639: Sextant D reads __________. (D043NG )
N a. 30°47.5' N b. 29°47.5' Y c. 29°42.5' N d. 29°41.6' 1651: From which type of cloud can a tornado or waterspout develop?
N a. Nimbostratus N b. Altostratus Y c. Cumulonimbus N d. Cirrus 1681: You can expect frontal activity when two air masses collide and __________.
N a. their barometric pressures and temperatures are the same N b. there are differences in how they track along the jet stream N c. there are no significant differences between their temperatures and moisture content Y d. there are significant differences between the temperature of each air mass 1716: The hurricane season in the North Atlantic Ocean reaches its peak during the month of __________.
N a. June Y b. September N c. November N d. July 1803: The difference between the DR position and a fix, both of which have the same time, is caused by __________.
N a. variation N b. deviation Y c. current N d. leeway 1805: A phenomenon where the atmospheric pressure is higher than that of other surrounding regions is called __________.
N a. the "trade winds" N b. a low front or an occluded front N c. the doldrums Y d. a "high" 1805: A phenomenon where the atmospheric pressure is higher than that of other surrounding regions is called __________.
N a. the "trade winds" N b. a low front or an occluded front N c. the doldrums Y d. a "high" 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) 1885: Under the Uniform State Waterway Marking System a mooring buoy is painted __________.
Y a. white with a blue band N b. yellow N c. any color that does not conflict with the lateral system N d. white with a green top 2000: A vessel heading SE is on a course of __________.
N a. 112.5° Y b. 135.0° N c. 157.5° N d. 180.0° 2074: When approaching a lock and at a distance of not more than a mile, vessels desiring a single lockage shall sound which signal?
Y a. One long blast followed by one short blast N b. One short blast followed by one long blast N c. Two short blasts N d. Two long blasts 2084: You are approaching Gallipolis Lock and Dam. The traffic signal light is flashing red. You should __________.
Y a. hold your position and not attempt to enter the lock N b. approach the lock slowly under full control N c. proceed at normal speed to enter the lock N d. None of the above 2169: 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?
Y a. 30 minutes before the predicted time N b. One hour after the predicted time N c. At the predicted time N d. 30 minutes before flood, one hour after ebb 2174: By convention, the Earth's north magnetic pole is colored __________.
N a. red N b. white Y c. blue N d. black 2188: A vessel is heading magnetic north and its magnetic compass indicates a heading of 003°. What action should be taken to remove this error during compass adjustment?
Y a. If the red ends are to starboard the athwartships magnets should be lowered. N b. If the blue ends are forward the fore-and-aft magnets should be raised. N c. If the red ends are to starboard and the tray is at the top add some athwartships magnets. N d. If the blue ends are aft the fore-and-aft magnets should be raised. 2409: You are approaching the first of two drawbridges that span a narrow channel. The second drawbridge is close to the first. Which signals should you sound?
N a. Sound the request-for-opening signal for the first bridge only, who will notify the second bridge of your approach N b. Sound the request-for-opening signal twice in succession to indicate you must pass through both bridges N c. Sound the request-for-opening signal, pause for about 10 seconds, then sound two prolonged blasts. Y d. Sound the request-for-opening signal and, after the bridge acknowledges it, sound the request-for-opening signal for the second bridge. 2414: You must construct a Mercator plotting sheet on a piece of paper measuring 20" by 28". The area includes latitude 38°S to 43°S and longitude 178°E to 175°W. Allow a one-half inch neat line on all sides. What is the maximum distance between each degree of longitude that will permit the area of the plotting sheet to be drawn within the stated limitations?
N a. 2.6 inches Y b. 2.9 inches N c. 3.2 inches N d. 3.5 inches 2462: Under ideal viewing conditions, the dimmest star that can be seen with the unaided eye is of what magnitude?
N a. First N b. Third N c. Fourth Y d. Sixth 2496: An orange and white buoy marking a danger area will have what symbol on it?
Y a. Open-faced diamond N b. Diamond with a cross N c. Circle N d. Square 2508: Normal pool elevation is the height in feet of the section of river above a dam. This height is measured from __________.
N a. low steel on the Huey P. Long Bridge Y b. mean sea level N c. the local water table N d. the minimum dam control level 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 2583: You are in the Northern Hemisphere and a tropical wave is located 200 miles due west of your position. Where will the wave be located 24 hours later?
N a. In the same place N b. Closer and to the west N c. Closer and to the east Y d. Farther away to the west 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 2673: A bluff bar is a bar __________.
N a. extending out from a bluff alongside the river N b. that tends to give a false indication of its position Y c. that has a sharp drop off into deep water N d. that is perpendicular to the current 2821: The height of tide is the __________.
N a. difference between the depth of the water at high tide and the depth of the water at low tide N b. depth of water at a specific time due to tidal effect Y c. difference between the depth of the water and the area's tidal datum N d. difference between the depth of the water and the high water tidal level 2902: The direction a vessel is pointed at any given time is the __________.
N a. course N b. track Y c. heading N d. course over the ground 2922: The Light List indicates that a dayboard is a type TR-SY. You should __________.
N a. look for a dayboard of type TR-TY to form a range Y b. leave it to port when southbound on the Atlantic portions of the ICW N c. pass it close aboard on either side N d. expect a daymark with no lateral significance 2962: While navigating in fog off a coastline of steep cliffs, you hear the echo of the ship's fog horn 4 1/2 seconds after the signal was sounded. What is the distance to the shore?
N a. 405 yards N b. 628 yards N c. 730 yards Y d. 825 yards 3064: ECDIS units incorporate Digital Chart Data Formats, which include __________.
N a. vector only N b. raster only Y c. vector and raster N d. imposed viewing 3103: In general, on how many radio channels will an automatic identification system (AIS) operate?
N a. 1 Y b. 3 N c. 4 N d. 12