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 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 156: In reading a weather map, closely spaced pressure gradient lines would indicate __________.
Y a. high winds N b. high overcast clouds N c. calm or light winds N d. fog or steady rain 210: The position labeled C is a(n) __________. (D051NG )
N a. fix Y b. running fix N c. estimated position N d. dead reckoning position 250: Weather systems in the middle latitudes generally travel from __________.
Y a. west to east N b. east to west N c. north to south N d. None of the above 259: The Illustration shows the symbols used on radio facsimile weather charts. The symbol indicated at letter "Q" represents a __________. (D042NG )
N a. convergence zone N b. squall line Y c. convergence line N d. weather boundary 309: You are underway on course 050°T and your maximum speed is 12 knots. The eye of a hurricane bears 120°T, 110 miles from your position. The hurricane is moving towards 285°T at 25 knots. What course should you steer at 12 knots to have the maximum CPA?
N a. 332° N b. 339° Y c. 346° N d. 357° 493: The picture shown represents the geographic location of a vessel and the radar presentation at the same time. Which statement is TRUE? (D011NG )
N a. Ship No. 1 is not detected due to the shadow effect of the headland. N b. The small island is not detected due to the effect of beam width. Y c. A tangent bearing of the headland to the south-southeast should be corrected by adding one-half of the beam width. N d. Ship No. 2 is not detected due to the reflective mass of the background mountain overpowering the ship's reflective signals. 541: A yellow buoy may mark a(n) __________.
N a. wreck N b. shoal area Y c. anchorage area N d. middle ground 572: You wish to measure the distance on a Mercator chart between a point in latitude 43°30'N and a point in latitude 40°30'N. To measure 30 miles at a time, you should set the points of the dividers at __________.
N a. 41°30' and 42°00' Y b. 41°45' and 42°15' N c. 42°00' and 42°30' N d. 42°15' and 42°45' 657: Current refers to the __________.
N a. vertical movement of the water Y b. horizontal movement of the water N c. density changes in the water N d. None of the above 663: You are underway at 10 knots. At 1800 you note a radar contact dead ahead at a range of 10 miles. At 1812 the contact is dead ahead at a range of 8 miles. The estimated speed of the contact is __________.
Y a. dead in the water N b. 5 knots N c. 10 knots N d. 15 knots 765: Diurnal aberration is due to __________.
N a. motion of the Earth in its orbit Y b. rotation of the Earth on its axis N c. the body's orbital motion during the time required for its light to reach the Earth N d. a false horizon 817: Which current would you encounter on a direct passage from London, England, to Cape Town, South Africa?
N a. Falkland Current N b. Brazil Current N c. Norway Current Y d. Benguela Current 824: An "atoll cloud" forming over an island due to heating of the land during the daytime would be which type?
N a. Cirrus Y b. Cumulus N c. Stratus N d. Nimbus 840: Which position includes the effects of wind and current?
Y a. Estimated position N b. Set position N c. Leeway position N d. Dead reckoning position 858: Your ship is proceeding on course 320°T at a speed of 25 knots. The apparent wind is from 30° off the starboard bow, speed 32 knots. What is the relative direction, true direction and speed of the true wind?
Y a. Relative 80°true 040°T, 16.2 knots N b. Relative 40°true 080°T, 16.4 knots N c. Relative 80° true 060°T, 15.2 knots N d. Relative 60°true 040°T, 18.6 knots 861: You would expect to find channels marked with the IALA-A Buoyage System in __________.
N a. Argentina N b. Japan Y c. India N d. Canada 867: Which ocean current is "warm" based on the latitude in which it originates and on the effect it has on climate?
Y a. Kuroshio Current N b. Benguela Current N c. Peru Current N d. California Current 868: Your ship received a HYDROLANT advising of a special warning to mariners from the Department of State for ships in the Persian Gulf. You are 400 miles south of, and bound for, the Persian Gulf. What action should you take?
N a. Continue on course as the warning is advisory in nature only. Y b. Send an AMVER report and acknowledge receipt of the warning. N c. Remain a minimum of 500 miles outside the Persian Gulf and maintain radio silence. N d. Send a MERWARN message advising your position, course, speed and intentions. 910: The Light List shows that a navigational light has a nominal range of 12 miles and a height above water of 25 feet (7.6 meters). Your height of eye is 38 feet (11.6 meters) and the visibility is 5.5 miles. At what approximate range will you FIRST sight the light?
N a. 5.5 miles N b. 6.3 miles Y c. 8.0 miles N d. 12.0 miles 922: How is the intensity of a light expressed in the Light Lists?
N a. Luminous range N b. Geographic range Y c. Nominal range N d. Meteorological range 926: When a low pressure area is approaching, the weather generally __________.
N a. improves Y b. worsens N c. remains the same N d. is unpredictable 933: How many degrees are there on a compass card?
Y a. 360° N b. 380° N c. 390° N d. 420° 1030: You are preparing a weather report form, WS Form B-80. The dry bulb thermometer reads 78°F, and the wet bulb thermometer reads 75°F. How would you encode the air temperature groups in the report? (D041NG )
Y a. 10256, 2023/ N b. 10780, 2074/ N c. 00256, 0023/ N d. 10256, 2074/ 1053: Before a magnetic compass is adjusted certain correctors must be checked to ensure that they are free of permanent magnetism. These correctors are the __________.
N a. fore-and-aft and athwartships magnets N b. dip needle and heeling magnet N c. heeling magnet and Flinders bar Y d. Flinders bar and quadrantal spheres 1146: What is true about a front?
N a. A front is a boundary between two air masses. N b. There are abrupt temperature differences on opposite sides of a front. N c. The pressure tendencies are different on opposite sides of a front. Y d. All of the above 1273: Deviation changes with a change in __________.
N a. latitude Y b. heading N c. longitude N d. sea conditions 1456: The fog produced by warm moist air passing over a cold surface is called __________.
N a. conduction fog N b. radiation fog N c. frontal fog Y d. advection fog 1475: Which type of cloud is the classic "thunderhead"?
Y a. Cumulonimbus N b. Stratus N c. Cirrus N d. Altostratus 1497: When drawing a weather map and an isobar crosses a front, the isobar is drawn __________.
N a. perpendicular to the front Y b. kinked and pointing away from the low N c. kinked and pointing towards the low N d. kinked and pointing towards the high for a warm front only 1533: Lighted information markers show __________.
Y a. white lights N b. green lights N c. yellow lights N d. red lights 1592: A white buoy marked with an orange rectangle indicates __________.
N a. an anchorage N b. a fish net area N c. mid-channel Y d. general information 1658: Fog forms when the air temperature is at or below __________.
N a. 32° F N b. the wet bulb temperature Y c. the dew point N d. the dry bulb temperature 1700: Generally speaking, you should expect to find low atmospheric pressure prevailing in the earth's __________.
Y a. equatorial area N b. polar regions N c. mid-latitudes N d. All of the above 1731: When your vessel is on or near the path of an approaching tropical storm the __________.
N a. wind direction remains steady N b. wind speed increases N c. barometer falls Y d. All of the above 1750: Clearance gauges at bridges indicate __________.
N a. the height of the tide N b. depth of water under the bridge N c. charted vertical clearance at mean low water Y d. distance from the water to low steel of the bridge 1790: A Doppler speed log indicates speed through the water __________.
N a. at all times N b. in the bottom return mode Y c. in the volume reverberation mode N d. only when there is no current 2006: What is the relative bearing of an object broad on the port beam?
N a. 315° N b. 300° Y c. 270° N d. 235° 2024: In the North Sea area, you sight a buoy with a quick light showing 3 flashes every 10 seconds. Which topmark in illustration D030NG would be fitted to this buoy under the IALA Buoyage Systems? (D030NG )
N a. A N b. B N c. C Y d. D 2113: Vessels regularly navigating rivers above Cairo, Illinois, shall at all times have on board a copy of __________.
Y a. U.S. Army Corps of Engineers Regulations (Blue Book) N b. Nautical Almanac for the year N c. Sailing Directions N d. Light List Vol. V 2134: The Moon and Sun are in line over your meridian. Tomorrow when the Sun is over your meridian, the Moon will be __________.
N a. over the meridian too Y b. about 12°East of the meridian N c. about 6°West of the meridian N d. about 11° west of the meridian 2161: Yesterday your chronometer read 03h 01m 56s at the 1500 GMT time tick. Today your chronometer read 03h 01m 58s at the 1500 GMT time tick. What is the chronometer error?
N a. 03h 01m 58s fast Y b. 01m 58s fast N c. +2s N d. -2s 2186: You have completed the magnetic compass adjustments on magnetic east and magnetic south. The vessel is now steady on magnetic west but the compass reads 266°. What action should be taken?
N a. Adjust the compass with the athwartships magnets until the compass reads 268°. N b. Adjust the compass with the fore-and-aft magnets until the compass reads 270°. N c. Adjust the compass with the quadrantal spheres until the compass reads 274°. Y d. Adjust the compass with the fore-and-aft magnets until the compass reads 268°. 2209: You have completed the magnetic compass adjustments on magnetic east and magnetic south. The vessel is now steady on magnetic west but the compass reads 266°. You should now adjust the compass until it reads __________.
Y a. 268° N b. 270° N c. 274° N d. Do not adjust the compass, just record the error. 2240: If you observe a buoy off station you should __________.
N a. fill out and mail CG Form 2692 to the nearest Coast Guard office N b. appear in person at the nearest Coast Guard office N c. notify Coast Guard Headquarters in Washington, DC Y d. immediately contact the nearest Coast Guard office by radiotelephone 2318: Miaplacidus is found in what constellation?
N a. Puppis N b. Hydrus N c. Centaurus Y d. Carina 2354: 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 blue ends of the magnets are to port you should raise the athwartships tray. N b. If the red ends of magnets are to port you should lower the athwartships tray. N c. If the red ends of the magnets are aft you should lower the fore-and-aft tray. Y d. If the blue ends of the magnets are forward you should raise the fore-and-aft tray. 2397: The letter D in illustration D006NG represents the __________.
N a. sensible horizon N b. celestial horizon N c. visible horizon Y d. geometrical horizon 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 2644: The sidereal day begins __________.
N a. when the sun is over the first point of Aries N b. when the first point of Aries is over 180° longitude Y c. when the first point of Aries is over the upper branch of the reference meridian N d. at 0000 on 1 January (Sidereal Date) 2652: The dividing meridian between zone descriptions -10 and -11 is __________.
N a. 135°30'E N b. 145°00'E N c. 150°00'E Y d. 157°30'E 2658: You must draw a plotting sheet covering latitudes 45°N to 49°N and longitudes 179°E to 178°W. If the distance between each degree of longitude is 5 3/4 inches, what is the distance between latitude 45°N and latitude 49°N?
N a. 33.1 inches N b. 33.3 inches Y c. 33.6 inches N d. 33.9 inches 2698: You must draw a plotting sheet covering latitudes 38°N to 41°N and longitudes 179°E to 178°W. If the distance between each degree of longitude is 4 inches, what is the distance between latitude 38°N and latitude 41°N?
N a. 15.00 inches Y b. 15.49 inches N c. 15.75 inches N d. 16.25 inches 2725: A position that is obtained by using two or more intersecting lines of position taken at nearly the same time, is a(n) __________.
N a. estimated position N b. dead-reckoning position N c. running fix Y d. fix 2843: A position obtained by applying ONLY your vessel's course and speed to a known position is a __________.
N a. fix N b. running fix Y c. dead-reckoning position N d. probable position 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 3023: You have steadied up on a range dead ahead in line with your keel. After a few minutes the range, still dead ahead, appears as shown. Which action do you take? (D047NG )
Y a. Alter heading to the left N b. Alter heading to the right N c. Increase speed N d. Maintain heading, keeping the range dead ahead 3035: A major advantage of the NAVTEX system when compared to other systems is that __________.
N a. the information can be received on an ordinary FM radio Y b. warnings are printed out for reading when convenient N c. broadcasts are at scheduled times N d. a low frequency band is used for long distance transmission 3130: When may the automatic identification system (AIS) be switched off?
N a. At anytime as long as it is properly logged. Y b. At the Master's professional judgment. N c. Only when the vessel is at anchor or in port. N d. Under no circumstance.