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.
92: When utilizing a Pacific Coast chart, the reference plane of soundings is __________.
N a. mean low water springs N b. mean low water Y c. mean lower low water N d. lowest normal low water 208: The moon is full and at perigee on 20 January 1983. What is the maximum current you could expect at 2350 (ZD +5) at Nantucket Shoals?
N a. 0.5 knot N b. 0.7 knot N c. 0.8 knot Y d. 1.0 knot 238: The predicted time that the flood begins at the entrance to Delaware Bay is 1526. You are anchored off Chestnut St. in Philadelphia. If you get underway bound for sea at 1430 and turn for 11 knots, at what point will you lose the ebb current?
N a. New Castle Y b. Liston Pt. N c. Arnold Pt. N d. Ship John Shoal Lt. 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° 362: Which statement about a simple conic chart projection is TRUE?
N a. It is an equal-area projection. N b. It is a conformal projection. N c. Meridians appear as curved lines. Y d. The scale is correct along any meridian. 363: Your dead reckoning position should be plotted __________.
N a. whenever an estimated position is plotted N b. when it agrees with your loran position N c. when coming on or going off soundings Y d. at least every hour on the hour in the open waters of the sea 432: When using a Lambert conformal chart in high latitudes, angles such as bearings are measured in reference to __________.
N a. the meridian through the object of the bearing Y b. the meridian through the ship's position N c. the meridian midway between the ship and the object N d. any meridian 450: You are enroute to Jacksonville, FL, from San Juan, P.R. There is a fresh N'ly wind blowing. As you cross the axis of the Gulf Stream you would expect to encounter __________.
N a. cirrus clouds N b. smoother seas and warmer water Y c. steeper waves, closer together N d. long swells 464: Prior to reading an aneroid barometer, you should tap the face lightly with your finger to __________.
N a. expose any loose connections N b. demagnetize the metal elements Y c. bring the pointer to its true position N d. contract and expand the glass face 529: In some river mouths and estuaries the incoming high-tide wave crest overtakes the preceding low-tide trough. This results in a wall of water proceeding upstream, and is called a __________.
N a. seiche Y b. bore N c. boundary wave N d. surge 551: Spoil grounds, anchorage areas, cable areas, and military exercise areas are all marked by yellow buoys. Which special mark on the buoy will indicate the specific area you are in?
N a. A topmark triangular in shape N b. A topmark spherical in shape Y c. Lettering on the buoy N d. A topmark consisting of two cones with the points up 605: Which is NOT a side of the celestial navigational triangle?
N a. Co-latitude N b. Zenith distance Y c. Altitude N d. Co-declination 613: Your radar indicates a target; however, there is no visible object at the point indicated. A large mountain, approximately 50 miles away on the same bearing as the target, is breaking the horizon. You should suspect the radar target is caused by __________.
N a. a submerged submarine Y b. ducting N c. sub-refraction N d. ionospheric skip waves 646: You have determined that you are in the right semicircle of a tropical cyclone in the Northern Hemisphere. What action should you take to avoid the storm?
N a. Place the wind on the starboard quarter and hold that course. N b. Place the wind on the port quarter and hold that course. N c. Place the wind on the port bow and hold that course. Y d. Place the wind on the starboard bow and hold that course. 649: You are on course 226°T. In order to check the latitude of your vessel, you should observe a celestial body on which bearing?
N a. 226° N b. 270° Y c. 000° N d. 026° 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 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 919: You are plotting a running fix in an area where there is a determinable current. How should this current be treated in determining the position?
N a. The drift should be added to the ship's speed. Y b. The course and speed made good should be determined and used to advance the LOP. N c. The current should be ignored. N d. The set should be applied to the second bearing. 1011: You are underway in the North Sea on course 127°T. You sight a buoy with the topmarks shown bearing two points on the starboard bow. Which action must be taken? (D025NG )
N a. Alter course to starboard until the buoy is at least two points on the port bow, then hold course. N b. Alter course to port until the buoy is broad on the starboard quarter, then hold course. N c. Change course to have the buoy close aboard either side. Y d. Ensure the bearings change to the right. 1058: You are preparing a weather report form, WS Form B-80. Your position is LAT 64°42'N, LONG 02°28'W. How would this be encoded? (D041NG )
N a. 90647, 90024 N b. 0647N, 00025 Y c. 99647, 70025 N d. 9064N, 9025W 1061: In waters where the cardinal system is used you would expect to find danger __________.
N a. lying to the south of an eastern quadrant buoy Y b. lying to the south of a northern quadrant buoy N c. lying to the east of an eastern quadrant buoy N d. beneath or directly adjacent to the buoy 1162: A line connecting all possible positions of your vessel at any given time is a __________.
N a. longitude line N b. latitude line Y c. line of position N d. fix 1194: In the Northern Hemisphere, an observer at point II in the weather system should experience a wind shift from the __________. (D014NG )
Y a. southwest, clockwise to northwest N b. northeast, clockwise to west-southwest N c. northeast, counterclockwise to northwest N d. east, counterclockwise to south-southwest 1310: An urgent marine storm warning message would be broadcast on __________.
N a. 2670 KHz N b. 156.80 MHz (VHF-FM Ch. 16) Y c. 157.10 MHz (VHF-FM Ch. 22A) N d. None of the above 1330: You are located within a stationary high pressure area. Your aneroid barometer is falling very slowly. This indicates a(n) __________.
N a. wind shift of 180° N b. large increase in wind velocity Y c. decrease in the pressure of the system N d. increase in the intensity of the system 1390: The fog most commonly encountered at sea is called __________.
N a. conduction fog N b. radiation fog N c. frontal fog Y d. advection fog 1509: Your facsimile prognostic chart indicates that you will cross the cold front of a low pressure system in about 24 hours. You should __________.
N a. expect to see cirrus clouds followed by altostratus and nimbostratus clouds N b. alter course to remain in the navigable semicircle Y c. prepare for gusty winds, thunderstorms, and a sudden wind shift N d. expect clear weather, with steady winds and pressure, until the front passes 1570: The navigational triangle uses parts of two systems of coordinates, one of which is the horizon system and the other is the __________.
N a. terrestrial system N b. astronautical system Y c. celestial equator system N d. ecliptic system 1618: The Light List indicates that a light has a nominal range of 14 miles and is 26 feet high. If the visibility is 4 miles and your height of eye is 20 feet, at what approximate distance will you sight the light?
Y a. 7.5 miles N b. 9.6 miles N c. 11.2 miles N d. 14.0 miles 1647: Cumulonimbus clouds are formed by __________.
Y a. vertical air movements N b. heavy rainstorms N c. horizontal air movements N d. any movement of moist air 1728: If a hurricane several hundred miles away is moving in your general direction your barometer would __________.
N a. start to rise rapidly Y b. start to fall gradually N c. rise slowly, begin "pumping" and then start a slow, steady fall N d. remain steady 1741: The left half of the storm is called the navigable semicircle because __________.
N a. the wind speed is decreased by the storm's forward motion N b. the wind tends to blow vessels away from the storms track Y c. Both A and B N d. Neither A nor B 1793: Which weather element cannot be measured accurately while on board a moving vessel?
N a. relative humidity N b. temperature Y c. true wind speed N d. atmospheric pressure 1815: Which weather system produces strong cold winds called "Northers" during the winter months in the Gulf of Mexico?
Y a. An anticyclone N b. A polar maritime air mass N c. A cyclone N d. A low pressure system 1840: A vessel heading NW is on a course of __________.
N a. 274.5° N b. 292.5° Y c. 315.0° N d. 337.5° 1875: The position labeled "E" was plotted because __________. (D051NG )
N a. a dead reckoning position is plotted within a half-hour of each course change N b. the position is a running fix Y c. a dead reckoning position is plotted for each speed change N d. the vessel's position was fixed at 1145 1992: The parallel of latitude at 23°27'S is the __________.
N a. Tropic of Cancer Y b. Tropic of Capricorn N c. Arctic Circle N d. ecliptic 2079: Permission to enter the riverward chamber of twin locks is given by the lockmaster and consists of which sound signal?
N a. One short blast N b. Two short blasts N c. One long blast Y d. Two long blasts 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 2271: What is the definition of height of tide?
N a. The vertical distance from the surface of the water to the ocean floor Y b. The vertical distance from the tidal datum to the level of the water at any time N c. The vertical difference between a datum plane and the ocean bottom N d. The vertical difference between the heights of low and high water 2279: Antares is found in what constellation?
Y a. Scorpio N b. Corvus N c. Libra N d. Corona Borealis 2294: What celestial body may sometimes be observed in daylight?
N a. New Moon N b. Saturn N c. Sirius Y d. Venus 2370: In the United States, short-range radio navigational warnings are broadcast by the __________.
Y a. Coast Guard N b. Corps of Engineers N c. NOAA N d. harbor master of the nearest port 2389: The autumnal equinox is the point where the Sun is at __________.
N a. maximum declination north N b. maximum declination south N c. 0° declination going to northerly declinations Y d. 0° declination going to southerly declinations 2492: A star that suddenly becomes several magnitudes brighter and then gradually fades is a __________.
N a. double star N b. variable star Y c. nova N d. nebula 2589: Under the IALA cardinal system, a mark with a quick white light showing 6 flashes followed by one long flash indicates that the safest water is on the __________.
N a. north side of the mark N b. west side of the mark N c. east side of the mark Y d. south side of the mark 2695: You are plotting a running fix in an area where there is a determinable current. How should this current be treated in determining the position?
N a. The drift should be added to the ship's speed. N b. The current should be ignored. Y c. The course and speed made good should be determined and used to advance the LOP. N d. The set should be applied to the second bearing. 2777: A sailing chart could have a scale of __________.
N a. not more than 1:25,000 N b. 1:35,000 N c. 1:100,000 Y d. 1:700,000 2782: Your radar is set on a true motion display. Which of the following will appear to move across the PPI scope.
Y a. Own ship's marker N b. Echo from a ship at anchor N c. Echoes from land masses N d. All of the above 2792: You take a bearing of 142° and 259° of two objects. Which bearing of a third object will give the best fix?
N a. 081° N b. 238° Y c. 201° N d. 234° 2822: While navigating in fog off a coastline of steep cliffs, you hear the echo of the ships fog horn 2 seconds after the signal was sounded. What is the distance to the shore?
Y a. 360 yards N b. 320 yards N c. 280 yards N d. 140 yards 2849: You take a bearing of 086° of a lighthouse. What bearing of another object would give the best fix?
Y a. 000° N b. 066° N c. 112° N d. 271° 2904: Your radar displays your ship off center. As you proceed on your course, your ship's marker moves on the PPI scope while echoes from land masses remain stationary. What is this display called?
N a. Off center Y b. True motion N c. Stabilized N d. Head up 2926: You are inbound in a channel marked by a range. The range line is 309°T. You are steering 306°T and have the range in sight as shown. The range continues to open. Which action should you take? (D047NG )
Y a. Come left until the range closes then steer to the left of 306°T. N b. Alter course to the right to 309°T or more to bring the range in line. N c. Continue on course but be prepared to come right if the range continues to open. N d. Alter course to the left to close the range, then alter course to 309°T. 2949: On 13 November 1981 you observe a back sight of the upper limb of the Sun. The sextant altitude (hs) is 109°26.3'. The height of eye is 66 feet, and the index error is 2.0' on the arc. What is the observed altitude (HO)?
N a. 70°56.6' N b. 70°38.0' Y c. 70°27.2' N d. 70°23.2' 3016: The radar control that shortens all echoes on the display and reduces clutter caused by rain or snow is the __________.
N a. sensitivity time control (sea clutter control) N b. receiver gain control N c. brilliance control Y d. fast time constant (differentiator) 3017: A rotary current sets through all directions of the compass. The time it takes to complete one of these cycles, in a locale off the East coast of the US, is approximately __________.
N a. 3 hours N b. 6 1/4 hours Y c. 12 1/2 hours N d. 18 3/4 hours 3052: The Sailing Directions contain information on __________.
N a. required navigation lights N b. lifesaving equipment standards N c. casualty reporting procedures Y d. currents in various locations 3095: ECDIS must have the capability to preserve the record of the track for the previous __________.
N a. 6 hours Y b. 12 hours N c. 18 hours N d. 24 hours 3101: The typical operating range of automatic identification systems (AIS) at sea is nominally __________.
N a. 2 nm N b. 8 nm Y c. 20 nm N d. 40 nm