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.
12: Lines on a chart which connect points of equal magnetic variation are called __________.
N a. magnetic latitudes N b. magnetic declinations N c. dip Y d. isogonic lines 100: You are underway on course 050°T and your maximum speed is 12 knots. The eye of a hurricane bears 080°T, 100 miles from your position. The hurricane is moving towards 265°T at 22 knots. What course should you steer at 12 knots to have the maximum CPA?
N a. 219° Y b. 208° N c. 199° N d. 190° 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 217: In some parts of the world there is often a slight fall in tide during the middle of the high water period. The effect is to create a longer period of stand at higher water. This special feature is called a(n) __________.
N a. apogean tide Y b. double high water N c. perigean tide N d. bore 275: Which statement concerning illustration is correct? (Soundings and heights are in meters) (D010NG )
Y a. The sunken wreck southwest of Beito Island shows the hull or superstructure above the sounding datum. N b. There is a 12-meter deep hole inside the 5-meter curve just west of Beito Island. N c. The position of the lightship is indicated by the center of the star on the symbol's mast. N d. Maury Lightship swings about her anchor on a circle with a 21-meter diameter. 317: The time meridian used for tide computations in New York Harbor is __________.
N a. 52°30'W N b. 60°00'W Y c. 75°00'W N d. 82°30'W 341: Buoys which only mark the left or right side of the channel will never exhibit a light with which characteristic?
N a. Flashing N b. Quick flashing Y c. Composite group flashing N d. Equal interval (isophase) 342: A polyconic projection is based on a __________.
N a. plane tangent at one point N b. cylinder tangent at one parallel N c. cone tangent at one parallel Y d. series of cones tangent at selected parallels 345: A navigator fixing a vessel's position by radar __________.
N a. should never use radar bearings N b. should only use radar bearings when the range exceeds the distance to the horizon Y c. can use radar information from one object to fix the position N d. must use information from targets forward of the beam 417: On 6 July 1983, at 1830 DST (ZD +4), what will be the predicted height of tide at Newburgh, NY?
N a. 3.3 feet N b. 2.6 feet N c. 2.4 feet Y d. 2.0 feet 430: The southeast trade winds actually blow toward the __________.
N a. southeast N b. south N c. east Y d. northwest 441: A yellow buoy may exhibit a(n) __________.
N a. fixed red light Y b. flashing light N c. white light N d. occulting light 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 521: Which sextant has an index error of 2'10" on the arc? (D050NG )
N a. A N b. B N c. C Y d. D 614: A marine chronometer should be rewound once every __________.
N a. 12 hours Y b. day N c. 3 days N d. week 764: Magnetic variation changes with a change in __________.
N a. the vessel's heading N b. sea conditions N c. seasons Y d. the vessel's position 775: A sidereal day is shorter than a solar day. This difference is due to __________.
N a. irregularities in the daily rotational rate of the Sun N b. the space motion of the solar system N c. the precession of the equinoxes Y d. the use of different reference points 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 889: 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 47 feet (14.3 meters) and the visibility is 1.5 miles. At what approximate range will you first sight the light?
N a. 1.5 miles Y b. 2.0 miles N c. 6.0 miles N d. 12.7 miles 900: An orange and white buoy with a rectangle on it is a(n) __________.
Y a. informational buoy N b. junction buoy N c. safe water buoy N d. All of the above 974: Which cloud commonly produces a halo about the Sun or Moon?
Y a. Cirrostratus N b. Cirrocumulus N c. Altostratus N d. Altocumulus 1102: What is the approximate geographic range of Race Rock Light, NY, if your height of eye is 27 feet (8.2 meters)? Refer to "Reprints from the LIGHT LISTS AND COAST PILOTS" .
N a. 9.9 nm N b. 14.3 nm Y c. 15.7 nm N d. 17.4 nm 1158: What type of cloud is indicated by the number 5 in illustration D039NG? (D039NG )
N a. Cirrostratus N b. Cirrocumulus Y c. Altocumulus N d. Nimbostratus 1161: What is characteristic of an occulting light?
N a. 1 sec. flash, 2 sec. eclipse, 1 sec. flash, 5 sec. eclipse N b. 5 sec. flash, 5 sec. eclipse Y c. 4 sec. flash, 2 sec. eclipse, 3 sec. flash, 2 sec. eclipse N d. 6 sec. flash, 6 sec. eclipse 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 1192: You are enroute to assist vessel A. Vessel A is underway at 5.5 knots on course 033°T, and bears 284°T at 43 miles from you. What is the course to steer at 16 knots to intercept vessel A?
N a. 284° Y b. 303° N c. 329° N d. 342° 1203: If the compass heading and the magnetic heading are the same then __________.
N a. the deviation has been offset by the variation N b. there is something wrong with the compass N c. the compass is being influenced by nearby metals Y d. there is no deviation on that heading 1273: Deviation changes with a change in __________.
N a. latitude Y b. heading N c. longitude N d. sea conditions 1314: The Illustration shows the symbols used on radio facsimile weather charts. Which of these symbols indicates hail? (D042NG )
N a. N Y b. H N c. Q N d. F 1319: The Sailing Directions (Planning Guide) contain information on all of the following EXCEPT __________.
Y a. coastal features N b. ocean basin environment N c. ocean routes N d. military operating areas 1323: The magnetic compass error which changes with the geographical location of your vessel is called __________.
N a. deviation Y b. variation N c. compensation N d. differentiation 1443: At the master gyrocompass, the compass card is attached to the __________.
N a. spider element Y b. sensitive element N c. link arm N d. pickup transformer 1473: Which statement about gyrocompass error is TRUE?
Y a. The amount of the error and the sign will generally be the same on all headings. N b. The sign (E or W) of the error will change with different headings of the ship. N c. Any error will remain constant unless the compass is stopped and restarted. N d. Any error shown by a gyro repeater will be the same as the error of the master compass. 1533: Lighted information markers show __________.
Y a. white lights N b. green lights N c. yellow lights N d. red lights 1624: A psychrometer has two thermometers that provide dry bulb and wet bulb temperatures. By comparing these two temperature readings with a set of tables you can determine the __________.
N a. atmospheric pressure N b. wind speed Y c. relative humidity and dew point N d. wind chill factor 1632: Lighted white and orange buoys must show which color light?
N a. Orange N b. Red Y c. White N d. Alternating yellow and white 1694: In the Southern Hemisphere the wind circulation in a high pressure system rotates __________.
N a. clockwise and inward N b. clockwise and outward Y c. counterclockwise and outward N d. counterclockwise and inward 1743: In the Northern Hemisphere, if your vessel is in a hurricane's navigable semicircle it should be positioned with the wind on the __________.
Y a. starboard quarter, hold course and make as much speed as possible N b. port bow, hold course and make as much speed as possible until the hurricane has passed N c. port quarter, maintain course and make as much speed as possible N d. starboard bow and heave to until the hurricane has passed 1774: Restricted areas at locks and dams are indicated by __________.
N a. flashing red lights upstream and fixed red lights downstream N b. yellow unlighted buoys Y c. signs and/or flashing red lights N d. red daymarks upstream and green daymarks downstream 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 1883: Pressure gradient is a measure of __________.
N a. a high-pressure area Y b. pressure difference over horizontal distance N c. pressure difference over time N d. vertical pressure variation 1902: Under the numbering system used by NGA (NIMA), a four digit number is used for __________.
N a. large scale charts of infrequently navigated areas such as the polar regions N b. charts of rivers or canal systems such as the Ohio River or Erie Canal Y c. non-navigational materials, such as a chart correction template or maneuvering board N d. foreign charts reproduced by NGA (NIMA) 1956: In the North Sea area, you sight a buoy showing a quick white light with 6 flashes, followed by one long flash at 15 second intervals. Which of the four topmarks shown would be fitted to this buoy? (D030NG )
Y a. A N b. B N c. C N d. D 2002: What term is used to describe a river barge designed to carry coal or any similar cargo not requiring weather protection?
N a. Single skin N b. Double skin Y c. Open hopper N d. Deck barge 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° 2070: What is the relative bearing of an object on the port beam?
N a. 045° N b. 090° N c. 180° Y d. 270° 2103: The description "Racon" beside an illustration on a chart would mean a __________.
N a. radar calibration beacon N b. circular radio beacon N c. radar conspicuous beacon Y d. radar transponder beacon 2181: 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?
Y a. One red light N b. Two red lights N c. Three red lights N d. No lights 2226: Upper limb observations of the Moon are used more frequently than those of the Sun because of the location of the Moon in the sky and the __________.
N a. lesser distance between the Earth and the Moon Y b. phase of the Moon N c. rapid change in declination of the Moon N d. effects of augmentation and horizontal parallax 2309: The plane of the ecliptic is inclined to the plane of the celestial equator by what angle?
N a. 00°23' Y b. 23°27' N c. 45°00' N d. 90°00' 2344: The Moon is subject to four types of libration. Which of the following is NOT one of these types of libration?
N a. Libration in latitude N b. Diurnal libration N c. Physical libration Y d. Horizontal libration 2381: The difference between the heights of low and high tide is the __________.
N a. period N b. distance N c. depth Y d. range 2430: You are on course 222°T and take a relative bearing of a lighthouse of 025°. What is the true bearing to the lighthouse?
N a. 197° Y b. 247° N c. 315° N d. 335° 2650: In the celestial equator system of coordinates what is equivalent to the colatitude of the Earth system of coordinates?
N a. Coaltitude N b. Zenith distance Y c. Polar distance N d. Declination 2706: The following types of vessels are awaiting lockage on the upper Mississippi. Which type of vessel is normally passed through the lock first?
N a. Pleasure craft N b. Commercial towboats Y c. Commercial passenger vessels N d. Commercial fishing vessels 2844: The signal from a ramark will show on the PPI as a __________.
N a. coded signal on the same bearing and at a greater range then the transponder N b. circle surrounding the transponder Y c. radial line from the transponder to the center of the PPI N d. dashed circle at the same range as the transponder 2984: What two shapes shown are used to indicate a preferred channel? (D045NG )
N a. A and B N b. B and C N c. C and D Y d. A and D 3024: Given are the courses and speeds of 4 vessels. The navigator of which vessel would be required to know the actual time of meridian transit in order to take an accurate observation at LAN ?
N a. C 018°T, Sp 6 knots N b. C 079°T, Sp 24 knots N c. C 101°T, Sp 7 knots Y d. C 349°T, Sp 25 knots 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 3109: While underway, a vessel over 100,000 gross tons with an automatic identification systems (AIS) is expected to broadcast all of the following information every 1 to 10 seconds EXCEPT __________.
N a. rate of turn Y b. name of vessel N c. navigational status N d. ship's heading