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.
91: A preferred-channel buoy will show a __________.
N a. white light whose characteristic is Morse (A) N b. group-occulting white light N c. composite group-flashing (2 + 1) white light Y d. composite group-flashing (2 + 1) red or green light 101: A lighted preferred-channel buoy may show a __________.
N a. fixed red light N b. Morse (A) white light Y c. composite group-flashing light N d. yellow light 148: When possible, a DR plot should always be started from where?
N a. Any position Y b. A known position N c. An assumed position N d. None of the above 174: The position labeled D is a(n) __________. (D051NG )
N a. fix N b. running fix N c. estimated position Y d. dead reckoning position 194: The horizon glass of a sextant is __________.
Y a. silvered on its half nearer the frame N b. mounted on the index arm N c. between the horizon and the shade glasses N d. All of the above 271: Your vessel is leaving New York harbor in dense fog. As the vessel slowly proceeds toward sea, you sight a green can buoy on the starboard bow. Which action should you take?
N a. Turn hard right to get back into the channel. N b. Pass the buoy close to, leaving it to your port. N c. Stop and fix your position. Y d. Stand on, leaving the buoy to your starboard. 280: Under the U.S. Aids to Navigation System, a lighted buoy with a spherical topmark marks __________.
N a. the port side of the channel Y b. safe water N c. a hazard to navigation N d. the position of underwater cables 366: If an observer in the Northern Hemisphere faces the surface wind, the center of low pressure is to his______________.
N a. left, slightly behind him Y b. right, slightly behind him N c. left, slightly in front of him N d. right, slightly in front of him 459: A buoy bears 178°T at 3000 yards (2700 meters). What is the course to make good to leave the buoy 100 yards (90 meters) to port?
N a. 174°T N b. 176°T N c. 178°T Y d. 180°T 479: You are enroute to assist vessel A. Vessel A is underway at 5 knots on course 063°T, and bears 136°T at 78 miles from you. What is the course to steer at 13 knots to intercept vessel A?
Y a. 114° N b. 158° N c. 295° N d. 340° 566: You are attempting to locate your position relative to a hurricane in the Northern Hemisphere. If the wind direction remains steady, but with diminishing velocity, you are most likely __________.
N a. in the right semicircle N b. in the left semicircle N c. on the storm track ahead of the center Y d. on the storm track behind the center 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 694: Your ARPA has two guard zones. What is the purpose of the inner guard zone?
N a. Alert the watch officer that a vessel is approaching the preset CPA limit Y b. Warn of small targets that are initially detected closer than the outer guard zone N c. Guard against target loss during critical maneuvering situations N d. Sound an alarm for targets first detected within the zone 736: A line on a weather chart connecting places which have the same barometric pressure is called an __________.
N a. isotherm N b. isallobar Y c. isobar N d. isotope 737: What describes an ebb current?
N a. Horizontal movement of the water away from the land following low tide N b. Horizontal movement of the water toward the land following low tide Y c. Horizontal movement of the water away from the land following high tide N d. Horizontal movement of the water toward the land following high tide 749: You are enroute to assist vessel A. Vessel A is underway at 4.5 knots on course 233°T, and bears 264°T at 68 miles from you. What is the course to steer at 13 knots to intercept vessel A?
N a. 249° Y b. 256° N c. 262° N d. 268° 761: Under the IALA Buoyage Systems, a safe water mark may NOT __________.
N a. be spherical N b. display a white light N c. be lettered Y d. show a quick flashing light 798: A HYDROLANT warning would normally be sent for all of the following EXCEPT __________.
Y a. extinguishment of Robbins Reef Light in New York City's Upper Bay N b. unexploded ordinance in ocean waters at a depth of 78 fathoms (143 meters) N c. the presence of a large unwieldy tow in congested offshore water N d. a report of an overdue ship 855: Which condition exists at the summer solstice in the Northern Hemisphere?
N a. The north polar regions are in continual darkness. N b. The Northern Hemisphere is having short days and long nights. Y c. The Southern Hemisphere is having winter. N d. The Sun shines equally on both hemispheres. 866: Anticyclones are usually characterized by __________.
Y a. dry, fair weather N b. high winds and cloudiness N c. gustiness and continuous precipitation N d. overcast skies 976: The atmosphere in the vicinity of a high pressure area is called a(n) __________.
Y a. anticyclone N b. cold front N c. occluded front N d. cyclone 999: You are preparing a weather report form, WS Form B-80. Three-quarters of the sky is covered with clouds, and the anemometer indicates that the apparent wind is from 226° relative at 17.7 knots. You are on course 020°T at 8 knots. How should you encode group Nddff? (D041NG )
N a. 80208 N b. 72218 N c. 72318 Y d. 62324 1019: You are preparing a weather report form, WS Form B-80. The dry bulb thermometer reads 30°F (-1°), and the wet bulb thermometer reads 28°F (-2°C). Using the Ships Code Card, how would you encode the air temperature groups in the report? (D041NG )
N a. 10011, 2003/ N b. 11300, 2124/ N c. 11011, 2124/ Y d. 11011, 2104/ 1089: You are enroute to assist vessel A. Vessel A is underway at 5.5 knots on course 033°T, and bears 248°T at 64 miles from you. What is the course to steer at 13 knots to intercept vessel A?
Y a. 262° N b. 269° N c. 276° N d. 281° 1104: Which condition(s) is(are) necessary for the formation of dew?
N a. Clear skies N b. Calm air N c. Earth's surface cooler than the dew point of the air Y d. All of the above 1247: What is the predicted velocity of the tidal current 2 miles west of Southwest Ledge for 2330 DST (ZD +4) on 7 September 1983?
Y a. 1.3 knots N b. 1.6 knots N c. 1.9 knots N d. 2.2 knots 1253: The horizontal angle between the magnetic meridian and the north-south line of the magnetic compass is __________.
Y a. deviation N b. variation N c. compass error N d. dip 1368: What area of the earth cannot be shown on a standard Mercator chart?
N a. Equator N b. Areas including both North and South latitudes Y c. North and South Poles N d. A narrow band along the central meridian. 1517: When determining compass error by an azimuth of Polaris, you enter the Nautical Almanac with the __________.
N a. GHA Aries Y b. LHA Aries N c. LHA Polaris N d. GHA Polaris 1545: The change in the length of day becomes greater as latitude increases because of the __________.
N a. inclination of the diurnal circle to the equator N b. decreasing distance between the terrestrial meridians Y c. increased obliquity of the celestial sphere N d. changing distance between the earth and the sun 1558: As a high pressure system approaches, the barometer reading __________.
N a. stays the same N b. falls Y c. rises N d. falls rapidly 1576: You are entering an east coast port and see a buoy with a yellow triangle painted on it. This indicates __________.
Y a. you are in the vicinity of the ICW N b. the buoy is a special mark N c. the buoy is off station N d. the buoy designates a sharp turn in the channel 1578: The LMT of sunrise on the standard meridian is 0552. Your longitude is 99°15'E. What is your ZT of sunrise?
N a. 0512 N b. 0529 N c. 0552 Y d. 0615 1613: Where would you find information concerning the duration of slack water?
N a. Tide Tables Y b. Tidal Current Tables N c. American Practical Navigator N d. Sailing Directions 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 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 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 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 1773: A "Norther" in the Gulf of Mexico is __________.
N a. a wind shift to the north accompanied by a drop in temperature N b. a forcible northerly wind of at least 20 knots N c. a strong northerly wind that generally occurs between November and March Y d. All of the above 1866: What term is used to describe a tank barge constructed with the structural framing inside the cargo tank and the side shell plating containing the cargo?
Y a. Single hull N b. Shell plated N c. Hopper type N d. Independent tank 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) 1964: The great circle on the celestial sphere that passes through the zenith and the north and south poles is the __________.
N a. hour circle N b. prime vertical Y c. principal vertical N d. ecliptic 2090: You are underway in an area where the charted depth is 8 fathoms. You compute the height of tide to be -4.0 feet. The draft of your vessel is 5.0 feet (1.52 meters). You determine the depth of the water beneath your keel to be __________.
Y a. 39 feet (11.9 meters) N b. 43 feet (13.1 meters) N c. 47 feet (14.3 meters) N d. 57 feet (17.4 meters) 2163: The letter C in illustration D006NG represents the __________.
N a. visible horizon N b. geoidal horizon Y c. celestial horizon N d. sensible horizon 2216: A vessel is heading magnetic northwest and its magnetic compass indicates a heading of 317°. What action should be taken to remove this error during compass adjustment?
N a. Move the quadrantal spheres out. Y b. Move the quadrantal spheres in. N c. If the spheres are in as far as possible replace them with smaller spheres. N d. If the spheres are out as far as possible replace them with smaller spheres. 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 2256: The constellation that contains Polaris is __________.
N a. Orion N b. Cassiopeia Y c. Ursa Minor N d. Corona Borealis 2256: The constellation that contains Polaris is __________.
N a. Orion N b. Cassiopeia Y c. Ursa Minor N d. Corona Borealis 2423: IN REGION A of the IALA Buoyage System, when entering from seaward, the starboard side of a channel would be marked by a __________.
N a. red conical buoy Y b. green conical buoy N c. red can buoy N d. green can buoy 2524: What is the equivalent of 2° 35' in time units?
Y a. 10 min. 20 sec. N b. 9 min. 10 sec. N c. 7 min. 06 sec. N d. 6 min. 43 sec. 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 2532: You must construct a Mercator plotting sheet on a piece of paper measuring 28" by 32". The area includes latitude 32°S to 39°S and longitude 005°E to 003°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?
Y a. 3.38 inches N b. 3.62 inches N c. 3.79 inches N d. 3.95 inches 2562: In the time diagram shown __________. (D005NG )
N a. the GHA of the Sun is approximately 330° Y b. your date is one day later than the date at Greenwich N c. the LHA of the Sun is approximately 120° N d. you are in west longitude 2570: A plane that cuts the Earth's surface and passes through the poles will always form __________.
N a. the equator N b. a loxodromic curve N c. a small circle Y d. a meridian 2600: A parallel of latitude other than the equator is a __________.
N a. great circle N b. loxodromic curve Y c. small circle N d. gnomonic curve 2707: You will find information about the duration of slack water in the __________.
Y a. Tidal Current Tables N b. Tide Tables N c. American Practical Navigator N d. Sailing Directions 2730: When attempting an upstream landing while pushing empty barges ahead in a hard onshore wind, the approach is best made __________.
Y a. with bow out, stern in N b. with bow in, stern out N c. parallel to the dock, as close in as possible N d. parallel to the dock, as far out as possible 2819: The time interval between successive wave crests is called __________.
Y a. wave period N b. wavelength N c. frequency N d. significant wave height 2970: The Light List shows a lighted aid to navigation on the left bank. This means that the light can be seen on the port side of a vessel __________.
N a. ascending the river Y b. descending the river N c. crossing the river N d. proceeding from seaward 3128: Which of the following statements is TRUE regarding automatic identification systems (AIS)?
N a. AIS may be used to make passing arrangements via ship-to-ship text messaging thus relieving a vessel operator from sounding whistle signals or making contact via radiotelephone. Y b. AIS may be used to make passing arrangements via ship-to-ship text messaging but a vessel operator is still required to sound whistle signals unless the arrangement is made via radiotelephone. N c. AIS cannot be used to make passing arrangements because the system does not have the ability to communicate from ship-to-ship in this manner. N d. AIS cannot be used to make passing arrangements because the use of the ship-to-ship text messaging feature in this way is prohibited.