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.
18: A vessel's position should be plotted using bearings of __________.
N a. buoys close at hand Y b. fixed known objects on shore N c. buoys at a distance N d. All of the above 45: The navigator aboard a ship at approximately 165°E longitude observes the Sun at ZT 14-25-04 on 21 September. What is the GMT and Greenwich date of the observation?
Y a. 03-25-04, 21 September N b. 02-25-04, 21 September N c. 01-25-04, 21 September N d. 01-25-04, 20 September 49: While steering a course of 150°T, you wish to observe a body for a latitude check. What would the azimuth have to be?
Y a. 000°T N b. 090°T N c. 150°T N d. 240°T 75: The zone time of LAN is 1152. Your longitude is 73°15'E. What time would you use to enter the Nautical Almanac to determine the declination of the Sun at LAN?
Y a. 0659 N b. 0652 N c. 1859 N d. 1852 113: The type of transmission used in Loran-C is a __________.
N a. single pulse N b. wide pulse Y c. multipulse N d. narrow pulse 138: The path that a vessel is expected to follow, represented on a chart by a line drawn from the point of departure to the point of arrival, is the __________.
N a. DR plot Y b. track line N c. heading N d. estimated course 232: Which statement concerning the chartlet is TRUE? (Soundings and heights are in meters) (D010NG )
N a. Maury lightship is visible for 17 miles. N b. The bottom to the south-southeast of the lightship is soft coral. N c. There is a 12-meter deep west of Beito Island and inside the 5-meter line. Y d. There is a dangerous eddy southeast of Beito Island. 310: Which sextant shown has an index error of 3'30" off the arc? (D050NG )
N a. A Y b. B N c. C N d. D 404: An aneroid barometer is an instrument __________.
N a. used to measure the speed of wind Y b. in which the pressure of the air is measured N c. that tells which direction a storm is coming from N d. used to measure the height of waves 410: The height of the tide at low water is 0.0 feet. The range is 9.0 feet. The duration is 06h 00m. The height of the tide 02h 12m before high water will be __________.
N a. 8.3 feet Y b. 6.3 feet N c. 4.7 feet N d. 2.7 feet 456: Which condition exists in the eye of a hurricane?
N a. Wind rapidly changing direction N b. A temperature much lower than that outside the eye N c. Towering cumulonimbus clouds Y d. An extremely low barometric pressure 520: On charts of U.S. waters, a magenta marking is NOT used for marking a __________.
Y a. 5-fathom curve N b. prohibited area N c. lighted buoy N d. radio beacon 554: A sling psychrometer is a(n) __________.
N a. type of cargo gear N b. instrument used in celestial navigation Y c. instrument used to measure relative humidity N d. instrument used to measure specific gravity 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° 651: Which topmark shown identifies an isolated danger? (D023NG )
N a. A Y b. B N c. C N d. D 723: If there is any doubt as to the proper operation of a radar, which statement is TRUE?
N a. Only a radar expert can determine if the radar is operating. N b. All radars have indicator lights and alarms to signal improper operation. Y c. A radar range compared to the actual range of a known object can be used to check the operation of the radar. N d. The radar resolution detector must be energized to check the radar. 734: You are approaching Chatham Strait from the south in foggy weather. You have Coronation Island and Hazy Islands on the radar. Suddenly the radar malfunctions. You then resort to using whistle echoes to determine your distance off Coronation Island. Your stopwatch reads 16.3 seconds for the echo to be heard. How far are you off Coronation Island?
N a. 1.0 mile Y b. 1.5 miles N c. 2.0 miles N d. 2.5 miles 767: What describes a flood current?
N a. Horizontal movement of the water toward the land after high tide Y b. Horizontal movement of the water toward the land after low tide N c. Horizontal movement of the water away from the land following high tide N d. Horizontal movement of the water away from the land following low tide 784: Variation is the angular measurement between __________.
N a. compass north and magnetic north N b. compass north and true north Y c. magnetic meridian and the geographic meridian N d. your vessel's heading and the magnetic meridian 852: What is published by the U.S. Coast Guard?
Y a. Light List N b. Nautical Charts N c. Tide Tables N d. U.S. Coast Pilot 862: The U.S. Coast Guard publishes __________.
Y a. Light Lists N b. U.S. Coast Pilots N c. Radio Navigational Aids N d. All of the above 928: The position labeled "D" was plotted because __________. (D051NG )
Y a. a dead reckoning position is plotted for each course change N b. a dead reckoning position is plotted within 30 minutes of a running fix N c. the vessel's speed changed at 1125 N d. All of the above 995: What is the equivalent of 83°29.6' in time units?
N a. 5h 47m 34.8s N b. 5h 18m 22.7s N c. 5h 01m 42.3s Y d. 5h 33m 58.4s 1151: Buoys are marked with reflective material to assist in their detection by searchlight. Which statement is TRUE?
N a. A safe-water buoy will display red and white vertical stripes of reflective material. N b. All reflective material is white because it is the most visible at night. N c. A special-purpose mark will display either red or green reflective material to agree with its shape. Y d. A preferred-channel buoy displays either red or green reflective material to agree with the top band of color. 1178: The range of tide is the __________.
N a. distance the tide moves out from the shore Y b. difference between the heights of high and low tide N c. duration of time between the high and low tide N d. maximum depth of the water at high tide 1250: Daylight savings time is a form of zone time that adopts the time __________.
Y a. one zone to the east N b. one zone to the west N c. two zones to the east N d. two zones to the west 1288: Your vessel will be docking at Chester, PA, during the evening of 22 April 1983. The chart shows a depth of 20 feet (6.1 meters) at the pier. What will be the depth of water available at 2310 EST (ZD +5)?
N a. 19.2 feet (5.9 meters) N b. 20.8 feet (6.3 meters) Y c. 24.7 feet (7.5 meters) N d. 25.8 feet (7.9 meters). 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 1337: What will be the time of maximum flood current at Sagamore Bridge on the Cape Cod Canal during the morning of 6 December 1983 (ZD +5)?
Y a. 0708 N b. 0712 N c. 0716 N d. 1020 1380: Which type of weather could you expect soon after seeing "hook" or "comma" shaped cirrus clouds?
Y a. Rain with the approach of a warm front N b. Clearing with the approach of a cold front N c. Continuing fog and rain N d. The formation of a tropical depression 1417: Determine the first time after 1200 EST (ZD +5) when the velocity of the current will be 0.5 knot on 18 November 1983, at Marcus Hook, PA.
N a. 1221 N b. 1226 Y c. 1239 N d. 1312 1454: Atmospheric pressure may be measured with a(n) __________.
N a. barograph N b. aneroid barometer N c. mercurial barometer Y d. All of the above 1522: The pressure-sensitive element of an aneroid barometer is called a __________.
N a. pressure bellows Y b. sylphon cell N c. column of mercury N d. constant pressure capsule 1532: The position labeled "E" was plotted because __________. (D051NG )
Y a. a dead reckoning position is plotted for each speed change N b. a dead reckoning position is plotted within a half-hour of each course change N c. the position is a running fix N d. the vessel's position was fixed at 1145 1712: Tornados are often associated with __________.
N a. winds in the warm sector ahead of a cold front and travel from southwest towards the east or northeast N b. squall lines and very heavy thunderstorm activity N c. winds that may be in excess of 200 knots and destructive funnel clouds Y d. All of the above 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 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 1786: You are downbound approaching a lock and see 3 green lights in a vertical line. This indicates __________.
N a. that the lock chamber is open and ready to receive your tow N b. that you should hold up until the signal changes to 2 green lights Y c. the upstream end of the river wall N d. the upstream end of the land wall 1822: What is the relative bearing of an object broad on the port bow?
Y a. 315° N b. 330° N c. 345° N d. 360° 1909: In the horizon system of coordinates what is equivalent to the equator on the Earth?
N a. Prime vertical circle N b. Principal vertical circle N c. Parallels of altitude Y d. Horizon 1926: The prime vertical is the great circle on the celestial sphere that passes through the __________.
N a. celestial poles and the zenith Y b. zenith, nadir and the east point of the horizon N c. celestial poles and the celestial body N d. zenith, nadir and celestial body 1982: In the horizon system of coordinates what is equivalent to the Greenwich hour angle of the celestial equator system?
N a. Zenith distance N b. Coaltitude N c. Altitude Y d. Azimuth 1986: The Moon is farthest from the Earth at __________.
N a. the full Moon Y b. apogee N c. the lunar solstice N d. quadrature 1989: In the horizon system of coordinates what is the equivalent to the meridians on the Earth?
N a. Horizon N b. Hour circle Y c. Vertical circles N d. Celestial meridians 2098: Which magnetic compass corrector(s) can be set while the vessel is on a heading of magnetic east or magnetic west?
N a. Quadrantal spheres N b. Heeling magnets Y c. Fore-and-aft magnets N d. Athwartships magnets 2124: You must draw a plotting sheet covering latitudes 45°N to 49°N and longitudes 179°E to 178°W. If the distance between latitude 45°N to 49°N is 20 inches, what is the distance between the meridians of 1° of longitude?
N a. 2.9 inches N b. 3.2 inches Y c. 3.4 inches N d. 3.7 inches 2159: Induced magnetism is found in __________.
N a. hard iron Y b. soft iron N c. vertical iron only N d. horizontal iron only 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. 2452: The permanent magnetism of a vessel may change in strength due to __________.
N a. the nature of the cargo being carried N b. changes in heading Y c. major structural repair N d. All of the above 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 2588: You are approaching an open drawbridge and sound the proper signal. You receive no acknowledgment from the bridge. Which action should you take?
Y a. Approach with caution and proceed through the open draw. N b. Approach under full control to a position no closer than 400 yards from the bridge and await a signal from the bridge. N c. Hold in the channel as a vessel is closing the bridge from the other direction. N d. Resound the opening signal and do not pass through the bridge until signals have been exchanged. 2616: What is the equivalent of 4 min. 04 sec. in arc units?
N a. 60°16' N b. 8°08' N c. 2°08' Y d. 1°01' 2702: You must draw a plotting sheet covering latitudes 46°N to 48°N and longitudes 179°E to 178°W. If the distance between each degree of longitude is 2 7/8 inches, what is the distance between latitude 46°N and 48°N?
Y a. 8.4 inches N b. 8.1 inches N c. 7.9 inches N d. 7.7 inches 2709: Under the IALA-B Buoyage System, when entering from seaward a lateral system buoy to be left to port may display which of the topmarks shown? (D046NG )
N a. A N b. B N c. C Y d. D 2860: On the Mississippi and Ohio Rivers, there is a special type of fog known as steam fog. It is caused by __________.
N a. warm air passing over much colder water Y b. cold air passing over much warmer water N c. a rapid cooling of the ground on a clear night N d. rain coming out of a warm air mass aloft 2878: 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 356°T, Sp 5 knots N b. C 099°T, Sp 17 knots Y c. C 192°T, Sp 23 knots N d. C 278°T, Sp 6 knots 2892: The Light List indicates that a dayboard is a type NB. You should __________.
N a. see a black triangle N b. look for another daymark forming a range Y c. expect a daymark of no lateral significance N d. check to enter the correct channel at the junction daymark 2968: Some locations maintain a zone time of -13. What are the zone time and date if the Greenwich time and date are 0152, 10 January?
N a. 0052, 9 January N b. 0258, 9 January Y c. 1452, 10 January N d. 0052, 11 January 3022: A green-and-red banded daymark, green band uppermost, will have the shape shown at letter __________. (D045NG )
Y a. A N b. B N c. C N d. D 3127: Which of the following statements is TRUE regarding automatic identification systems (AIS) ?
N a. AIS cannot be used to make passing arrangements because the system is not capable of this type of ship-to-ship communications. N b. AIS cannot be used to make passing arrangements because the ship-to-ship text messaging feature is for emergency use only. Y c. AIS can be used to make passing arrangements via ship-to-ship text messaging but a vessel operator is not relieved from the requirement to sound whistle signals or make arrangements via bridge-to-bridge radiotelephone. N d. AIS can be used to make passing arrangements via ship-to-ship text massaging thus relieving a vessel operator from making such arrangements via bridge-to-bridge radiotelephone or signaling intent to pass via whistle signals.