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.
26: Wind direction may be determined by observing all of the following EXCEPT __________.
N a. low clouds N b. waves N c. whitecaps Y d. swells 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 110: A millibar is a unit of __________.
N a. humidity N b. precipitation Y c. pressure N d. temperature 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 184: When the index and horizon mirrors of a properly adjusted sextant are at an angle of 45° to each other, the arc reads __________.
N a. 22 1/2° N b. 45° N c. 60° Y d. 90° 243: The loran lines drawn on navigation charts represent __________.
Y a. ground waves N b. skywaves N c. either ground waves or skywaves interchangeably N d. an average between ground wave and skywave positions 326: You are steaming west in the North Atlantic in an extratropical cyclonic storm, and the wind is dead ahead. According to the law of Buys Ballot, the center of low pressure lies to the __________.
Y a. north N b. south N c. east N d. west 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 509: A line of position derived by radar range from an identified point on a coast will be a(n) __________.
N a. straight line Y b. arc N c. parabola N d. line parallel to the coast 515: The small circle of the celestial sphere parallel to the celestial equator, and transcribed by the daily motion of the body, is called the __________.
N a. hour circle of the body Y b. parallel of declination N c. vertical circle of the body N d. parallel of altitude 527: On 6 June 1983, at 1719 EST (ZD +5), what will be the predicted height of tide at Chester, PA?
N a. 0.8 feet( 0.2 meters) Y b. 1.1 feet (0.3 meters) N c. 3.5 feet (1.1 meters) N d. 4.7 feet (1.4 meters) 562: You wish to measure the distance on a Mercator chart between a point in latitude 42°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 __________.
Y a. 41°15' and 41°45' N b. 41°45' and 42°15' N c. 42°15' and 42°45' N d. 42°00' and 42°30' 666: In the Northern Hemisphere, your vessel is believed to be in the direct path of a hurricane, and plenty of sea room is available. The best course of action is to bring the wind on the __________.
N a. starboard bow, note the course, and head in that direction Y b. starboard quarter, note the course, and head in that direction N c. port quarter, note the course, and head in that direction N d. port bow, note the course, and head in that direction 687: The drift and set of tidal, river, and ocean currents refer to the __________.
N a. position and area of the current Y b. speed and direction toward which the current flows N c. type and characteristic of the current's flow N d. None of the above 739: The upper vertex of a great circle track is in LONG 156°00'E. Sailing eastward, the great circle track will cross the equator in LONG __________.
Y a. 114°00'W N b. 110°00'W N c. 66°00'W N d. 66°00'E 760: As a vessel changes course to starboard, the compass card in a magnetic compass __________.
N a. first turns to starboard then counterclockwise to port N b. also turns to starboard Y c. remains aligned with compass north N d. turns counterclockwise to port 770: 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?
Y a. The course and speed made good should be determined and used to advance the LOP. N b. The drift should be added to the ship's speed. N c. The current should be ignored. N d. The set should be applied to the second bearing. 781: The IALA Buoyage Systems do NOT apply to __________.
N a. the sides and centerlines of navigable channels N b. natural dangers and other obstructions, such as wrecks Y c. lighthouses and lightships N d. areas in which navigation may be subject to regulation 851: You would expect to find channels marked with the IALA-A Buoyage System in __________.
N a. the Philippines Y b. Australia N c. Republic of Korea N d. Chile 869: Tropical storms and hurricanes are most likely to form in the Southern hemisphere during __________.
Y a. January through March N b. April through May N c. June through August N d. September through November 875: Sidereal hour angle is always __________.
N a. measured westward from the hour circle containing the first point of Aries N b. measured from the point on the celestial sphere occupied by the Sun at the vernal equinox N c. subtracted from the LHA of the star to obtain the LHA of Aries Y d. All of the above 876: A generally circular low pressure area is called a(n) __________.
Y a. cyclone N b. anticyclone N c. cold front N d. occluded front 943: You should plot your dead reckoning position __________.
N a. when you obtain an estimated position N b. ONLY in piloting waters Y c. at every speed change N d. All of the above are correct. 987: Which current is responsible for the movement of icebergs into the North Atlantic shipping lanes?
N a. Iceland Current N b. Baltic Current Y c. Labrador Current N d. Baffin Current 994: Which list of clouds is in sequence, from highest to lowest in the sky?
N a. Altostratus, cirrostratus, stratus Y b. Cirrostratus, altostratus, stratus N c. Stratus, cirrostratus, altostratus N d. Altostratus, stratus, cirrostratus 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 1105: The Light List shows that a navigational light has a nominal range of 22 miles and a height above water of 48 feet (14.6 meters). Your height of eye is 35 feet (10.7 meters) and the visibility is 20.0 miles. At what approximate range will you first sight the light?
N a. 10.5 nm N b. 13.2 nm Y c. 14.7 nm N d. 32.0 nm 1135: A position on the Earth has a longitude of 74°10'E. Its celestial counterpart would have a __________.
Y a. GHA of 285°50' N b. SHA of 74°10' N c. SHA of 285°50' N d. LHA of 74°10'E 1216: In the Northern Hemisphere, winds veering sharply to the west or northwest with increasing speed are indications that a __________.
Y a. cold front has passed N b. low pressure center is approaching N c. stationary front exists N d. high pressure center has passed 1306: What type of clouds are associated with a cold front?
N a. Altostratus and fracto-cumulus N b. Altostratus and cirrus N c. Cirrus and cirrostratus Y d. Cumulus and cumulonimbus 1349: The symbols shown are used on radio facsimile weather charts. Which of these symbols indicates a severe squall line? (D042NG )
N a. F N b. I Y c. G N d. H 1358: Despite weather predictions for continued good weather, a prudent mariner should be alert for all of the following, EXCEPT a sudden __________.
N a. drop in barometric pressure Y b. drop in temperature N c. wind shift N d. squall line 1377: What is the velocity of the tidal current at the east end of Pollock Rip Channel at 1700 DST (ZD +4) on 23 July 1983?
N a. 0.6 knot ebbing N b. 0.8 knot flooding Y c. 1.5 knots flooding N d. 1.9 knots flooding 1476: When warm moist air blows over a colder surface and is cooled below its dew point, the result is __________.
N a. radiation fog N b. ice fog Y c. advection fog N d. frost smoke 1481: What is the approximate geographic range of Fenwick Island Light, Delaware, if your height of eye is 42 feet (12.8 meters)? Refer to "Reprints from the LIGHT LISTS AND COAST PILOTS".
Y a. 18.3 nm N b. 15.4 nm N c. 13.1 nm N d. 10.3 nm 1535: When observing a rapid rise in barometric pressure, you may expect __________.
N a. clear weather with no wind, but the possibility of rain or snow within 24 hours N b. deteriorating weather with rain or snow N c. heavy rain or severe thundershowers Y d. clearing weather, possibly accompanied by high winds 1563: Neap tides occur only __________.
N a. at a new or full Moon N b. when the Sun, Moon, and Earth are in line N c. at approximately 28-day intervals Y d. when the Moon is at quadrature 1763: Weather patterns in the Gulf Coast area of the United States are __________.
Y a. those of a transition zone between tropical and a temperate area N b. those of a tropical region N c. extremely hot in summer N d. tropical over Florida and subtropical over the rest of the Gulf Coast area 1955: The letter A in illustration D006NG represents the __________.
N a. geoidal horizon Y b. sensible horizon N c. celestial horizon N d. visible horizon 1984: When a dual purpose marking is used, the mariner following the Intracoastal Waterway should be guided by the __________.
N a. color of the aid N b. shape of the aid N c. color of the top band Y d. shape of the yellow mark 1994: Fomalhaut is found in what constellation?
N a. Leo N b. Taurus Y c. Pisces N d. Canis Major 2076: You should plot your dead reckoning position __________.
Y a. from every fix or running fix N b. from every estimated position N c. every three minutes in pilotage waters N d. only in pilotage waters 2145: What lights would you see on the Illinois water way when any wickets of the dam or bear traps are open, or partially open, which may cause a set in the current conditions in the upper lock approach?
N a. Green over red N b. Red over blue N c. Green over amber (yellow) Y d. Red over amber (yellow) 2286: Which light signal indicates that you have permission to enter a lock on the Ohio River?
N a. Steady red N b. Flashing amber N c. Steady green Y d. Flashing green 2299: What condition exists at apogee?
N a. The Earth is closest to the Sun. N b. The Moon is farthest from the Sun. Y c. The Earth is farthest from the Moon. N d. The Moon is between the Earth and the Sun. 2322: You have completed the magnetic compass adjustments on magnetic east and magnetic south. The vessel is now steady on magnetic north but the compass reads 356°. Which action should be taken?
N a. Use the fore-and-aft magnets and adjust the compass until it reads 358°. Y b. Use the athwartships magnets and adjust the compass until it reads 358°. N c. Use the fore-and-aft magnets and adjust the compass until it reads 000°. N d. Use the quadrantal spheres and adjust the compass until it reads 000°. 2375: The shortest distance between any two points on earth defines a __________.
N a. small circle Y b. great circle N c. rhumb line N d. hyperbola 2437: When daylight savings time is kept, the times of tide and current calculations must be adjusted. One way of doing this is to __________.
N a. add 15° to the standard meridian when calculating the time differences N b. apply no correction as the times at the reference stations are adjusted for daylight savings time Y c. add one hour to the times listed for the reference stations N d. subtract one hour from the times listed for the subordinate stations 2479: The equation of time measures the __________.
N a. difference between local apparent time and Greenwich apparent time N b. longitude in time units N c. difference between sidereal time and local time at the Greenwich meridian Y d. time between the passage of the mean sun and the apparent sun over a meridian 2583: You are in the Northern Hemisphere and a tropical wave is located 200 miles due west of your position. Where will the wave be located 24 hours later?
N a. In the same place N b. Closer and to the west N c. Closer and to the east Y d. Farther away to the west 2662: You must construct a Mercator plotting sheet on a piece of paper measuring 24" by 28". The area includes latitude 37°S to 42°S and longitude 175°E to 179°W. Allow a one 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?
N a. 3.33 inches N b. 3.41 inches Y c. 3.67 inches N d. 3.82 inches 2673: A bluff bar is a bar __________.
N a. extending out from a bluff alongside the river N b. that tends to give a false indication of its position Y c. that has a sharp drop off into deep water N d. that is perpendicular to the current 2800: Where is the pivot point of a towboat with a tow ahead?
N a. One-third the length of the combined unit forward of the towboat Y b. One-third the length of the combined unit back from the head N c. At the head of the towboat N d. One-half the length of the combined unit 2895: A white buoy with an orange rectangle on it is a(n) __________.
N a. junction buoy N b. safe water buoy Y c. informational buoy N d. All of the above 2927: The position labeled C, as shown, was plotted because __________. (D051NG )
N a. the vessel's course changed from due North to due East Y b. running fixes are better estimates of true position than dead-reckoning positions N c. the vessel's speed changed N d. All of the above are correct 2964: The pictures shown represent the geographic location of a vessel and the radar presentation at the same time. Which statement is TRUE? (D011NG )
N a. Ship No. 1 does not paint as an individual target due to the side lobe affect. N b. The small island is not detected due to the limitation caused by the pulse length. N c. A tangent bearing of the headland to the south-southeast is corrected by subtracting one-half of the beam width. Y d. Ship No. 2 is not detected due to the combined affects of beam width and pulse length. 2965: Which symbol represents a 10-fathom curve?
N a. ____ ____ ____ N b. ... ____ ... ____ Y c. ____ . _____ . ____ . ____ N d. ........ 2972: You are in a channel inbound from sea. A daymark used to mark a channel junction when the preferred channel is to starboard will have the shape indicated by what letter in illustration D045NG?
Y a. A N b. B N c. C N d. D 3073: ECDIS must give an alarm for which of the following cases?
Y a. If the ship is going to reach a critical point on the planned route N b. When the speed of a dangerous target exceeds a set limit N c. If the ship's ETA has changed beyond the set limit N d. All of the above 3083: Which theoretical minimum number of measurements from satellites does a GPS receiver need in order to provide an exact three-dimensional position?
N a. Five Y b. Four N c. Three N d. Two