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.
69: The parallax angle will vary the most with the time of year for __________.
Y a. Venus N b. Jupiter N c. Saturn N d. Polaris 72: The datum from which the predicted heights of tides are reckoned in the tide tables is __________.
N a. mean low water Y b. the same as that used for the charts of the locality N c. the highest possible level N d. given in table three of the tide tables 149: You are underway on course 050°T and your maximum speed is 13 knots. The eye of a hurricane bears 100°T, 120 miles from your position. The hurricane is moving towards 275°T at 25 knots. What course should you steer at 13 knots to have the maximum CPA?
N a. 339° Y b. 333° N c. 326° N d. 320° 167: When the Moon's declination is maximum north, which of the following will occur?
N a. Mixed-type tides N b. Higher high tides and lower low tides Y c. Tropic tides N d. Equatorial tides 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 356: When facing into the wind in the Northern Hemisphere the center of low pressure lies __________.
N a. directly in front of you N b. directly behind you N c. to your left and behind you Y d. to your right and behind you 374: There are seven sources of error in the marine sextant. Of the four errors listed, which one is adjustable?
Y a. Error of collimation N b. Prismatic error N c. Graduation error N d. Centering error 534: What is TRUE concerning an anemometer on a moving vessel?
N a. It measures true wind speed. N b. It measures true wind speed and true wind direction. Y c. It measures apparent wind speed. N d. It measures apparent wind speed and true wind direction. 565: The letter B as shown represents the __________. (D006NG )
Y a. geoidal horizon N b. celestial horizon N c. visible horizon N d. sensible horizon 596: Which condition would NOT indicate the approach of a tropical storm?
N a. Long, high swells N b. Cirrus clouds N c. Halos about the Sun or Moon Y d. Decrease in wind velocity 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 625: The center of a circle of equal altitude, plotted on the surface of the Earth, is the __________.
N a. dead reckoning position of the observer N b. assumed position of the observer Y c. geographical position of the body N d. assumed position of the body 637: Your draft is 24 feet. You wish to pass over an obstruction near Lovell Island, MA, on 6 May 1983. The charted depth is 22 feet. Allowing a safety margin of 3.0 feet, what is the earliest time after 0200 DST (ZD +4) that this passage can be made?
N a. 0215 N b. 0245 N c. 0310 Y d. 0347 660: What is the length of a nautical mile?
N a. 1,850 meters N b. 5,280 feet N c. 1,760 yards Y d. 6,076 feet 772: You are hove to in a hurricane on a heading of 328°T. The wind is from 030° true at 119 knots. How should this be encoded on the weather report form under Nddff. (D041NG )
N a. 80312 N b. 83011 N c. 83099 Y d. 80399 777: With respect to a reversing current, slack water occurs when there is __________.
Y a. little or no horizontal motion of the water N b. little or no vertical motion of the water N c. a weak ebb or flood current N d. when winds cause water to back up in a river mouth 843: The line which connects the points of zero magnetic dip is __________.
N a. an agonic line Y b. the magnetic equator N c. a magnetic meridian N d. All of the above 934: Clouds that form as small white flakes or scaly globular masses covering either small or large portions of the sky are __________.
N a. cirrus N b. cirrostratus N c. altostratus Y d. cirrocumulus 967: On an Atlantic Ocean voyage from New York to Durban, South Africa, you should expect the Agulhas Current to present a strong __________.
N a. offshore set N b. onshore set Y c. head current N d. fair or following current 1033: Deviation which is maximum on intercardinal compass headings may be removed by the __________.
N a. Flinders bar N b. transverse magnets N c. fore-and-aft magnets Y d. soft iron spheres on the sides of the compass 1042: What is the approximate geographic range of Shinnecock Light, NY, if your height of eye is 24 feet (7.3 meters)? Refer to "Reprints from the LIGHT LISTS AND COAST PILOTS" .
N a. 8.7 nm N b. 9.9 nm N c. 14.4 nm Y d. 15.9 nm 1062: What is the approximate geographic range of Horton Point Light, NY, if your height of eye is 40 feet (12.2 meters)? Refer to "Reprints from the LIGHT LISTS AND COAST PILOTS" .
N a. 18.8 nm Y b. 19.3 nm N c. 20.3 nm N d. 24.8 nm 1099: You are enroute to assist vessel A. Vessel A is underway at 6 knots on course 133°T, and bears 343°T at 92 miles from you. What is the course to steer at 9 knots to intercept vessel A?
N a. 356° Y b. 003° N c. 022° N d. 038° 1113: A single vertical magnet placed underneath the compass in the binnacle is used to compensate for __________.
N a. the horizontal component of the permanent magnetism Y b. deviation caused by the vessel's inclination from the vertical N c. induced magnetism in the horizontal soft iron N d. induced magnetism in the vertical soft iron 1122: A barometer showing falling pressure indicates the approach of a __________.
N a. high pressure system Y b. low pressure system N c. high dew point N d. low dew point 1128: In 1981, when would Jupiter and Saturn be visible in temperate latitudes for both evening and morning stars?
N a. 10 January Y b. 27 March N c. 22 June N d. 8 October 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 1273: Deviation changes with a change in __________.
N a. latitude Y b. heading N c. longitude N d. sea conditions 1282: Entering from sea, a daymark on the port side of the channel would be indicated on a chart by a __________.
N a. red triangle with the letter R N b. white triangle with the letters RG Y c. green square with the letter G N d. white square with the letters GR 1284: The Sailing Directions (Enroute) contain information on all of the following EXCEPT __________.
Y a. ocean currents N b. outer dangers to navigation N c. tidal currents N d. major port anchorages 1387: You will be entering the Mystic River in Connecticut. What is the current at the Highway Bridge at 1900 EST (ZD +5) on 24 January 1983?
N a. 2.2 knots flooding N b. Slack water Y c. Slight ebb N d. 2.5 knots ebbing 1391: When a light is first seen on the horizon it will disappear again if the height of eye is immediately lowered several feet. When the eye is raised to its former height the light will again be visible. This process is called __________.
N a. checking a light N b. raising a light N c. obscuring a light Y d. bobbing a light 1534: You are preparing a weather report form, WS Form B-80. Your position is LAT 22°31'S, LONG 138°19'W. How would this be encoded? (D041NG )
N a. LAT 22.5°S, LONG 138.3°W Y b. 99225, 51383 N c. L2231, 53819 N d. 2231S, 5383W 1541: You are preparing a weather report form, WS Form B-80. Your position is LAT 49°35'N, LONG 162°49'E. How would this be encoded? (D041NG )
Y a. 99496, 11628 N b. 94935, 96249 N c. L4935, 16249 N d. L496N, 1628E 1547: Which light combination does NOT indicate a navigational channel passing under a fixed bridge?
Y a. Red lights on the LDB and green lights on the RDB N b. Three white lights in a vertical line N c. Two green lights in a range under the span N d. A fixed red light on each pier at the channel edge 1560: Under the IALA-A and B Buoyage Systems, a buoy with alternating red and white vertical stripes indicates __________.
Y a. that there is navigable water all around N b. an isolated danger exists N c. that the preferred channel is to port N d. that the preferred channel is to starboard 1608: When using a buoy as an aid to navigation which of the following should be considered?
N a. If the light is flashing the buoy should be considered to be in the charted location. Y b. The buoy may not be in the charted position. N c. The buoy should be considered to be in the charted position if it has been freshly painted. N d. The buoy should be considered to always be in the charted position. 1609: A rapid rise or fall of the barometer indicates __________.
N a. heavy rain within six hours N b. a decrease in wind velocity Y c. a change in the present weather conditions N d. that fog will soon set in 1703: In the Northern Hemisphere, when the wind at your location is northerly, the low pressure center causing the wind is located to your __________.
N a. NNW N b. WSW Y c. ESE N d. SSW 1727: What enables you to estimate the bearing of a storm's center?
Y a. Buys Ballot's Law N b. An educated guess N c. Pascal's Law N d. The left-hand rule 1781: While in port, you can follow the approach of a dangerous cyclonic storm by inspecting __________.
N a. the sky overhead N b. the National Weather Service Observing Handbook No.1, Marine Surface Observations N c. the Coast Pilot or Sailing Directions Y d. a weather map 1795: Which weather element cannot be measured accurately while on board a moving vessel?
N a. Relative humidity Y b. Cloud base height N c. Temperature N d. Atmospheric pressure 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 2140: The visible range marked on charts for lights is the __________.
N a. minimum distance at which the light may be seen with infinite visibility N b. minimum distance at which the light may be seen based on a 12 mile distance to visible horizon N c. maximum distance the light may be seen restricted by the height of the light and the curvature of the earth Y d. maximum distance at which a light may be seen in clear weather with 10 miles visibility 2158: Permanent magnetism is caused by __________.
N a. operation of electrical equipment and generators on board ship Y b. the earth's magnetic field affecting the ship's hard iron during construction N c. the horizontal component of the earth's magnetic field acting on the horizontal soft iron N d. the vertical component of the earth's magnetic field acting on the vertical soft iron 2256: The constellation that contains Polaris is __________.
N a. Orion N b. Cassiopeia Y c. Ursa Minor N d. Corona Borealis 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' 2329: In low latitudes, a last quarter moon will always rise at about __________.
N a. sunrise N b. 1200 LMT N c. sunset Y d. 2400 LMT 2345: You should plot your dead reckoning position __________.
N a. from every estimated position N b. every three minutes in pilotage waters N c. only in pilotage waters Y d. from every fix or running fix 2429: The lock chamber is 600 feet X 110 feet. Your towboat is 150 feet X 35 feet. Which of these tows will require a double lockage?
N a. A set-over single N b. 4 standard barges abreast next to your boat's head and 3 jumbo abreast in the lead N c. 6 jumbo (3 abreast and 2 long) with a standard on each side of your boat Y d. 9 jumbo barges 2516: Apparent time is based on __________.
N a. a fictitious sun moving along the celestial equator Y b. the visible sun moving along the ecliptic N c. the Moon's motion in relation to the Sun N d. the movement of the first point of Aries 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 2604: A sidereal day is approximately how much shorter than a solar day?
Y a. 4 minutes N b. 8 minutes N c. 12 minutes N d. 16 minutes 2609: The letter A in illustration D006NG represents the __________. (D006NG )
N a. geoidal horizon N b. celestial horizon N c. visible horizon Y d. sensible horizon 2652: The dividing meridian between zone descriptions -10 and -11 is __________.
N a. 135°30'E N b. 145°00'E N c. 150°00'E Y d. 157°30'E 2710: In the horizon system of coordinates what is equivalent to the local hour angle of the celestial equator system?
N a. Altitude Y b. Azimuth N c. Zenith distance N d. Colongitude 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 2924: You take a bearing of 264° of a lighthouse. What bearing of another object would give the best fix?
N a. 289° Y b. 350v N c. 081° N d. 120° 2965: Which symbol represents a 10-fathom curve?
N a. ____ ____ ____ N b. ... ____ ... ____ Y c. ____ . _____ . ____ . ____ N d. ........ 3038: In low latitudes, the low(s) of the diurnal variation of pressure occur(s) at __________.
N a. noon N b. noon and midnight N c. 1000 and 2200 Y d. 0400 and 1600