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.
5: A vessel is steaming in east longitude on January 25 and crosses the International Date Line on an eastbound course at 0900 zone time. What is the date and time at Greenwich when the vessel crosses the line?
N a. 0900, 24 January Y b. 2100, 24 January N c. 2100, 25 January N d. 0900, 26 January 60: The predicted time that the ebb begins at the entrance to Delaware Bay is 1526. You are anchored off Chestnut St. in Philadelphia. If you get underway bound for sea at 1630 and turn for 12 knots, at what point will you lose the flood current?
Y a. New Castle N b. Reedy Island N c. Mile 44 N d. Ship John Shoal Lt. 96: A weather forecast states that the wind will commence veering. In the Northern Hemisphere this indicates that the wind will __________.
Y a. shift in a clockwise manner N b. shift in a counterclockwise manner N c. continue blowing from the same direction N d. increase in velocity 130: The distance between the surface of the water and the tidal datum is the __________.
N a. range of tide Y b. height of tide N c. charted depth N d. actual water depth 152: A chart with a natural scale of 1:160,000 is classified as a __________.
N a. sailing chart Y b. general chart N c. coast chart N d. harbor chart 291: A buoy marking a wreck will show a(n) __________.
Y a. white light FL (2) and a topmark of 2 black spheres N b. occulting green light and may be lettered N c. yellow light and will be numbered N d. continuous quick white light and may be numbered 363: Your dead reckoning position should be plotted __________.
N a. whenever an estimated position is plotted N b. when it agrees with your loran position N c. when coming on or going off soundings Y d. at least every hour on the hour in the open waters of the sea 454: On what does the operation of an aneroid barometer depend?
Y a. Thin, metal, air tight cell N b. Curved tube containing alcohol N c. Column of mercury supported by atmospheric pressure N d. Expansion of mercury in a closed tube 487: What will be the time after 0600 (ZD +3), on 6 March 1983, that the height of the tide at Puerto Rosales, Argentina, will be 9.0 feet (2.7 meters)?
N a. 0740 N b. 0754 N c. 0840 Y d. 0922 524: An anemometer on a moving vessel measures __________.
Y a. apparent wind speed only N b. true wind speed and true wind direction N c. true wind speed only N d. apparent wind speed and true wind direction 544: The instrument most commonly used to gather the data for determining the relative humidity is the __________.
N a. hydrometer Y b. psychrometer N c. barometer N d. anemometer 548: When the declination of the Moon is 0°12.5'S, you can expect some tidal currents in Gulf Coast ports to __________.
N a. have either a double ebb or a double flood N b. become reversing currents Y c. become weak and variable N d. exceed the predicted velocities 558: A buoy bears 176°T at 3000 yards. What is the course to make good to leave the buoy 100 yards to starboard?
Y a. 174°T N b. 176°T N c. 178°T N d. 180°T 691: Of the four light characteristics shown which one does NOT represent a safe water mark of the IALA Buoyage System? (D019NG )
Y a. A N b. B N c. C N d. D 738: Most GPS receivers use the Doppler shift of the carrier phase to compute __________.
N a. Latitude N b. Longitude Y c. Speed N d. Time 763: Time signals broadcast by WWV and WWVH are transmitted __________.
N a. every 15 minutes N b. every 30 minutes N c. every hour Y d. continuously throughout day 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 800: You are to sail from Elizabethport, NJ, on 17 November 1983 with a maximum draft of 27 feet. You will pass over an obstruction in the channel near Sandy Hook that has a charted depth of 26 feet. The steaming time from Elizabethport to the obstruction is 1h 50m. What is the earliest time (ZD +5) you can sail on 17 November and pass over the obstruction with 2 feet of clearance?
Y a. 0056 N b. 0124 N c. 0154 N d. 0218 841: Under the IALA-A Buoyage system, a buoy marking the port hand of the channel when approaching from seaward may NOT have a __________.
N a. red light Y b. conical shape N c. group-flashing light N d. square topmark 867: Which ocean current is "warm" based on the latitude in which it originates and on the effect it has on climate?
Y a. Kuroshio Current N b. Benguela Current N c. Peru Current N d. California Current 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 1038: You are preparing a weather report form, WS Form B-80. The dry bulb thermometer reads 54°F, and the wet bulb thermometer reads 50°F. How would you encode the air temperature groups in the report? (D041NG )
N a. 1054/, 2050/ Y b. 10122, 2008/ N c. 1054/, 2047/ N d. 054//, 047// 1039: While taking weather observations, you determine that the wind is coming from the west. In the weather log, you would record the wind direction as __________.
N a. 000° N b. 090° N c. 180° Y d. 270° 1065: You are in the Northern Hemisphere and a tropical wave is located 200 miles due east of your position. Where will the wave be located 12 hours later?
N a. Farther away to the east N b. In the same position Y c. Nearby to the east N d. Farther away to the west 1159: Two navigational hazards are located near to each other, but each is marked by an individual cardinal buoyage system. The buoys of one cardinal system may be identified from the other system by __________.
N a. the differing light colors N b. one system having odd numbers while the other system has even numbers N c. one system using horizontal bands while the other system uses vertical stripes Y d. the difference in the periods of the light 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 1266: A line of clouds, sharp changes in wind direction, and squalls are most frequently associated with a(n) __________.
N a. occluded front N b. warm front Y c. cold front N d. warm sector 1273: Deviation changes with a change in __________.
N a. latitude Y b. heading N c. longitude N d. sea conditions 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 1400: Which type of cloud is among the most dependable for giving an indication of an approaching weather system?
N a. Cumulus Y b. Altostratus N c. Cumulostratus N d. Nimbus 1423: Quadrantal error in a gyrocompass has its GREATEST effect __________.
N a. in high latitudes N b. near the equator N c. on north or south headings Y d. on intercardinal headings 1441: Your height of eye is 40 feet (12.2 meters). What is the approximate geographical distance at which Ambrose Light, NY, could be visible? Refer to "Reprints from the LIGHT LISTS AND COAST PILOTS".
N a. 18.3 nm N b. 19.5 nm Y c. 21.0 nm N d. 22.8 nm 1463: If the gyrocompass error is east, what describes the error and the correction to be made to gyrocompass headings to obtain true headings?
Y a. The readings are too low (small numerically) and the amount of the error must be added to the compass to obtain true N b. The readings are too low and the amount of the error must be subtracted from the compass to obtain true N c. The readings are too high (large numerically) and the amount of the error must be added to the compass to obtain true N d. The readings are too high and the amount of the error must be subtracted from the compass to obtain true 1489: Cumulonimbus clouds can produce __________.
N a. dense fog and high humidity Y b. gusty winds, thunder, rain or hail, and lightning N c. clear skies with the approach of a cold front N d. a rapid drop in barometric pressure followed by darkness 1543: The distance between the surface of the water and the tidal datum is the __________.
Y a. height of tide N b. charted depth N c. actual water depth N d. range of tide 1585: The sidereal day begins when the __________.
Y a. first point of Aries is over the upper branch of the reference meridian N b. Sun is over the lower branch of the reference meridian N c. Sun is over the upper branch of the reference meridian N d. first point of Aries is over the lower branch of the reference meridian 1611: What indicates a dual purpose buoy?
N a. Red buoy with a horizontal yellow band N b. Red and white vertically-striped buoy with a vertical yellow stripe N c. Red and white vertically-striped buoy with a red spherical topmark Y d. Green buoy with a yellow square 1615: The Illustration shows the symbols used on radio facsimile weather charts. Which symbol indicates snow? (D042NG )
N a. G N b. H Y c. M N d. N 1626: Which instrument is used to measure the relative humidity of the air?
N a. A hydrometer Y b. A hygrometer N c. A spectrometer N d. A barograph 1788: You can follow the approach of a dangerous cyclonic storm by inspecting __________.
N a. the Coast Pilot or Sailing Directions N b. the National Weather Service Observing Handbook No.1, Marine Surface Observations Y c. a weather forecast N d. the sky overhead 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 1920: Because the actual center of some planets may differ from the observed center, the navigator applies a correction known as the __________.
Y a. phase correction N b. refraction correction N c. semidiameter correction N d. augmentation correction 1974: Ocean currents are well defined and __________.
N a. create large waves in the direction of the current N b. change direction 360° during a 24 hour period Y c. remain fairly constant in direction and velocity throughout the year N d. are characterized by a light green color 2252: The vertical angle between the horizontal and the magnetic line of force is the __________.
N a. elevation N b. magnetic angle N c. vertical angle Y d. dip 2252: The vertical angle between the horizontal and the magnetic line of force is the __________.
N a. elevation N b. magnetic angle N c. vertical angle Y d. dip 2258: The primary use of apparent time in marine navigation is to __________.
N a. calculate sunrise or sunset N b. determine zone time N c. enter an almanac Y d. determine the time of meridian transit 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. 2306: In the North Sea area, you sight a buoy showing a quick white light with 9 flashes every 15 seconds. Which of the four topmarks shown would be fitted to the buoy? (D031NG )
Y a. A N b. B N c. C N d. D 2338: A group of stars which appear close together and form a striking configuration such as a person or animal is a __________.
N a. cluster N b. shower Y c. constellation N d. galaxy 2360: What U.S. agency is responsible for NAVAREA warnings?
N a. Coast Guard N b. National Oceanic and Atmospheric Administration N c. National Ocean Service Y d. National Geospatial-Intelligence Agency 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 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 2814: In low latitudes the range of the diurnal variation of pressure is up to __________.
N a. 0.5 millibar Y b. 3.0 millibars N c. 6.0 millibars N d. 10.0 millibars 2862: When slanted letters are used to spell the name of a charted object you know the __________.
N a. object is only a hazard to vessels drawing in excess of 20 feet N b. position is approximate or doubtful N c. object is always visible Y d. object may cover and uncover with the tide 2866: Some locations maintain a zone time of -13. What are the zone time and date if the Greenwich time and date are 2152, 10 January?
N a. 1052, 9 January N b. 0852, 10 January N c. 1052, 10 January Y d. 1052, 11 January 2887: The letter B in illustration D006NG represents the __________.
N a. visible horizon N b. sensible horizon Y c. geoidal horizon N d. celestial horizon 3004: While navigating in fog off a coastline of steep cliffs, you hear the echo of the ship's fog horn 4 seconds after the signal was sounded. What is the distance to the shore?
N a. 209 yards N b. 363 yards N c. 480 yards Y d. 730 yards 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 3119: Automatic identification systems (AIS) are required to __________.
N a. provide safety-related information automatically to shore stations, other vessels and aircraft N b. receive safety-related information automatically from similarly equipped vessels N c. exchange safety-related information with shore-based facilities Y d. All of the above 3130: When may the automatic identification system (AIS) be switched off?
N a. At anytime as long as it is properly logged. Y b. At the Master's professional judgment. N c. Only when the vessel is at anchor or in port. N d. Under no circumstance.