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.
25: You are in LONG 144°E. The date is 6 February, and the zone time is 0800. The Greenwich date and time are __________.
Y a. 2200, 5 February N b. 2300, 5 February N c. 1700, 6 February N d. 1800, 6 February 32: The datum used for soundings on charts of the Atlantic Coast of the United States is mean __________.
N a. low water Y b. lower low water N c. higher high water N d. high water 35: You are on a vessel at 0400 ZT on 3 July, and the ZD for your position is -8. What is the GMT?
N a. 1200, 3 July N b. 2000, 3 July N c. 1200, 2 July Y d. 2000, 2 July 242: The difference between the heights of low and high tide is the __________.
Y a. range N b. period N c. depth N d. distance 290: The true wind is from 330°T, speed 6 knots. You want the apparent wind to be 30 knots from 10° on your port bow. To what course and speed must you change?
N a. Cn 240°, 28.0 knots N b. Cn 270°, 28.0 knots N c. Cn 180°, 30.0 knots Y d. Cn 090°, 32.5 knots 312: The depth of water on a chart is indicated as 23 meters. This is equal to __________.
N a. 11.5 fathoms Y b. 12.6 fathoms N c. 69.0 feet N d. 78.6 feet 324: Index error of a sextant is primarily caused by __________.
N a. improperly correcting the other errors in a sextant N b. the horizon glass not being parallel to the horizon mirror Y c. the horizon glass not being parallel to the index mirror N d. human error in taking a celestial observation 347: The illustration shows the symbols used on radio facsimile weather charts. Which of these symbols indicates rain? (D042NG )
Y a. N N b. M N c. I N d. G 409: On November 1st the zone time is 1700 EST (ZD +5) in LONG 75°W. What is the corresponding zone time and date in LONG 135°E?
Y a. 0700, November 2nd N b. 0700, November 1st N c. 2200, November 1st N d. 2200, October 31st 421: Daylight savings time is a form of zone time that adopts the time __________.
N a. one zone to the west Y b. one zone to the east N c. two zones to the west N d. two zones to the east 442: In very high latitudes, the most practical chart projection is the __________.
N a. Mercator N b. gnomonic N c. azimuthal Y d. Lambert conformal 543: A radar display which is oriented, so that north is always at the top of the screen, is called a(n) __________.
N a. relative display N b. composite display Y c. stabilized display N d. unstabilized display 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 617: You are bound for the Chelsea docks in the Hudson River. The Captain wants to arrive at the docks at the first slack water on 28 July 1983. You are keeping daylight saving time. What time should you be at the docks?
Y a. 0215 N b. 0530 N c. 0811 N d. 0911 705: The precession of the equinoxes occurs in a(n) __________.
N a. easterly direction Y b. westerly direction N c. northerly direction N d. southerly direction 711: In the IALA Maritime Buoyage System, a red and white vertically-striped buoy is used as a(n) __________.
Y a. safe water mark N b. cardinal mark N c. isolated danger mark N d. special mark not primarily used for navigation 719: You are on course 209°T. In order to check the longitude of your vessel, you should observe a celestial body on which bearing?
N a. 209° Y b. 270° N c. 299° N d. 000° 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 789: The dangerous semicircle of a hurricane in the Northern Hemisphere is that area of the storm __________.
Y a. to the right of the storm's track N b. measured from true north clockwise to 180°T N c. measured from true north counterclockwise to 180°T N d. between the ship's heading and the bearing to the eye 878: At 0600 ZT on 31 January, your position is LAT 00°49'S, LONG 84°27'E. You are preparing a weather report form, WS Form B-80. How should you encode the first three groups after the call sign if you estimate the wind? (D041NG )
N a. 30243, 90008, 30848 N b. 31003, 99049, 38427 Y c. 31003, 99008, 30844 N d. 31063, 99049, 58427 880: You are taking bearings on two known objects ashore. The BEST fix is obtained when the angle between the lines of position is __________.
N a. 60° Y b. 90° N c. 45° N d. 30° 961: In which country would you expect the channels to be marked with the IALA-B Buoyage System?
Y a. Brazil N b. Tanzania N c. New Zealand N d. Norway 979: Which kind of conditions would you observe as the eye of a storm passes over your vessel's position?
Y a. Huge waves approaching from all directions, clearing skies, light winds, and an extremely low barometer N b. Flat calm seas, heavy rain, light winds, and an extremely low barometer N c. Flat calm seas, heavy rain, light winds, and high pressure N d. Huge waves approaching from all directions, clearing skies, light winds, and high pressure 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 1004: A low, uniform layer of cloud resembling fog, but not resting on the ground, is called __________.
N a. cumulus N b. nimbus Y c. stratus N d. cirrus 1051: Under the IALA Buoyage Systems, a cardinal mark may NOT be used to __________.
N a. indicate that the deepest water in an area is on the named side of the mark N b. indicate the safe side on which to pass a danger N c. draw attention to a feature in the channel such as a bend, junction, bifurcation, or end of a shoal Y d. indicate the port and starboard sides of well-defined channels 1052: What is the approximate geographic range of Southwest Ledge Light, Connecticut, if your height of eye is 32 feet (9.8 meters)? Refer to "Reprints from the LIGHT LISTS AND COAST PILOTS" .
Y a. 15.5 nm N b. 13.4 nm N c. 8.7 nm N d. 6.9 nm 1121: The articulated light is superior to other types of buoys because __________.
N a. the radar reflectors reflect better signals N b. fog horn signals travel farther to sea N c. it is equipped with strobe lights Y d. it has a reduced watch circle 1153: Heeling error is defined as the change of deviation for a heel of __________.
N a. 2°While the vessel is on an intercardinal heading Y b. 1°While the vessel is on a compass heading of 000° N c. 2° and is constant on all headings N d. 1° while the vessel is on a compass heading of 180° 1395: The lunar day is __________.
Y a. longer than a solar day N b. shorter than a solar day N c. the same length as the solar day N d. longer than a solar day during the summer months and shorter in winter months 1469: The charted channel depth at Eastport, ME, is 28 feet. You are drawing 31.5 feet and wish 2 feet clearance under the keel. What is the earliest time after 1700 (ZD +4) on 6 September 1983 that you can enter the channel?
N a. 1825 N b. 1903 Y c. 1915 N d. 2003 1505: At 0000 you fix your position and change course to 090°T. At 0030 you again fix your position and it is 0.5 mile east of your DR. Which statement is TRUE?
Y a. The current is easterly. N b. The drift is 0.5 knot. N c. You should alter course to the right to regain the track line. N d. The current is perpendicular to your track line. 1696: Two well-developed high pressure areas may be separated by a __________.
N a. hill of low pressure Y b. trough of low pressure N c. valley of low pressure N d. ridge of low pressure 1697: In the Northern Hemisphere, if the center of a high pressure area is due west of you, what wind direction would you expect?
N a. South to west N b. South to east Y c. North to west N d. North to east 1793: Which weather element cannot be measured accurately while on board a moving vessel?
N a. relative humidity N b. temperature Y c. true wind speed N d. atmospheric pressure 1868: Illustration D036NG represents a fixed C of E lock and dam. What navigational light(s) is(are) exhibited at the position indicated by the letter A in the illustration? (D036NG )
Y a. One red light N b. Two red lights N c. Two green lights N d. Three green lights 1906: In the horizon system of coordinates what is equivalent to latitude on the Earth?
Y a. Altitude N b. Zenith N c. Declination N d. Zenith distance 1930: The phase correction should be applied to sights of Venus and Mars __________.
N a. during day time observations only Y b. during twilight observations only N c. at all times N d. when observed at altitudes of less than 25° 1951: Spring tides occur __________.
Y a. when the moon is new or full N b. when the moon and sun have declination of the same name N c. only when the moon and sun are on the same sides of the earth N d. at the beginning of spring when the sun is over the equator 1962: When outbound from a U.S. port, a buoy displaying a flashing red light indicates __________.
Y a. the port side of the channel N b. a sharp turn in the channel to the right N c. a junction with the preferred channel to the left N d. a wreck to be left on the vessel's starboard side 2088: Information about major breakdowns, repairs, or other emergency operations with regard to weirs and (or) wicket dams, on the western rivers, may be obtained by consulting the __________.
N a. Sailing Directions N b. Light List Vol. V N c. U.S. Coast Pilot Y d. Broadcast Notice to Mariners 2143: 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?
Y a. Red over amber (yellow) N b. Green over amber (yellow) N c. Red over Green N d. Green over Red 2177: This diagram represents a movable dam. If there is high water and the wickets are down so that there is an unobstructed navigable pass through the dam, what light(s) will be shown at D if the lock walls and piers are not awash? (D037NG )
N a. One amber light N b. Three red lights N c. Two red lights Y d. One red light 2192: Off Fire Island, NY, with winds from the southwest, the average wind-driven current flows in a direction of __________.
N a. 256° N b. 170° Y c. 076° N d. 014° 2353: A single line of position combined with a dead-reckoning position results in a(n) __________.
Y a. estimated position N b. assumed position N c. fix N d. running fix 2440: You are on course 357°T and take a relative bearing of a lighthouse of 180°. What is the true bearing to the lighthouse?
N a. 003° N b. 227° Y c. 177° N d. 363° 2458: In the U.S. Aids to Navigation System on the Western Rivers, the light characteristic of group flashing (2) is used for lights on __________.
N a. the right descending bank Y b. the left descending bank N c. preferred channel buoys N d. daymarks with no lateral significant 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. 2528: Illustration D038NG represents a fixed C of E lock and dam. What navigational light(s) is(are) exhibited at the position indicated by the letter A in the illustration? (D038NG )
N a. One red light N b. Two red lights N c. Two green lights Y d. No light 2606: The measurement of local time is based on the passage of the Sun over the __________.
N a. upper branch of the observer's meridian Y b. lower branch of the observer's meridian N c. upper branch of the Greenwich meridian N d. lower branch of the Greenwich meridian 2666: The following boats are approaching a lock. Which has priority for locking?
N a. An 85-foot yacht Y b. Corps of Engineer towboat running empty-headed N c. "Delta Queen" (passenger vessel) N d. An integrated chemical tow 2669: Under the IALA Buoyage System, which topmark shown will be displayed on a safe water mark? (D023NG )
Y a. A N b. B N c. C N d. D 2739: A daymark used to indicate the starboard side of the channel when approaching from seaward will have the shape indicated by what letter in illustration D045NG?
N a. A N b. B N c. C Y d. D 2760: You are pushing a tow ahead, at high speed, near the right hand bank of a canal. The forces affecting your towboat and tow will tend to __________.
N a. push both the head of the tow and the stern of the towboat away from the right hand bank Y b. push the head of the tow away from, and pull the stern of the towboat into, the right hand bank N c. pull both the head of the tow and the stern of the towboat into the right hand bank N d. pull the head of the tow into, and push the stern of the towboat away from, the right hand bank 2832: The Light List indicates that a dayboard is a type MR. You should __________.
Y a. leave it on either side N b. look for the other dayboard forming the range N c. look for an all red daymark N d. check to enter the correct channel at this junction daymark 2846: Which type of daymark is used to mark the port side of the channel when entering from sea?
N a. Red and white octagon N b. Black and white diamond N c. Red triangle Y d. Green square 2884: The pictures shown represent the geographic location of a vessel and the radar presentation at the same time. Which statement is TRUE? (D011NG )
Y a. Ship No. 1 does not appear as an individual target due to the effect of beam width. N b. Small island is not detected due to the multiple echo effect from the mountain. N c. A tangent bearing of the headland to the south-southeast is corrected by subtracting one-half of the beam width. N d. Ship No. 2 is not detected due to the side lobe effect of radar reflecting from the mountain. 2900: Who should be consulted for changing conditions of controlling depths in major channels?
N a. U.S. Coast Guard N b. National Geospatial-Intelligence Agency N c. National Ocean Service Y d. U.S. Army Corps of Engineers 2922: The Light List indicates that a dayboard is a type TR-SY. You should __________.
N a. look for a dayboard of type TR-TY to form a range Y b. leave it to port when southbound on the Atlantic portions of the ICW N c. pass it close aboard on either side N d. expect a daymark with no lateral significance