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.
17: "Stand" of the tide is that time when __________.
Y a. the vertical rise or fall of the tide has stopped N b. slack water occurs N c. tidal current is at a maximum N d. the actual depth of the water equals the charted depth 31: When approaching a preferred-channel buoy, the best channel is NOT indicated by the __________.
Y a. light characteristic N b. color of the uppermost band N c. shape of an unlighted buoy N d. color of the light 62: Charted depth is the __________.
N a. vertical distance from the chart sounding datum to the ocean bottom, plus the height of tide Y b. vertical distance from the chart sounding datum to the ocean bottom N c. average height of water over a specified period of time N d. average height of all low waters at a place 85: Your longitude is 179°59'W. The LMT at this longitude is 23h 56m of the 4th day of the month. Six minutes later your position is 179°59'E longitude. Your LMT and date is now __________.
N a. 00h 02m on the 4th N b. 00h 02m on the 5th N c. 23h 50m on the 5th Y d. 00h 02m on the 6th 238: The predicted time that the flood 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 1430 and turn for 11 knots, at what point will you lose the ebb current?
N a. New Castle Y b. Liston Pt. N c. Arnold Pt. N d. Ship John Shoal Lt. 240: In a river subject to tidal currents, the best time to dock a ship without the assistance of tugs is __________.
N a. at high water N b. when there is a following current Y c. at slack water N d. at flood 248: What is the index error of sextant A in illustration D050NG? (D050NG )
N a. 0° 10' off the arc N b. 0° 10' on the arc N c. 3° 00' off the arc Y d. 4° 20' off the arc 295: The difference (measured in degrees) between the GHA of the body and the longitude of the observer is the __________.
N a. right ascension Y b. meridian angle N c. SHA of the observer N d. zenith distance 298: A great circle crosses the equator at 173°E. It will also cross the equator at what other longitude?
Y a. 7°W N b. 73°E N c. 73°W N d. 173°W 325: What is the longitude of the geographical position of a body whose Greenwich hour angle is 210°30'?
N a. 30°30'E N b. 59°30'W N c. 120°30'W Y d. 149°30'E 336: You are steaming eastward 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 the low pressure lies __________.
N a. ahead of you N b. astern of you N c. to the north Y d. to the south 345: A navigator fixing a vessel's position by radar __________.
N a. should never use radar bearings N b. should only use radar bearings when the range exceeds the distance to the horizon Y c. can use radar information from one object to fix the position N d. must use information from targets forward of the beam 458: The prevailing westerlies of the Southern Hemisphere blow 18-30 knots __________.
Y a. all year long N b. during the summer months only N c. during the winter only N d. during spring only 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 639: In the Northern Hemisphere, what type of cloud formations would you expect to see to the west of an approaching tropical wave?
Y a. Cumulus clouds lined up in rows extending in a northeast to southwest direction N b. High altostratus clouds in the morning hours N c. Cirrostratus clouds lined up in rows extending in a northeast to southwest direction N d. Cirrostratus clouds lined up in rows extending in a north to south direction 667: The navigable semicircle of a typhoon in the Southern Hemisphere is the area __________.
N a. behind the typhoon, measured from 90° to 180°From each side of the storm's track Y b. to the right of the storm's track N c. ahead of the typhoon, measured from the storm's track to 90° on each side N d. measured from due south, counterclockwise 180° 683: A radar contact will remain stationary on a relative motion radar display only when it is __________.
N a. on the same course as your vessel N b. at the same speed as your vessel Y c. on the same course and speed as your vessel N d. on a reciprocal course at the same speed as your vessel 731: Under the IALA Buoyage Systems, a vertically-striped buoy may be striped red and __________.
N a. green N b. black Y c. white N d. yellow 795: The path of a celestial body during its daily apparent revolution around the Earth is called its __________.
N a. ecliptic Y b. diurnal circle N c. altitude circle N d. circle of position 868: Your ship received a HYDROLANT advising of a special warning to mariners from the Department of State for ships in the Persian Gulf. You are 400 miles south of, and bound for, the Persian Gulf. What action should you take?
N a. Continue on course as the warning is advisory in nature only. Y b. Send an AMVER report and acknowledge receipt of the warning. N c. Remain a minimum of 500 miles outside the Persian Gulf and maintain radio silence. N d. Send a MERWARN message advising your position, course, speed and intentions. 871: Under the IALA-A Buoyage System, a buoy marking the starboard side of the channel when approaching from seaward must have a(n) __________.
N a. pillar shape Y b. green color N c. square topmark N d. even number 879: You are enroute to assist vessel A. Vessel A is underway at 4.5 knots on course 233°T, and bears 346°T at 68 miles from you. What is the course to steer at 13 knots to intercept vessel A?
Y a. 328° N b. 323° N c. 318° N d. 314° 954: A thin, whitish, high cloud popularly known as "mares' tails" is __________.
N a. altostratus N b. stratus N c. cumulus Y d. cirrus 1022: What is the approximate geographic range of Fenwick Island Light, Delaware, if your height of eye is 37 feet (11.6 meters)? Refer to "Reprints from the LIGHT LISTS AND COAST PILOTS" .
N a. 24.8 nm Y b. 17.8 nm N c. 15.9 nm N d. 10.3 nm 1089: You are enroute to assist vessel A. Vessel A is underway at 5.5 knots on course 033°T, and bears 248°T at 64 miles from you. What is the course to steer at 13 knots to intercept vessel A?
Y a. 262° N b. 269° N c. 276° N d. 281° 1191: You plot a fix using three lines of position and find they intersect in a triangle. The actual position of the vessel __________.
N a. is outside of the triangle N b. may be anywhere in the triangle Y c. may be inside or outside of the triangle N d. is the geometric center of the triangle 1194: In the Northern Hemisphere, an observer at point II in the weather system should experience a wind shift from the __________. (D014NG )
Y a. southwest, clockwise to northwest N b. northeast, clockwise to west-southwest N c. northeast, counterclockwise to northwest N d. east, counterclockwise to south-southwest 1220: Under the U.S. Aids to Navigation System, a lighted buoy with a spherical topmark marks __________.
N a. the position of underwater cables N b. a hazard to navigation N c. the port side of the channel Y d. safe water 1277: The velocity and direction of the tidal current at Port Morris, NY, at 1135 DST (ZD +4) on 13 May 1983 will be __________.
Y a. negligible at 220°T N b. 3.1 knots at 045°T N c. 1.2 knots at 220°T N d. 1.0 knot at 045°T 1324: When daylight savings time is kept, the time of tide and current calculations must be adjusted. One way of doing this is to __________.
Y a. add one hour to the times listed under the reference stations N b. subtract one hour from the time differences listed for the subordinate stations N c. apply no correction as the times in the reference stations are adjusted for daylight savings time N d. add 15° to the standard meridian when calculating the time difference 1346: Cirrus clouds followed by cirrostratus then altostratus, stratus, and occasionally nimbostratus indicate the approach of a(n) __________.
N a. cold front Y b. warm front N c. tropical front N d. occluded front 1372: You are enroute to Jacksonville, FL, from San Juan, P.R. There is a fresh N'ly wind blowing. As you cross the axis of the Gulf Stream you would expect to encounter __________.
N a. cirrus clouds N b. long swells N c. smoother seas and warmer water Y d. steeper waves, closer together 1436: Fog forms when the air __________.
N a. is 50% water saturated N b. is 90% water saturated N c. temperature is greater than the dew point temperature Y d. temperature is equal to, or below the dew point temperature 1462: Altocumulus clouds are indicated by which number? (D039NG )
N a. 1 N b. 3 N c. 4 Y d. 5 1513: Scales on aneroid barometers are usually graduated in inches of mercury in the general range of __________.
N a. 26 to 29 inches Y b. 28 to 31 inches N c. 30 to 33 inches N d. 32 to 35 inches 1598: A slow, gradual fall of the barometer indicates approaching __________.
N a. gale force winds within 12 hours N b. blizzard conditions Y c. deteriorating or unsettled weather N d. heavy, wind driven rain 1731: When your vessel is on or near the path of an approaching tropical storm the __________.
N a. wind direction remains steady N b. wind speed increases N c. barometer falls Y d. All of the above 1820: Information on the operating times and characteristics of foreign radio beacons can be found in which publication?
Y a. List of Lights N b. Coast Pilot N c. Sailing Directions N d. List of Radio beacons 1829: The illustration represents a fixed C of E lock and dam. What navigational light(s) is(are) exhibited at the position indicated by the letter E in the illustration? (D036NG )
N a. One red light N b. Two green lights N c. Three green lights Y d. No light 1908: What is the brightest navigational planet?
N a. Saturn N b. Jupiter N c. Mars Y d. Venus 2060: What is the relative bearing of an object broad on the starboard quarter?
N a. 045° N b. 090° Y c. 135° N d. 225° 2081: 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. 30° N b. 45° N c. 60° Y d. 90° 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 2183: Diagram number D037NG 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?
N a. Three red lights N b. Two red lights Y c. One red light N d. No light 2242: A vessel is heading magnetic north and its magnetic compass indicates a heading of 356°. Which action should be taken to remove this error during compass adjustment?
Y a. If the red ends of the magnets are to port you should lower the athwartships tray. N b. If the red ends of the magnets are aft you should raise the fore-and-aft tray. N c. If the blue ends of the magnets are to port, and the athwartships tray is at the top, you should remove some of the magnets. N d. If the blue ends of the magnets are aft you should raise the fore-and-aft tray. 2414: You must construct a Mercator plotting sheet on a piece of paper measuring 20" by 28". The area includes latitude 38°S to 43°S and longitude 178°E to 175°W. Allow a one-half 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. 2.6 inches Y b. 2.9 inches N c. 3.2 inches N d. 3.5 inches 2480: You are on course 277°T and take a relative bearing of a lighthouse of 045°. What is the true bearing to the lighthouse?
N a. 038° N b. 232° N c. 315° Y d. 322° 2614: What is the equivalent of 4°36' in time units?
N a. 9 min. 12 sec. N b. 14 min. 36 sec. N c. 15 min. 36 sec. Y d. 18 min. 24 sec. 2656: What is the equivalent of 0 min. 16 sec. in arc units?
N a. 0°32' N b. 0°16' Y c. 0°04' N d. 0°01' 2684: The maximum difference between mean time and apparent time is __________.
N a. equal to the longitude expressed in time units Y b. about 16 minutes N c. the difference between the GHA of mean sun and the first point of Aries N d. 15° of arc 2687: The letter B in illustration D006NG represents the __________.
N a. celestial horizon N b. visible horizon N c. sensible horizon Y d. geoidal horizon 2796: The correction tables in the Nautical Almanac for use with Moon sights do NOT include the effects of __________.
Y a. instrument error N b. augmentation N c. semidiameter N d. parallax 2802: 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 effect of pulse length. Y b. The small island is not detected due to shadow effect of the mountain. N c. A target bearing of the headland to the south-southeast is corrected by adding one-half of the beam width. N d. Ship No. 2 is not detected due to the reflective mass of the mountain overpowering the ship's reflective signals. 2904: Your radar displays your ship off center. As you proceed on your course, your ship's marker moves on the PPI scope while echoes from land masses remain stationary. What is this display called?
N a. Off center Y b. True motion N c. Stabilized N d. Head up 2940: On the Corps of Engineer's Navigation Maps, the channel is __________.
N a. midway between the banks N b. indicated by depths (in feet) Y c. indicated by a broken line N d. not indicated 3078: Which data must ECDIS be able to record at one-minute intervals?
N a. Position N b. Electronic navigational chart source N c. Course made good history Y d. All of the above 3085: An ECDIS is required to display which information?
N a. Water temperature N b. Climatology data N c. Speed of advance Y d. Depth contours 3094: ECDIS must have the capability to preserve the record of the track for the previous __________.
Y a. 12 hours N b. 24 hours N c. 48 hours N d. 72 hours 3107: Automatic identification systems (AIS) are expected to broadcast all of the following information EXCEPT __________.
Y a. Port of origin N b. Name of vessel N c. Course and speed over ground N d. Draft of vessel 3107: Automatic identification systems (AIS) are expected to broadcast all of the following information EXCEPT __________.
Y a. Port of origin N b. Name of vessel N c. Course and speed over ground N d. Draft of vessel