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.
2: On an isomagnetic chart, the line of zero variation is the __________.
N a. zero variation line N b. isogonic line N c. variation line Y d. agonic line 2: On an isomagnetic chart, the line of zero variation is the __________.
N a. zero variation line N b. isogonic line N c. variation line Y d. agonic line 320: Sometimes foreign charts are reproduced by NGA (NIMA). On such a chart, a wire-dragged, swept area may be shown in green or __________.
N a. red N b. black Y c. purple N d. yellow 337: To predict the actual depth of water using the Tide Tables, the number obtained from the Tide Tables is __________.
N a. the actual depth Y b. added to or subtracted from the charted depth N c. multiplied by the charted depth N d. divided by the charted depth 547: On 2 November 1983, at 1630 EST (ZD +5), what will be the predicted height of tide at Fulton, FL?
Y a. 2.8 feet (0.8 meters) N b. 3.4 feet (1.0 meters) N c. 4.2 feet (1.3 meters) N d. 5.6 feet (1.7 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' 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 630: What kind of weather would you expect to accompany the passage of a tropical wave?
Y a. Heavy rain and cloudiness N b. Good weather N c. A tropical storm N d. Dense fog 663: You are underway at 10 knots. At 1800 you note a radar contact dead ahead at a range of 10 miles. At 1812 the contact is dead ahead at a range of 8 miles. The estimated speed of the contact is __________.
Y a. dead in the water N b. 5 knots N c. 10 knots N d. 15 knots 686: The pressure gradient between the horse latitudes and doldrums runs __________.
N a. east to west Y b. north to south N c. northeast to southwest N d. northwest to southeast 689: What is the index error of sextant C? (D050NG )
Y a. 0'20" on the arc N b. 1'00" on the arc N c. 2'00" on the arc N d. 5'10" on the arc 747: The movement of water away from the shore or downstream is called a(n) __________.
N a. reversing current Y b. ebb current N c. flood current N d. slack current 890: If several navigational lights are visible at the same time, each one may be positively identified by checking all of the following EXCEPT what against the Light List?
N a. Rhythm N b. Period Y c. Intensity N d. Color 896: The wind direction around a low pressure area in the Northern Hemisphere is __________.
N a. clockwise and inward N b. clockwise and outward Y c. counterclockwise and inward N d. counterclockwise and outward 914: If the sky was clear, with the exception of a few cumulus clouds, it would indicate __________.
N a. rain N b. hurricane weather Y c. fair weather N d. fog setting in 985: A time diagram is a diagram on the plane of the __________.
N a. celestial meridian Y b. celestial equator N c. celestial horizon N d. principal vertical circle 993: When crossing the magnetic equator the __________.
N a. Flinders bar should be inverted Y b. heeling magnet should be inverted N c. the quadrantal spheres should be rotated 180° N d. Flinders bar should be moved to the opposite side of the binnacle 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 1049: At 0000 you fix your position and change course to 270°T. At 0030 you again fix your position, and it is 0.5 mile east of your DR. Which statement is TRUE?
N a. The set is 090°, drift 0.5 knot. Y b. The set is 090°, drift 1.0 knot. N c. The set is 270°, drift 0.5 knot. N d. The set is 270°, drift 1.0 knot. 1116: When a cold air mass and a warm air mass meet, and there is no horizontal motion of either air mass, it is called a(n) __________.
N a. cold front N b. occluded front Y c. stationary front N d. warm front 1123: What are the only magnetic compass correctors that correct for both permanent and induced effects of magnetism?
N a. Quadrantal spheres Y b. Heeling magnets N c. Athwartships magnets N d. Fore-and-aft magnets 1132: On charts of U.S. waters, a magenta marking is NOT used for marking a __________.
N a. radio beacon Y b. 5-fathom curve N c. prohibited area N d. lighted buoy 1140: What is the light characteristic of a lighted, preferred-channel buoy?
N a. Group flashing Y b. Composite group flashing N c. Interrupted quick flashing N d. Fixed and flashing 1176: After a cold front passes, the barometric pressure __________.
N a. drops, and the temperature drops N b. drops, and the temperature rises Y c. rises, and the temperature drops N d. rises, and the temperature rises 1210: You are inbound in a channel marked by a range. The range line is 309°T. You are steering 306°T and have the range in sight as shown. The range continues to open. What action should you take? (D047NG )
N a. Alter course to the right to 309°T or more to bring the range in line. N b. Maintain course as it is normal for the range to open as you get close. Y c. Alter course to the left until the range closes, then steer to the left of 306°T. N d. Alter course to the left to close the range, then alter course to 309°T. 1281: The time required for a lighted aid to complete a full cycle of light changes is listed in the Light List as the __________.
N a. set N b. frequency Y c. period N d. function 1311: What is the characteristic of a quick light?
N a. Shows groups of 2 or more flashes at regular intervals N b. Durations of light and darkness are equal Y c. Shows not less than 60 flashes per minute N d. Shows quick flashes for about 5 seconds followed by a 1 second dark period 1315: What is a lighted safe water mark fitted with to aid in its identification?
N a. Red and white retroreflective material N b. A sequential number Y c. A spherical topmark N d. A red and white octagon 1319: The Sailing Directions (Planning Guide) contain information on all of the following EXCEPT __________.
Y a. coastal features N b. ocean basin environment N c. ocean routes N d. military operating areas 1365: The same side of the Moon is always toward the Earth, but more than half of its surface has been seen due to libration. Libration in latitude occurs because __________.
Y a. the axis of rotation is tilted about 6.5° to the axis of revolution N b. the speed of revolution varies, while the rotational speed is essentially constant N c. of the rotational oscillation of the Moon with respect to its radius vector N d. of augmentation 1379: The lubber's line on a magnetic compass indicates __________.
N a. compass north Y b. the direction of the vessel's head N c. magnetic north N d. a relative bearing taken with an azimuth circle 1414: You are planning a voyage from New York to Norway via the English Channel. Which publication contains information on the dangers to navigation in the English Channel?
N a. Channel Pilot's Guide N b. World Port Index N c. Coast Pilot Y d. Sailing Directions (Enroute) 1440: A mercurial barometer at sea is subject to rapid variations in height ("pumping") due to the pitch and roll of the vessel. To avoid this error, measurements of atmospheric pressure at sea are usually measured with a(n) __________.
N a. syphon barometer N b. cistern barometer Y c. aneroid barometer N d. fortin barometer 1468: What is NOT an advantage of the rhumb line track over a great circle track?
N a. Easily plotted on a Mercator chart N b. Negligible increase in distance on east-west courses near the equator N c. Does not require constant course changes Y d. Plots as a straight line on Lambert conformal charts 1523: Which is a characteristic of the weather preceding an approaching warm front?
N a. Gusty winds Y b. Steadily falling barometric pressure N c. Decreasing relative humidity N d. Clearing skies 1635: An isotherm is __________.
N a. a line on a weather map connecting equal points of both temperature and pressure N b. an instrument that measures the climatological effects of temperature N c. a line connecting points of equal barometric pressure on a weather map Y d. a line connecting points of equal temperature on a weather map 1702: In a cyclone the lowest pressure is found in the __________.
Y a. center N b. outer edge N c. warm front N d. cold front 1715: The hurricane season generally occurs from __________.
N a. August to January N b. July to December Y c. June to November N d. January to June 1745: When your vessel is on the storm track but behind the storm's center the __________.
N a. wind direction remains steady N b. wind speed decreases N c. barometer rises Y d. All of the above 1764: What natural feature is responsible for the rather even climate found on the Florida peninsula throughout the year?
N a. Strong masses of continental air Y b. The Gulf Stream N c. The Bermuda high N d. The cool waters of the Sargasso sea 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 1811: To find a magnetic compass course from a true course you must apply __________.
N a. deviation Y b. deviation and variation N c. variation N d. magnetic anomalies (local disturbances) 1882: The GP of a body for a high altitude sight is determined from the Greenwich hour angle and the __________.
N a. circle of equal altitude N b. zenith distance N c. azimuth angle Y d. declination 2021: While on watch, you notice that the air temperature is dropping and is approaching the dew point. Which type of weather should be forecasted?
N a. Hail N b. Heavy rain N c. Sleet Y d. Fog 2082: You are holding position above Gallipolis Lock and Dam when you hear two long blasts of the horn from the lock. This indicates that you should __________.
Y a. enter the riverward lock N b. hold position until two more upbound tows have locked through N c. enter the landward lock N d. hold position until the lower gates are closed 2092: Descending boats, while awaiting their turn to enter a lock, shall NOT block traffic from the lock. They shall be above the lock by at LEAST __________.
N a. 100 feet N b. 200 feet N c. 300 feet Y d. 400 feet 2132: What is the definition of height of tide?
N a. The vertical difference between the heights of low and high water N b. The vertical difference between a datum plane and the ocean bottom Y c. The vertical distance from the tidal datum to the level of the water at any time N d. The vertical distance from the surface of the water to the ocean floor 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 2336: The period of revolution of the Moon is __________.
N a. 24 hours Y b. about 27.3 days N c. 365 days N d. about 19 years 2444: What is the equivalent of 0°48' in time units?
N a. 2 min. 12 sec. N b. 2 min. 42 sec. N c. 3 min. 02 sec. Y d. 3 min. 12 sec. 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 2619: In low latitudes, a first quarter Moon will always rise at about __________.
N a. sunrise Y b. 1200 LMT N c. sunset N d. 2400 LMT 2695: 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?
N a. The drift should be added to the ship's speed. N b. The current should be ignored. Y c. The course and speed made good should be determined and used to advance the LOP. N d. The set should be applied to the second bearing. 2778: A special daymark is a __________.
N a. red-and-white octagon N b. daymark with a yellow stripe on it N c. green square Y d. yellow diamond 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 2991: When using a radar in an unstabilized mode, fixes are determined most easily from __________.
N a. objects that are close aboard Y b. ranges N c. tangent bearings N d. center bearings 3076: An ECDIS is required to display which information?
N a. Radar targets N b. ARPA vectors Y c. Hydrographic data N d. All of the above 3089: As a licensed Merchant Marine Officer you are expected to __________.
N a. obtain a weather forecast before setting out from port N b. listen to weather forecasts on the radio while enroute N c. understand all broadcast weather warning information Y d. All of the above 3091: Which of the following must an ECDIS system be able to perform?
N a. Conversion of "graphical coordinates" to "display coordinates" N b. Transformation of local datum to WGS-'84 datum N c. Calculation of true azimuth and distance between two geographical points Y d. All of the above 3103: In general, on how many radio channels will an automatic identification system (AIS) operate?
N a. 1 Y b. 3 N c. 4 N d. 12