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.
3: Blinking of a Loran-C signal indicates __________.
N a. the signal is in proper sequence N b. there will be no increase or decrease in kHz Y c. there is an error in the transmission of that signal N d. that it has the proper GRI 102: Which statement about an NGA (NIMA) chart with stock no.23BHA23433 is TRUE?
N a. This is a non-navigational or special purpose chart. N b. It is not included in the portfolio. Y c. It is a chart of an area in subregion 23. N d. It depicts a major portion of an ocean. 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 164: The part of a sextant mounted directly over the pivot of the index arm is the __________.
Y a. index mirror N b. horizon glass N c. micrometer drum N d. telescope 185: A ship is in longitude 54°00'W on a true course of 270°. The ship's clocks are on the proper time zone. At what longitude should the clocks be changed to maintain the proper zone time?
N a. 45°00'W N b. 52°30'W N c. 60°00'W Y d. 67°30'W 195: The equation of time is 8m 00s. The mean Sun is ahead of the apparent Sun. If you are 2°W of the central meridian of your time zone, when will the apparent Sun cross your meridian?
Y a. 1216 N b. 1208 N c. 1200 N d. 1152 208: The moon is full and at perigee on 20 January 1983. What is the maximum current you could expect at 2350 (ZD +5) at Nantucket Shoals?
N a. 0.5 knot N b. 0.7 knot N c. 0.8 knot Y d. 1.0 knot 210: The position labeled C is a(n) __________. (D051NG )
N a. fix Y b. running fix N c. estimated position N d. dead reckoning position 223: In the Loran-C configuration shown, the stations located at X, Y, and Z are called __________. (D003NG )
N a. repeater stations Y b. secondary stations N c. composite stations N d. alternate stations 230: If the LORAN-C ground wave does NOT extend out as far as the skywave skip distance, there will be a skip zone in which __________.
Y a. no LORAN-C signal is received N b. only ground waves are received N c. only skywaves are received N d. both ground waves and skywaves are received 255: On March 17, at 0500 zone time, you cross the 180th meridian steaming eastward to west longitude. What is your local time?
N a. You are in -12 time zone. N b. It is 1700, March 18. Y c. It is 0500, March 16. N d. It is 0500, March 18. 283: Loran-C operates on a single frequency centered on __________.
Y a. 100 kHz N b. 500 kHz N c. 1,850 kHz N d. 1,950 kHz 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 388: You are underway on course 120°T and your maximum speed is 12 knots. The eye of a hurricane bears 150°T, 120 miles from your position. The hurricane is moving towards 295°T at 20 knots. If you maneuver at 12 knots to avoid the hurricane, what could be the maximum CPA?
N a. 89 miles N b. 96 miles N c. 105 miles Y d. 117 miles 600: The dangerous semicircle of a typhoon in the Southern Hemisphere is that area __________.
N a. measured from due south clockwise 180° N b. measured from due south counterclockwise 180° Y c. to the left of the storm's track N d. ahead of the typhoon measured from the storm's track to 90° on each side 636: Tropical cyclones are classified by form and intensity. Which system does not have closed isobars?
N a. Hurricane Y b. Tropical disturbance N c. Tropical depression N d. Cyclone 692: Which publication should you check for complete information on Puget Sound weather conditions?
N a. Sailing Directions N b. Light List Y c. Coast Pilot N d. Chart of the area 793: The permanent magnetism of a vessel may change in strength due to __________.
N a. a collision with another vessel N b. being moored on a constant heading for a long period of time N c. being struck by lightning Y d. All of the above 821: In addition to monitoring channel 16, all Corps of Engineer locks may use as working channels __________.
N a. 06, 12 and 22A N b. 01A, 05A and 07A Y c. 12, 13 and 14 N d. 14, 24 and 28 824: An "atoll cloud" forming over an island due to heating of the land during the daytime would be which type?
N a. Cirrus Y b. Cumulus N c. Stratus N d. Nimbus 852: What is published by the U.S. Coast Guard?
Y a. Light List N b. Nautical Charts N c. Tide Tables N d. U.S. Coast Pilot 874: Altocumulus clouds are defined as __________.
N a. high clouds Y b. middle clouds N c. low clouds N d. vertical development clouds 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 1009: You are preparing a weather report form, WS Form B-80. The dry bulb thermometer reads 34°F, and the wet bulb thermometer reads 31°F. Using the ships code card, how would you encode the air temperature groups in the report? (D041NG )
N a. 10340, 2127/ N b. 10111, 2104/ Y c. 10011, 2104/ N d. 10340, 2031/ 1017: Which statement(s) concerning the effect of Coriolis force on ocean currents is(are) correct?
N a. The deflection of the current is to the left in the Northern Hemisphere. N b. The Coriolis force is greater in the lower latitudes. Y c. The Coriolis force is more effective in deep water. N d. All of the above 1026: An air mass that has moved down from Canada would most likely have the symbols __________.
N a. mPk Y b. cPk N c. cTk N d. cTw 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 1160: What will be the velocity of the tidal current at 0.2 mile SSW of Clason Point, NY, at 1125 on 17 April 1983?
N a. 0.5 knot N b. 0.8 knot Y c. 1.1 knots N d. 1.9 knots 1188: The magnitude of three stars is indicated. Which star is the brightest?
N a. Antares + 1.2 N b. Altair + 0.9 Y c. Vega + 0.1 N d. Cannot be determined; magnitude indicates size not brightness 1307: What will be the velocity of the tidal current southwest of Hunts Point, NY, at 0932 EST (ZD +5) on 16 March 1983?
N a. 0.9 knot Y b. 1.5 knots N c. 1.8 knots N d. 2.3 knots 1314: The Illustration shows the symbols used on radio facsimile weather charts. Which of these symbols indicates hail? (D042NG )
N a. N Y b. H N c. Q N d. F 1341: The height of a light is measured from which reference plane?
N a. Mean low water Y b. Mean high water N c. Average water level N d. Geographical sea level 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 1594: The Illustration shows the symbols used on radio facsimile weather charts. The symbol indicated at letter "P" represents __________. (D042NG )
N a. snow N b. hail Y c. freezing rain N d. sleet 1706: In the Northern Hemisphere a wind is said to veer when the wind __________.
Y a. changes direction clockwise, as from north to east, etc. N b. changes direction violently and erratically N c. remains constant in direction and speed N d. changes direction counterclockwise, as from south to east, etc. 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 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 1767: Which statement describes the prevailing wind direction in mid-winter in the Gulf Coast area?
Y a. 30% to 40% of mid-winter winds are from a northern quadrant. N b. 40% to 50% of mid-winter winds are from a southern quadrant. N c. the winds are variable in speed, but strongest in March. N d. None of the above 1886: What is the relative bearing of an object dead astern?
N a. 000° N b. 090° Y c. 180° N d. 270° 1907: Information about direction and velocity of rotary tidal currents is found in the __________.
N a. Tide Tables N b. Nautical Almanac Y c. Tidal Current Tables N d. Mariner's Guide 2024: In the North Sea area, you sight a buoy with a quick light showing 3 flashes every 10 seconds. Which topmark in illustration D030NG would be fitted to this buoy under the IALA Buoyage Systems? (D030NG )
N a. A N b. B N c. C Y d. D 2044: What is the relative bearing of an object broad on the port quarter?
N a. 195° Y b. 225° N c. 240° N d. 265° 2073: Chart legends printed in capital letters show that the associated landmark is __________.
N a. a radio transmitter N b. a government facility or station N c. inconspicuous Y d. conspicuous 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 2239: A flashing green light displayed at a single lock means that the lock is __________.
Y a. ready for entrance N b. ready for entrance, but gates cannot be closed completely N c. being made ready for entrance N d. not ready for entrance 2239: A flashing green light displayed at a single lock means that the lock is __________.
Y a. ready for entrance N b. ready for entrance, but gates cannot be closed completely N c. being made ready for entrance N d. not ready for entrance 2256: The constellation that contains Polaris is __________.
N a. Orion N b. Cassiopeia Y c. Ursa Minor N d. Corona Borealis 2277: The Light List indicates that a light has a nominal range of 20 miles and is 52 feet high. If the visibility is 12.0 miles and your height of eye is 20 feet, at what approximate distance will you sight the light?
N a. 21.5 miles N b. 20.0 miles Y c. 13.7 miles N d. 12.0 miles 2277: The Light List indicates that a light has a nominal range of 20 miles and is 52 feet high. If the visibility is 12.0 miles and your height of eye is 20 feet, at what approximate distance will you sight the light?
N a. 21.5 miles N b. 20.0 miles Y c. 13.7 miles N d. 12.0 miles 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 2346: The first point of Aries is the point where the Sun is at __________.
N a. maximum declination north N b. maximum declination south Y c. 0° declination going to northerly declinations N d. 0° declination going to southerly declinations 2375: The shortest distance between any two points on earth defines a __________.
N a. small circle Y b. great circle N c. rhumb line N d. hyperbola 2384: On U.S. charts, you can tell if a named feature such as a rock (i.e. Great Eastern Rock in Block Island Sound) is submerged by the __________.
N a. color of ink used to print the name Y b. style of type used to print the name N c. dashed circle around the feature N d. magenta circle around the feature 2586: A chart has extensive corrections to be made to it. When these are made and the chart is again printed, the chart issue is a __________.
N a. first edition Y b. new edition N c. revised edition N d. reprint 2639: Under the U.S. Aids to Navigation System used on the Western Rivers, aids to navigation lights on the right descending bank show __________.
Y a. white or green lights N b. white or red lights N c. green lights only N d. white lights only 2803: Some locations maintain a zone time of -13. What are the Greenwich time and date if the zone time and date are 0152, 10 January?
Y a. 1252, 9 January N b. 1452, 9 January N c. 0052, 11 January N d. 1452, 11 January 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 2936: Information on search and rescue procedures and special, local communications used in Mexican waters will be found in the __________.
N a. World Port Index N b. International Code of Signals (Pub 102) Y c. Sailing Directions (Planning Guides) N d. International Aeronautical and Maritime Search and Rescue Manual 3056: A position obtained by applying ONLY your vessel's course and speed to a known position is a __________.
N a. fix Y b. dead-reckoning position N c. running fix N d. probable position 3108: Automatic identification systems (AIS) are expected to broadcast all of the following information EXCEPT __________.
N a. navigation status N b. ship's heading Y c. port of origin N d. time stamp