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.
48: When should a navigator rely on the position of floating aids to navigation?
N a. During calm weather only N b. During daylight only N c. Only when inside a harbor Y d. Only when fixed aids are not available 252: A large automated navigational buoy, such as those that have replaced some lightships, would be shown on a chart by which symbol? (D015NG )
N a. A Y b. B N c. C N d. D 293: The use of pulse groups and extremely precise timing at each Loran-C station makes possible the use of __________.
N a. high frequency pulses N b. combinations of high and low frequency pulses Y c. the same frequency for all stations in a chain N d. varied long and short pulses 302: Which symbol represents a 20-fathom curve?
Y a. -..-..-..-..- N b. - - - - - - - - N c. - - . - - . - - . - - . N d. - - - - - - - - 341: Buoys which only mark the left or right side of the channel will never exhibit a light with which characteristic?
N a. Flashing N b. Quick flashing Y c. Composite group flashing N d. Equal interval (isophase) 410: The height of the tide at low water is 0.0 feet. The range is 9.0 feet. The duration is 06h 00m. The height of the tide 02h 12m before high water will be __________.
N a. 8.3 feet Y b. 6.3 feet N c. 4.7 feet N d. 2.7 feet 476: Tropical cyclones normally form within which of the following belts of latitude?
Y a. 5° to 15° N b. 15° to 30° N c. 30° to 45° N d. 45° to 60° 504: Barometer readings in weather reports are given in terms of pressure at __________.
Y a. sea level N b. Washington, D.C. N c. the weather station N d. the broadcasting station 527: On 6 June 1983, at 1719 EST (ZD +5), what will be the predicted height of tide at Chester, PA?
N a. 0.8 feet( 0.2 meters) Y b. 1.1 feet (0.3 meters) N c. 3.5 feet (1.1 meters) N d. 4.7 feet (1.4 meters) 722: Which publication would describe the explosive anchorages in the ports on the east coast of the United States?
N a. Sailing Directions N b. Pilot Rules for Inland Waters Y c. Coast Pilot N d. Notice to Mariners 829: 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 set should be applied to the second bearing. N c. The current should be ignored. Y d. The course and speed made good should be determined and used to advance the LOP. 864: Uniform, grayish-white cloud sheets that cover large portions of the sky, and are responsible for a large percentage of the precipitation in the temperate latitudes, are called __________.
Y a. altostratus N b. altocumulus N c. cirrostratus N d. cirrocumulus 937: The north equatorial current flows to the __________.
N a. east N b. northeast N c. southwest Y d. west 942: Light Lists for coastal waters are __________.
N a. published every year and require no corrections N b. published every second year and must be corrected N c. published every five years and require no correction Y d. accurate thru NM number on title page and must be corrected 1069: What do the numbers on isobars indicate?
Y a. barometric pressure N b. temperature N c. rain in inches N d. wind speed 1083: Magnets are placed in horizontal trays in the compass binnacle to compensate for the __________.
N a. induced magnetism in the vessel's horizontal soft iron N b. change in the magnetic field when the vessel inclines from vertical Y c. permanent magnetism of the vessel N d. magnetic fields caused by electrical currents in the vicinity 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 1145: The GHA of a star __________.
Y a. increases at a rate of approximately 15° per hour N b. increases at a rate of approximately 4° per hour N c. decreases at a rate of approximately 15° per hour N d. decreases at a rate of approximately 4° per hour 1199: The Sailing Directions (Enroute) contain information on __________.
N a. well-charted inner dangers N b. port facilities Y c. coastal anchorages N d. offshore traffic separation schemes 1231: Some lights used as aids to marine navigation have a red sector to indicate a danger area. How are the limits of a colored sector of light listed in the Light List?
N a. Geographical positions outlining the area of the sector N b. True bearings as observed from the light toward a vessel Y c. True bearings as observed from a vessel toward the light N d. Bearings given in the Light List are always magnetic 1237: What will be the velocity of the tidal current at Port Royal, VA, at 1505 DST (ZD +4) on 4 June 1983?
N a. 0.0 knot N b. 0.1 knot Y c. 0.4 knot N d. 0.7 knot 1260: On 26 February 1983, at 1750 EST (ZD +5) what will be the predicted height of tide at New Haven (city dock), CT?
N a. -.3 foot (-0.1 meter) Y b. -.6 foot (-0.2 meter) N c. 1.3 feet (0.4 meter) N d. 1.6 feet (0.5 meter) 1306: What type of clouds are associated with a cold front?
N a. Altostratus and fracto-cumulus N b. Altostratus and cirrus N c. Cirrus and cirrostratus Y d. Cumulus and cumulonimbus 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 1430: The Light List indicates that a light has a nominal range of 14 miles and is 42 feet high (12.8 meters). If the visibility is 6 miles and your height of eye is 20 feet (6.1 meters), at what approximate distance will you sight the light?
N a. 20.1 miles Y b. 10.0 miles N c. 7.6 miles N d. 6.0 miles 1597: The dense black cumulonimbus clouds surrounding the eye of a hurricane are called __________.
N a. spiral rainbands Y b. cloud walls N c. funnel clouds N d. cyclonic spirals 1601: Sextant B in illustration D043NG reads __________. (D043NG )
N a. 30°51.0' Y b. 30°42.5' N c. 30°47.5' N d. 31°00.0' 1633: To find a magnetic compass course from a true course you must apply __________.
Y a. deviation and variation N b. deviation N c. variation N d. magnetic anomalies (local disturbances) 1652: Small, visible mound-like protuberances on the bottom of cumulonimbus clouds, that are potential breeding grounds for waterspouts and tornadoes, are called __________.
N a. thunderheads Y b. mamma N c. rime N d. ice prisms 1656: Which instrument is most useful in forecasting fog?
N a. A barometer N b. An anemometer Y c. A sling psychrometer N d. A pyrometer 1683: As it approaches, a typical warm front will bring __________.
Y a. rising temperatures and falling barometric pressure N b. falling temperature and pressure N c. falling temperatures and rising pressure N d. rising barometric pressure and temperatures 1743: In the Northern Hemisphere, if your vessel is in a hurricane's navigable semicircle it should be positioned with the wind on the __________.
Y a. starboard quarter, hold course and make as much speed as possible N b. port bow, hold course and make as much speed as possible until the hurricane has passed N c. port quarter, maintain course and make as much speed as possible N d. starboard bow and heave to until the hurricane has passed 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 1805: A phenomenon where the atmospheric pressure is higher than that of other surrounding regions is called __________.
N a. the "trade winds" N b. a low front or an occluded front N c. the doldrums Y d. a "high" 1815: Which weather system produces strong cold winds called "Northers" during the winter months in the Gulf of Mexico?
Y a. An anticyclone N b. A polar maritime air mass N c. A cyclone N d. A low pressure system 1832: Which magnetic compass corrector(s) can be set while the vessel is on a heading of magnetic northeast or magnetic southeast?
N a. Flinders bar N b. Heeling magnets N c. Fore-and-aft magnets Y d. Quadrantal spheres 1924: The point on the celestial sphere that is directly below an observer is the __________.
N a. pole Y b. nadir N c. node N d. zenith 2019: At evening stars, the last stars that should be observed are those with an azimuth in what quadrant?
N a. Southern Y b. Western N c. Northern N d. Eastern 2199: Denebola is found in what constellation?
N a. Hydrus Y b. Leo N c. Centaurus N d. Aquila 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 2363: As shown, the position labeled C was plotted because __________. (D051NG )
N a. the vessel's speed changed N b. the vessel's course changed form due North to due East Y c. running fixes are better estimates of true position than dead-reckoning positions N d. All of the above are correct 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. 2448: What is the equivalent of 37 min. 32 sec. in arc units?
N a. 4°47' N b. 6°38' N c. 7°41' Y d. 9°23' 2448: What is the equivalent of 37 min. 32 sec. in arc units?
N a. 4°47' N b. 6°38' N c. 7°41' Y d. 9°23' 2578: You must draw a plotting sheet covering latitudes 49°N to 53°N and longitudes 179°E to 178°W. If the distance between latitude 49°N to 53°N is 16 inches, what is the distance between the meridians of 1° of longitude?
N a. 2.12 inches N b. 2.33 inches Y c. 2.56 inches N d. 2.81 inches 2598: A vessel is proceeding downstream in a narrow channel on the Western Rivers when another vessel is sighted moving upstream. Which vessel has the right of way?
N a. The vessel moving upstream against the current Y b. The vessel moving downstream with a following current N c. The vessel located more towards the channel centerline N d. The vessel with the least amount of maneuverability 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 2648: The 3-cm radar as compared to a 10-cm radar with similar specifications will __________.
N a. give better range performance in rain, hail, etc. N b. display small targets in a mass of dense sea clutter at a greater range N c. have less sea return in choppy rough seas Y d. display a more maplike presentation for inshore navigation 2741: A general chart could have a scale of __________.
Y a. 1:200,000 N b. 1:1,000,000 N c. 1:50,000 N d. not more than 1:25,000 2821: The height of tide is the __________.
N a. difference between the depth of the water at high tide and the depth of the water at low tide N b. depth of water at a specific time due to tidal effect Y c. difference between the depth of the water and the area's tidal datum N d. difference between the depth of the water and the high water tidal level 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 2914: A daymark with red and green bands, with red uppermost, will have the shape indicated by which letter in illustration D045NG?
N a. A N b. B N c. C Y d. D 2920: Navigation charts of the Upper Mississippi River are published by __________.
N a. National Ocean Service N b. Lake Survey Y c. Corps of Engineers, U.S. Army N d. U.S. Coast Guard 2931: The vertical distance from the tidal datum to the level of the water is the __________.
N a. range of tide Y b. height of tide N c. actual water depth N d. charted depth 2941: During daylight savings time the meridian used for determining the time is located farther __________.
N a. west in west longitude and east in east longitude N b. east in west longitude and west in east longitude Y c. east N d. west 3028: The channel under a bridge is marked with aids from the lateral system. The centerline of the channel is marked on the bridge with __________.
N a. a yellow triangle N b. three white lights N c. a black-and-white diamond Y d. a red-and-white octagon 3069: The database resulting from (1) the transformation of the electronic navigational chart (ENC) by ECDIS for appropriate use, (2) the updates to the ENC by appropriate means, and (3) the additional data added by the mariner, is called the __________.
N a. display base information N b. standard display information Y c. system electronic navigational chart N d. chart display information 3072: ECDIS must give an alarm for which of the following cases?
N a. When the specified limit for deviation from the planned route is exceeded N b. If the ship, within a specified time set by the watch officer, is going to cross a safety contour N c. If the ship, within a specified time set by the watch officer, is going to cross the boundary of a prohibited area Y d. All of the above 3111: Which information must automatic identification systems (AIS) automatically provide to appropriately equipped shore stations, vessels and aircraft?
N a. Vessel's type N b. Vessel's course N c. Navigational status Y d. All of the above 3121: The short text messaging feature of the automatic identification system (AIS) allows for messages of up to___.
N a. 64 characters N b. 96 characters Y c. 158 characters N d. 256 characters