CÂU HỎI TRẮC NGHIỆM CHUYÊN MÔN CHO SỸ QUAN QUẢN LÝ 5

F1- NAVIGATION Generation or production of cyclones A frontal depression B frontogenesis C frontolysis D cyclogenesis Water vapor over the plane ice surface is less than that plane water surface because A plane ice surface is cooler than plane water surface B water vapor is directly proportional with the temperature of the air C water vapor is proportional with the temperature of the air D the molecules are more tightly bound in the solid state During poor visibility, a watch keeping officer is given fullest responsibility to utilize all available resources on the bridge, with respect to additional look-outs, does it mean the extra look-out should perform _ A stand on the bridge wing with binoculars, come rain or snow B report to Master any misbehavior on the bridge C radar monitoring D officer's personal and official messenger The type of clouds which is formed by a very extensive of two masses of air from middle latitudes and from higher and colder latitudes, associated with front A Cumulus-Nimbus B Frontal Cloud C Orographic Cloud D Cumulus Buy's Ballot Law which states "If you stand with your back to the wind in the northern hemisphere, higher pressure will be on the right hand and lower pressure on the left, the reverse is true in the southern hemisphere" This law is evolved by a A German B Dutchman C French D English The most convenient method of maintaining record of ship's magnetic compass deviation is the annual adjustment of this particular reference, otherwise known as _ A deviation daily observation record B deviation card C magnetic chart D compensation card This is a very valuable publications in determining physical characteristics of the weather and other meteorological knowledge, as published by the Hydrographic Department of the Ministry of Defense of U.K A Almanac B The Mariner’s Handbook C Sight Reduction Tables D Pilot Chart Hard iron is very hard to magnetized, but once magnetized, it retains its poles more or less permanently Magnetism in hard iron is termed A permanent magnetism B induced magnetism C increased magnetism D reduced magnetism This physical element has most considerable effect in the weather A none of these B oxygen C nitrogen D water vapor 10 A unit measuring the strength of a magnetic field is called A gauss B degauss C sauger D srauss 11 To indicate a compass adjustment in progress, which international code signal is hoisted? A Oscar Quebec B Mike Sierra C Oscar Mike D Charlie Alpha 12 The following are positive signs of open water in ice concentration EXCEPT: A water sky indicates the direction of leads or patches of open water B the sound of surge in the ice indicates large expanse of open water C refractions producing luminous and yellow haze on the horizon D dark spots in fog visible at short distance relative to the reflections of the clouds 13 A radio navigation system which operates in a very low frequency is called: A Loran C B Loran A C RDF D Omega 14 If you want to know the coordinates of a certain port, the best publication to provide fastest reference is the A coast pilot B sailing directions C world port index D notice to mariners 15 The pressure of the atmosphere fall off with increasing height above the Earth's surface, because _ A density decreases with temperature and temperature decreases with height B earth's gravitational force sustains air by escaping C density increases with temperature and temperature increases with height D since the pressure of the atmosphere is due to the weight of the column of air overhead as one ascends, leaving some of the column of air below 16 The official document where all pertinent entries are recorded every hour and whenever an even or unusual incident occurs is _ A Ship's Official Log Book B ISM Checklist C Master's Night Order D None of these 17 The term used to denote a body being revolved to by its satellites A secondary B tertiary C territoriality D primary 18 What is the angle at the observer between the magnetic north measured clockwise, to the direction of the object being measured? A None of these B True course of bearing C Magnetic course or bearing D Compass course or bearing 19 When you are steering on a pair of range lights and find the upper light is above the lower light you should A come left B come right C continue on the present course D wait until the lights are no longer in a vertical line 20 Most modern Loran-C receivers, when not tracking properly, have a (n) _ A bell alarm to warn the user B lighted alarm signals to warn the user C alternative signal keying system D view finder for each station 21 You have replaced the chart paper in the course recorder What is Not required to ensure that a correct trace is recorded? A Test the electrical gain to the thermograph pens B Set the zone pen on the correct quadrant C Line the course pen up on the exact heading of the ship D Adjust the chart paper to indicate the correct time 22 Which buoy is Not numbered? A Green can buoy B Preferred channel buoy C Red lighted buoy D Green gong buoy 23 If Loran-C signals become unsynchronized, the receiver operator is warned because; A signals begin to blink B signals begin to shift C stations discontinue transmission D stations transmit grass 24 When the gyro pilot is used for steering, what control is adjusted to compensate for varying sea conditions? A Rudder control B Sea control C Lost motion adjustment D Weather adjustment 25 When using a buoy as aid to navigation, which of the following should be considered? A The buoy should be considered to always be in the charted location B If the light is flashing, the buoy should be considered to be in the charted location C The buoy may not be in the charted position D The buoy should be considered to be in the charted position if it has been flashing 26 When taking an amplitude, the Sun's center should be observed on the visible horizon when A in high latitudes B the Sun is near or at a solstice C the declination is of a different name from the latitude D the Sun's declination is at or near 0º 27 A strong, often violent, northerly wind occurring on the Pacific coast of Mexico particularly during the colder months is a A papagayo B fall wind C foehn D williwaw 28 A buoy with composite group flashing light indicates a (n) A anchorage area B fish net area C bifurcation D dredging area 29 The speed of the sound through ocean water is nearly always _ A faster than the speed of calibration for the fathometer B the same speed as the speed of calibration for the fathometer C slower than the speed of calibration for the fathometer D faster than the speed of calibration for the fathometer, unless the water is very warm 30 Red lights may appear on _ A horizontally banded buoys B vertically stripped buoys C yellow buoys D spherical buoys 31 Mean lower low water is the reference plane used for _ A all vertical measurements B heights above water for lights, mountains, etc C sounding on the U.S east and west coasts D water depths on the U.S east coast only 32 The LMT of LAN is 1210 Your longitude is 70º 30' E Which time would you use to enter the Nautical Almanac to determine the declination of the Sun at LAN? A 1842 B 1652 C 0728 D 0652 33 The parallax angle will vary the most with the time of year _ A Venus B Jupiter C Saturn D Polaris 34 A preferred channel buoy may be _ A lettered B spherical C showing a white light D all of the above 35 When operated over a muddy bottom, fathometer may indicate _ A a shallow depth reading B a zero depth reading C no depth reading D two depth readings 36 When there are small differences between the heights of two successive high tides or low tides in a tidal day, the tides are called A diurnal B semi-diurnal C solar D mixed 37 A single line of position combined with a dead-reckoning position results in a(n) _ A assumed position B estimated position C fix D running fix 38 Which position includes the effects of wind and current? A Dead reckoning position B Leeway position C Estimated position D Set position 39 What should you apply to a fathometer reading to determine the depth of water? A Subtract the draft of the vessel B Add the draft of the water C Subtract the seawater correction D Add the sea water correction 40 Green lights may appear on _ A horizontally banded buoys B vertically striped buoys C yellow buoys D spherical buoys 41 An electronic depth finder operates on the principle that _ A radio signals reflect from a solid surface B sound waves travels at a constant speed through water C radar signals travel at a constant speed through water D pressure increased with depth 42 In working out in local apparent noon sight for your latitude, you subtract the Ho from 90º The 90º represent the angular distance from _ A the equator to the elevated pole B your horizon to your zenith C your zenith to the elevated pole D the geographical position of the Sun to the elevated pole 43 The value of sixty nautical miles per degree of geodetic latitude is most correct at A the equator B latitude 45º C the poles D all latitudes 44 Under the Iala- A Buoyage System, a buoy used as a port hand mark would not show which light characteristic? A Isophase B Quick flashing C Long flashing D Group flashing (2 + ) 45 In modern fathometers the sonic or ultrasonic sound waves are produced electrically by means of a (a) _ A transmitter B transducer C transceiver D amplifier 46 Which statement is True concerning equatorial tides? A This occur when the Sun is at minimum declination north or south B This occur when the Moon is at maximum declination north or south C The difference between consecutive high or low tides is at a minimum D They are used as the basis for the vulgar establishment of the port 47 Which has the greatest effect on the amount of gain required to obtain a fathometer reading? A Salinity of water B Temperature of water C Atmospheric pressure D Type of bottom 48 The velocity of the current in large coastal harbors is _ A predicted in Tidal Current Tables B unpredictable C generally constant D generally too weak to be of concern 49 The apparent wind can be zero when the true wind is from _ A ahead and equal to the ship's speed B astern and equal to the ships speed C ahead and equal to twice the ship's speed D astern and equal to twice the ship's speed 50 The part of sextant mounted directly over the pivot of the index arm is the _ A index mirror B horizon glass C micrometer drum D telescope 51 You are steering a southerly course, and you note that the chart predicts an easterly current Without considering wind, how may you allow for the set? A Head your vessel slightly to the right B Head your vessel slightly to the left C Decrease your speed D Increase your speed 52 The scale on a chart is given as 1: 5,000,000 This means that _ A inch is equal to 5,000 inches on the Earth's surface B nautical mile on the chart is equal to 5,000 inches on the Earth's surface C inch is equal to 5,000,000 inches on the Earth's surface D nautical mile on the chart is equal to 5,000,000 inches on the Earth's surface 53 The horizon glass of a sextant is A silvered on its half nearer the frame B mounted on the index arm C between the horizon and the shade glasses D all of the above 54 Chart legend printed in capital letters show that the associated landmark is _ A conspicuous B inconspicuous C a government facility or station D a radio transmitter 55 When navigating using GPS, what is an indicator of the geometry of the satellites that your receiver is locked onto? A Horizontal Dilution of Precision B Selective Availability C Doppler Shifting D Precision Coding 56 When using GPS, how many position lines are required for a 2D (dimensional) fix? A B C D 57 When the question of time is taken from the Nautical Almanac for use in celestial navigation, it is used to determine A zone time B sunrise C time of local apparent noon D local mean time 58 The National Ocean Service publishes the A Light Lists B Coast Pilot C Pilot Charts D Sailing Directions 59 When using a radar in un-stabilized mode, fixes are determined most easily from _ A center bearings B tangent bearings C ranges D objects that are closed aboard 60 The difference (measured in degrees) between the GHA of the body and the longitude of the observer is the _ A right ascension B meridian angle C SHA of the observer D zenith distance 61 Vessels required to have an Automatic Radar Plotting Aid must have a device to indicate the _ A distance to the next port B speed of the vessel over the ground or through the water C time of the next navigational satellite pass D none of the above 62 When daylight savings time is kept the times of tide and current calculation must be adjusted One way of doing this is to _ A subtract one hour from the times listed under the reference stations B add one hour from the times listed under the reference stations C apply no corrections, as the times in the reference stations are adjusted for daylight savings time D add 15° to the starboard meridian when calculating the time difference 63 When making landfall at night, the light from the powerful lighthouse may sometimes be seen before the lantern breaks the horizon This light is called _ A diffusion B backscatter C loom D elevation 64 Prior to reading an aneroid barometer, you should tap the face lightly with your finger to _ A expose any loose connections B demagnetized the metal elements C bring pointer to its true position D contract and expand the glass face 65 What is an advantage of the magnetic compass aboard vessel? A Compass error is negligible at or near the earth's magnetic pole B It does not have to be checked as often C It is reliable due to its essential simplicity D All points on the compass rose are readily visible 66 You are using radar in which your own ship is shown at the center, and the heading flash always points at 0° If bearings are measured in relation to the flash, what type of bearings are produced? A Relative B True C Compass D Magnetic 67 What is True concerning an anemometer on a moving vessel? A It measures true wind speed B It measures true wind speed and true wind direction C It measures apparent wind speed D It measures apparent wind speed and true wind direction 68 The tropical year differs from which year by 20 minutes? A Astronomical year B Natural year C Equinoctial year D Sidereal year 69 The arc of great circle, which passes through the body and celestial poles is part of the _ A hour circle B diurnal circle C observer's meridian D altitude circle 70 The chart of a beach area shows a very steep slope to the underwater beach bottom Which breakers can be expected when trying to land a boat on this beach? A Surging B Converging C Spilling D Plunging 71 Low pressure disturbances, which travel along the inter-tropical convergence zone are called _ A permanent waves B tidal waves C tropical waves D tropical storms 72 Barometers are calibrated at a standard temperature of _ A 0° F B 32° F C 60º F D 70° F 73 In which voyage, between two points, is the rhumbline distance Not approximately the same as the great circle distance? A The two points are in low latitudes in the same hemisphere B The two points are in high latitudes in the same hemisphere C The two points is near the equator, but in different hemisphere D One point is near the equator, one point is in a high latitude and both are near the 180th meridian 74 Which statement is True concerning Mercator projection? A Degrees of longitude decrease in length as latitude increases B The length of the meridian is increased to provide for equal expansions in all directions C The mileage between the meridians is increased as the latitude increases D All of the above 75 What kind of weather would you expect to accompany the passage of a tropical wave? A Heavy rain and cloudiness B Good weather C A tropical storm D Dense fog 76 You have another ship overtaking you close aboard to starboard You have radar target bearings 090° relative at ranges of 0.5 miles In this case, the unwanted echoes are called A multiple echoes B spoking C indirect echoes D side-lobe echoes 77 When using the radar for navigating A the best fix is obtained by using a tangent bearing and a range B and using two radar range for a fix, the object of the ranges should be closed to reciprocal bearings C and using ranges, the most rapidly changing range should be measured last D and crossing a radar range of one object with the visual bearings of a second object, the two objects should be 80° to 110° apart 78 What is the length of a nautical mile? A 1,850 meters B 5,280 meters C 1,760 yards D 6,076 feet 79 A swift current occurring in a narrow passage connecting two large bodies of water, which produced by the continuously changing difference in height of tide at the two ends of the passage, is called _ A hydraulic current B rectilinear current C rotary current D harmonic current 80 Your ARPA had two guard zones What is the purpose of the inner guard zone? A Alert the watch officer that a vessel is approaching the preset CPA limit B Warn of small targets that are initially detected closer than the outer guard zone C Guard against targets loss during critical maneuvering situations D Sound an alarm for targets first detected within the zone 81 What is True of the history display of a target's past position on an ARPA? A It provides a graphic display to emphasize which vessel is on collision course B In the true presentation, it provides a quick visual check to determine if a vessel has changed course C The display is one of the primary inputs and must be in use when using the trial maneuver capability D It provides a graphic display of a target vessel's relative course, speed and CPA 82 Most GPS receiver use the doppler shift of the carrier phase to compute the A latitude B longitude C speed D time 83 What is a common unit of measure for atmospheric pressure? A Centimeters B Inches C Degrees D Feet 84 As a vessel change course to starboard, the compass card in a magnetic compass _ A first turn starboard then counterclockwise to port B also turn to starboard C remains aligned with compass north D turns counterclockwise to port 85 Chart correction information is Not disseminated through the _ A Summary of Corrections B Local Notice to Mariners C Daily Memorandum D Chart Correction Card 86 Diurnal aberration is due to _ A motion of the Earth in its orbit B rotation of the Earth on its axis C the body's orbital motion during the time required for its light to reach the Earth D a false horizon 87 The greater pressure difference between a high and a low pressure center, the A dryer the air mass will be B cooler temperature will be C greater the force of the wind will be D warmer the temperature will be 88 At the magnetic equator there is no induced magnetism in the vertical soft iron because A the lines of force cross the equator on a 0º- 180º alignment B the quadrantal error is 0º C there is no vertical component of the Earth's magnetic field D the inter-cardinal headings have less than 1º error 89 When taking stars, those bodies to the east and west will A change altitude rapidly B change altitude slowly C remain in an almost fixed position D appear to be moving in the plane of the horizon 90 A navigator fixing a vessel's position by a radar A must use information from targets forward of the beam B should never use radar bearings C should only use radar bearings when the range exceeds the distance to the horizon D can use radar information from one object to fix the position 91 When a buoy is in position only during a certain period of the year, where may the dates when the buoy is in position be found? A Light List B Notice to Mariners C On the chart D Coast Pilot 92 The National Imagery and Mapping Agency's (NIMA) List of Lights for coasts other than the United States and its possessions does Not provide information on A lighted buoys in harbors B storm signal stations C radio direction finder stations at or near lights D radio beacons located at or near lights 93 The quadrantal spheres are used A remove deviation on the inter cardinal headings B remove deviation on the cardinal compass headings C remove heeling error D compensate for induced magnetism in vertical soft iron 94 An aneroid barometer reading should be corrected for differences in _ A elevation B temperature C wind speed D latitude 95 At what angle to the isobars surface wind blows over the open sea? A About 90º B About 50º C About 25º D About 15º 96 Isobaric configuration with low pressure refers to as _ A trough B wedge C saddle D col 97 Precession of the earth's axis is caused by A movement of celestial equator as celestial poles move likewise B gravitational forces of the Sun and the moon acting on the earth's equatorial bulge C movement of vernal equinox westerly due to gravitational attraction D westward motion of the equinoxes along the ecliptic 98 If the observer is at Lat 50º N, declination of the sun is 15º S, which of the following is observed? A daylight and darkness are equal B darkness is longer than daylight C daylight is longer than darkness D darkness is shorter than daylight 10 269 The correction to be applied to ship's time to obtain the corresponding Greenwich meridian time prefixed by plus (+) sign at Western Longitude and by minus (-) sign at Eastern Longitude A Longitude in time B Zone description C Equation of time D Zone Meridian 270 The Great Circle distance from Latitude 35º 08' S, Longitude 029º 26' E to Latitude 33º 16' S, Longitude 116º 36' E is 4172.7 miles and the Initial course is 117º T A 43º 13.4' S B 43º 18.5' S C 43º 15.9' S D 44º 49.1' S 271 Two wind pressure system within 20º-30º Latitudes A Trade wind belt B Westerlies C Polar low belt D Doldrum 272 A vessel sails from Lat 30º 13' 14" N Long 125º 30' 20" E to Lat 45º N, Long 108º 45' 30" E Find DLAT and DLO? A 75º 13' 14" N / 016º 44' 50" W B 14º 46' 46" N / 016º 44' 50" W C 75º 13' 14" N / 125º 44' 10" E D 14º 46' 46" S / 125º 44' 10" E 273 Definite pattern of weather for a long period time A all of these B season C climate D weather 274 What is the periodical publications of astronomical data designed primarily for marine navigation? A Nautical Almanac B World Almanac C Notice to Mariners D Sailing directions 275 On the Tropic where the Earth deflecting force is very slight, the dominant factor is a force which contribute to the tendency of the wind to go off at a tangent to the isobars is: A Frictional resistance force B Frictional resistance force C Centripetal force D Corioli's force 276 Internationally used value of the atmospheric pressure in metric system A 29.92 inches B 29.92 inches C 29.92 inches D 1013 millibars 277 Find what course to steer from a place in latitude 12º 17' S and longitude 34º 29' E to latitude 12º 17' S and longitude 79º 16' E? A South West B West C East D South East 29 278 The angular distance north of south of the equator measured from degrees to 90 degrees A Parallel of Latitude B Longitude C Latitude D Difference of Latitude 279 Visibility is affected by liquid particles which condenses less than degrees C or F 32 degrees in the atmosphere is called: A Mist B Frost 280 281 282 283 284 285 286 287 C Dew D Fog What sailing method should not be used for distances more than a few hundred miles? A Plane sailing B Mercator Sailing C Parallel Sailing D Traverse Sailing If the LHA of the sun is 270º what is the meridian angle? A 90º East B 80º East C 80º West D 90º West The sequence of intervals of light and darkness in which the whole sequence being repeated identically at regular interval A period B fixed light C rhythmic light D characteristic Find the Great Circle distance from latitude 03º South, longitude 134º West to latitude 14º South, longitude 103º West? A 1909 miles B 1988 miles C 1899 miles D 1919 miles How far can a ship sail in 15 minutes if her speed is 18 knots? A 4.0 N.M B 4.5 N.M C 4.8 N.M D 5.0 N.M The actual speed of the vessel over the surface of the earth at any given time A speed over the ground B speed of intention C speed of advance D speed of through the water Wind tends to blow in circular along the isobar instead of perpendicular to the isobar, partly due to: A Difference in pressure and temperature between two localities B Difference in pressure and temperature between two localities C Corioli's force D Difference of temperature between two localities The course given is S 83º 22' East, find the true course? A 96º 39' B 96º 36' C 96º 38' D 96º 40' 30 288 This is a middle cloud with height of 6,000 to 20,000 feet A Alto cumulus B Stratus C Cumulus D Cirrus 289 The type of clouds prominent in hilly or mountainous districts covering the hill tops A Cumulus-Nimbus B Frontal Cloud C Orographic cloud D Cumulus 290 If the given course is South 69º West, what is the true course? A 248º B 249º C 246º D 247º 291 Which of the following publications would you refer to obtain navigational information when entering a foreign port? A Sailing Direction B Coast Pilot C World Port Index D Notice to Mariners 292 The meridian angle of the body is 090º West, latitude is 45º South What is the LHA of the body? A 270º B 090º West C 090º East D 090º 293 The line of intersection of a sphere and plane through its center A Small Circle B Half Circle C Hour Circle D Great Circle 294 Compass least, error is; A East B North C South D West 295 Any other rhumbline that spirals towards the poles A Distance B Loxodrome C Great Circle D Small circle 296 The shape of the earth is A Sphere B Elliptical C Circle D Oblate spheroid 297 The rate of temperature decrease with height, commonly noticed at troposphere is called: A Inversion rate B Adiabatic changes C Lapse rate D None of these 298 Descriptive term used for Beaufort No.10 with wind 48-55 knots is A Storm B Hurricane C Violent storm D Strong gale 31 299 A projection often illustrated as a cylinder A Mercator Projection B Polyconic Projection C Gnomonic Projection D Lambert Conformal 300 Which of the following is the official publication for the correction of charts, sailing directions, light list, etc? A List of Radio Signals B Coast Pilot C List of Lights D Notice to Mariners 301 This is the symbol for stratus cloud A St B Cu C Cs D Ci 302 Low pressure area occurring in high and middle latitudes A Extra-Tropical cyclone B Anticyclone C Tropical storm D Tropical cyclone 303 A low form of sheet cloud resembling fog but not resting on the ground A Cirrus B Nimbus C Stratus D Cumulus 304 The point which the Great Circle track reaches its highest latitude A Vertex B Rhumb course C Vortex D Rhumbline 305 An error of the magnetic compass caused by the magnetic field of the earth A Compass B Refraction C Variation D Deviation 306 The central meridian for a place with zone description +1 is : A 015º 00' East B 007º 30' East C 007º 30' West D 015º 00' West 307 Are small circle of the earth whose plane are parallel to the plane of the equator A Great Circle B Small Circle C Parallel of Latitude D Equator th 308 Your are in 120.0 West and your ship time is 2030 hrs June 20 Find GMT? A 0430 hrs/21 June B 1230 hrs/20 June C 0430 hrs/20 June D 1230 hrs/21 June 309 Front replacing cold air masses A Stationary front B Cold front C Occluded front D Warm front 32 310 The best course of action if a storm is suspected in the vicinity, the following knowledge is necessary A All of these B The bearing of the center of the storm C The drop of the barometric pressure D The path of the storm 311 The art of conducting a vessel in channels, harbors and along the coast A Dead Reckoning B Terrestrial Navigation C Piloting D Electronic Navigation 312 If the latitude is 47º North and the declination is 18º South, the amplitude of the body when setting is: A South 27º East B West 27º North C East 27º South D West 27º South 313 A ship covers a distance of 12 miles in hrs Find her speed? A knots B 6.5 knots C knots D knots 314 Is formed by the aggregation of ice crystal A snow B frost C Rain D Drizzle 315 What is the meridional parts of latitude 6º 47' South? A 405.7 B 405.2 C 405.6 D 405.5 316 In parallel sailing difference of longitude can be obtained by multiplying A Dep And Sec Mlat B Dep And Sine Lat C Dep And Sec Lat D Dep and Sine Mlat 317 Find the GHA of Aries from the following: GHA of star 061º 34.5' and SHA of star 301º 47.6' A 119º 46.9' B 240º 13.1' C 120º 49.6' D 191º 49.6' 318 What is the most important publication for correcting charts and thus keeping them up-todate? A light lists B radio signals C notice to mariners D sailing directions 319 The apparent path of the sun around the earth A Hour angle B Ecliptic C Ellipse D Equinoctial 33 320 Also in the construction of charts, requires that the distances from any two points to the center of the chart shall have the same ratio to each other as the corresponding distances A semi-distance B variable distance C short distance D equidistance 321 Which of the following publications would you refer to obtain navigational information when entering a foreign port? A light lists B sailing directions C radio signals D notice to mariners 322 The ratio of a given distance on the chart to the actual distance which it represents on the earth A terrestrial distance B scales C measurements D rhumbline 323 The Great Circle distance from Latitude 36º 57.2’ North, Longitude 006º 45.7' West to Latitude 24º 25.3' N, Longitude 085º 02.6' W is 3999 miles and the initial course is 283.8º What is the longitude of the vertex? A 039º 19.5' West B 059º 09.5' West C 029º 09.5' West D 019º 19.5' West 324 The alternative sailing in lieu of Great Circle to limit the latitude of vertex A Mercator Sailing B Composite Sailing C Parallel Sailing D Great Circle sailing 325 This is the symbol for cumulus cloud A St B Cs C Cu D Ci 326 A type of chart projection used wherein a cylinder is placed around the earth, tangent to the equator A Cylindrical projection B Lambert conformal projection C Simple conic projection D Polyconic projection 327 From long 155º East thru 155º West, what is the dlong? A 310º East B 050º East C 050º West D 310º West 328 Sailing method where a vessel is due east or west A Parallel sailing B Mercator Sailing C Traverse sailing D Plane sailing 329 Convert hrs - 15 mins - 42 sec to Arc A 108º 45' 10" B 105º 13' 55" C 105º 45' 55" D 108º 55' 30" 34 330 A great circle at latitude degree A Prime meridian B Poles C Equator D International date line 331 The three-dimensional shape obtained by rotating an ellipse about its minor axis A Ellipsoid of revolution B Precession of the axis C Rotation of the earth D Revolution of the earth 332 Notices to Mariners are published A Weekly B Bi-annually C Monthly D Yearly 333 From position Latitude 23º 21’ North, Longtitude 125º 28’ East, vessel proceeded through along the great circle track to arrival position at Latitude 40º 08’ North, Longitude 175º 45’ West Find the Great Circle Distance? A 4104 B 3104 C 2104 D 5104 334 Distance along the great circle connecting two points A Small circle distance B Loxodormic curve C Great circle distance D Distance 335 The line of intersection of a sphere and plane which does not pass through its center A Half circle B Great circle C Hour circle D Small circle 336 Find the LHA of star if the GHA of the star is 81º 57.3' and the longitude is 174º 32.9' West A 240º 24.4’ B 92º 35.6' C 267º 24.4’ D 256º 30.2’ 337 A.U.K based publication agency which specializes in the nautical publications A DOD B DMA C MMDA D UKHO 338 When the air is heated at the bottom, it becomes A None of these B Saturated C Unstable D Stable 339 Which is least true why there is a "non-constant" rate on the apparent sun as a celestial reference for time? A Motion of the sun along the ecliptic is tilted B Revolution of the Earth on its orbit is not constant C The effect of the nutation on the Earth's rotational axis D Rotation of the Earth on its axis is not constant 35 340 It is the sextant error on the index mirror when not perpendicular to the plane of the instrument A Parallel error B Index error C Side error D Perpendicularity 341 Is a frequently shift resulting from relative motion between a transmitter and receiver or reflector of acoustic or electromagnetic energy A Doppler B Echo C Acceleration D None of these 342 Ocean average depth is A none of these B 2, 075 feet C 2, 075 meter D 2, 075 fathom 343 You are in long 175º West and heading 270º where you change clocks? A 172º 30’ East B 165º 30’ East C 172º 30’ West D 180º 344 Type of tidal occurrence which is characterized by a larger inequality in the high water heights or in both Hence are usually two highs and low water each day, but occasionally the tide may become diurnal A none of these B diurnal C semi-diurnal D mixed type 345 The possible effect of one precessional cycle upon the global weather pattern and its climate is to interchange the pattern to the opposite, every A 26, 000 years B 25, 800 years C 2, 000 years D 14, 000 years 346 When the temperature decreases or the density of the atmosphere increases, the propagated waves are bended upward causing the decrease of radar horizon A None of these B Normal refraction C Sub- refraction D Sub- refraction 347 Local hour angle (LHA) can be found by; A LHA = GHA + east - west longitude B LHA = GHA - east longitude C LHA = GHA - west + east longitude D LHA = GHA - west longitude 348 This is otherwise known as mountain winds; A Anabatic wind B Gradient wind C Katabatic wind D Geostropic wind 349 Water vapor exerted pressure proportionate to the maximum capacity the atmosphere holds under certain temperature, any excess is condensed This is called; A Evaporation B Liqufication C Condensation D Saturation 36 350 A long and narrow depression with relatively steep sides; A Trench B Ridge C Rise D trough 351 A magnetic corrector bar for compensating against vertical soft irons like the funnels; A Flinders bar B Permanent magnet corrector C Quadrantal corrector D Heeling corrector 352 The angular distance measured from vernal equinox eastward and usually expressed in units of time; A LHA of Aries B Right ascension C Right sphere D GHA of Aries 353 At fixed point on the Earth, the barometer does not read the same all day long In low latitudes, it falls slowly between; A 6:00 AM to 1:00 PM B 11:00 AM to 5:00 PM C 9:00 AM to 3:00 PM D 10:00 AM to 4:00 PM 354 Stage of tropical cyclone, no decrease of pressure and no increase of wind force; A Depression stage B Immature stage C Mature stage D Decaying stage 355 Wind is due to; A pressure change B unequal heating of the land C temperature change D temperature and pressure change 356 It is the small circle on the earth surface where the sea and sky appears to meet A visible horizon B rational horizon C sensible horizon D true horizon 357 This is a radar transponder which emits a characteristic signal when triggered by a ship's radar A RACON B RECON C BEACON D None of these 358 The fictitious sun which moves at uniform speed in the celestial sphere which is equal to the average speed of the apparent sun along the ecliptic A Mean sun B Astronomical sun C Dynamical sun D True sun 359 Circumpolar means; A around the sun B around the earth C around the pole D around the planet 37 360 The meridian angle of the body is 090º West, latitude is 45º South What is the LHA of the body? A 090º East B 270º C 090º D 090º West 361 Earth's equatorial radius is _ A 3963.35 statute miles B 3963.35 statute miles C 3590.01 statute miles D 3693.55 statute miles 362 Coriolis or deflection force is due to; A earth’s revolution B earth’s rotation C elliptical orbit of the earth D nutation of the earth 363 In the Northern Hemisphere, the ship is in the dangerous semi-circle if; A the wind is backing B the wind is steady C none of these D the wind is veering 364 The point of the celestial sphere beneath the observer A Azimuth B Zenith C Observer;s point D Nadir 365 The vertical distance between trough and crest of the wave A rise B magnitude C range D height 366 The point of the celestial sphere directly overhead A Zenith B Vertical circle C Nadir D Hour circle 367 Flat-topped elevation over which depth of water is relatively small, but which is sufficient to surface navigation A reef B coral reef C bank D shoal 368 It is the angle between the horizontal plane through the observer's eye A Parallax B Altitude correction C Dip D Semi-diameter 369 A low form of sheet cloud resembling fog but not resting on the ground A Nimbus B Cumulus C Stratus D Cirrus 38 370 Is the process of measuring a craft's velocity and displacement (and even the altitude, if used by aircraft) from a known start point through sensing the accelerations acting on it in known directions by means of devices that mechanize the Newton's Law of motion A Inertial navigation B Electronic navigation C Navigational Satellite System D None of these 371 When the body is on the rational horizon, what is its zenith distance? A 000º B 090º C 270º D 180º 372 If the temperature of the mass of air increases in which the moisture content remains constant A The relative humidity of that air will increase B The relative humidity of that air will decrease C The relative humidity remains constant D None of these 373 The physical reason why the earth's axis point to the constant direction of the North Star, Polaris is due to A Precession of the Equinox B General precession C Gyroscopic precession D Gyroscopic inertia 374 The horizontal distance from crest to crest or from trough to trough A wave velocity B wave length C wave height D wave period 375 A great circle through the celestial poles and a point or body on the celestial sphere A Equinoctial B Zenith C Hour circle D Small circle 376 A larger depression of more or less circular or oval form A basin B trough C swells D trench 377 Upper parts of elevation which show the effects of erosion and deposition A Reef B Shoal C Bank D All of these 378 This is a shadow area when ship structures at equal height with the scanner, causing areas behind scanner to be un-scanned A Reflected sector B Tuned C Shadowed sector D Blind sector 379 The pressure of the atmosphere fall off with increasing height above the Earth's surface, because A Since the pressure of the atmosphere is due to the weight of the column of air overhead, as one ascends, leaving some of the column of air below B Earth's gravitational force sustains air by escaping C Density increases with temperature and temperature increases with height D Density decreases with temperature and temperature decreases with height 39 380 The central meridian for a place with zone description at -8 is A 120º West B 125º West C 125º East D 120º East 381 The north seeking pole of the magnetic compass is symbolically colored A Green B Blue C Yellow D Red 382 Below the layer of 125 meter depth, at the tropic, a zone of rapid temperature decreases is called _ A thermocline layer B isothermal layer C mixed layer D none of these 383 Dangerous semi-circle in the Northern Hemisphere A port side B left C starboard D counterclockwise 384 The increase in pressure with depth is nearly constant because water is only slightly compressible Its coefficient of compressibility is; A 0.00046 per bar B 0.0046 per bar C none of these D 0.000046 per bar 385 Speed of light is; A x 10 meter / sec B x 10 meter / sec C x 10 meter / sec D x 10 meter / sec 386 The great circle that passes through the Zenith and Nadir A Vertical circle B Prime vertical circle C Principal vertical circle D Hour circle nd th 387 This occurs when moon is between quarter and full moon and between quarter and new moon A priming B spring tide C lagging D neap tide 388 A horizontal force which balanced the gradient force is: A pressure gradient B centripetal force C coriolis force D geostrophic force th 389 At 1845 zone time, on 24 October 1996, vessel departs a Bimini Island at latitude 35º 50' North and longtitude 77º West (ZD+ 5), bound for bishop rock at Latitude 49º 40' North, longitude 006º 34' West, with average speed of 13.6 knots If the aggregate distance to be covered is 3,491 nautical miles, what is the estimated arrival zone time at Bishop's rock? A 04 Nov 1626 B 03 Nov 1600 C 04 Nov 0627 D 03 Nov 1627 40 390 The Earth's rotation causes the Sun and other celestial bodies to appear to cross the sky, from _ A East to West B South to North C West to East D North to South 391 A sextant error when the pivot of the index bar is not at the center of the arc A Centering error B Side error C Prismatic error D Shade error 392 Planets whose orbits larger than that of the earth's orbit are classified as; A superior planets B gas planets C quadrature D inferior planets 393 Doppler sonar navigation in commercial vessel is best exemplified by the use; A GPS navigator B Echo sounder C Radar D Sextant 394 The type of clouds prominent in hilly or mountainous districts covering the hill tops; A Frontal cloud B Cumulu – Nimbus C Cumulus D Orographic cloud 395 If the GHA of the Aries is 270º and GHA of the sun is 180º, your longitude is 090º East and your SHA of the star Canopus is 090º what is the LHA of the star Canopus A 360º B 180º C 090º D 270º 396 Low pressure with light wind but frequent calms; A Doldrum B Polar low belt C Easterlies D Trade wind 397 The line were the earth and sky appears to meet together; A Declination B Nadir C Horizon D Zenith 398 The expression used which means "sun standing still" ; A Elongation B Solstice C Quadrature D Equinox 399 Due to precession of the equinoxes, the celestial poles are describing circles to the sky The north celestial pole is moving closer to the Polaris, which it will pass at angular distance of 28 minutes of arc in the year? A 2, 000 AD B 14000 AD C 25, 800 AD D 2102 AD 41 400 The ocean temperatures, everywhere is below 60º F at the depth greater than; A 100 meters B 100 fathoms C 200 fathoms D 300 fathoms 42 43 [...]... West D 310º West 328 Sailing method where a vessel is due east or west A Parallel sailing B Mercator Sailing C Traverse sailing D Plane sailing 329 Convert 7 hrs - 15 mins - 42 sec to Arc A 108º 45' 10" B 1 05 13' 55 " C 1 05 45' 55 " D 108º 55 ' 30" 34 330 A great circle at latitude 0 degree A Prime meridian B Poles C Equator D International date line 331 The three-dimensional shape obtained by rotating... scales C measurements D rhumbline 323 The Great Circle distance from Latitude 36º 57 .2’ North, Longitude 006º 45. 7' West to Latitude 24º 25. 3' N, Longitude 0 85 02.6' W is 3999 miles and the initial course is 283.8º What is the longitude of the vertex? A 039º 19 .5' West B 059 º 09 .5' West C 029º 09 .5' West D 019º 19 .5' West 324 The alternative sailing in lieu of Great Circle to limit the latitude of... C Fix D DR 253 If the altitude of the body is 45 degrees, what will be its zenith distance? A 40 degrees B 50 degrees C 45 degrees D 90 degrees 254 The stronger the pressure gradient, the wind will be A unchanged B none of these C weaker D stronger 255 Intended for navigation and anchorage in harbors and small waterways A Harbor charts B General charts C Sailing charts D Coastal charts 256 From lat... Great Circle sailing 3 25 This is the symbol for cumulus cloud A St B Cs C Cu D Ci 326 A type of chart projection used wherein a cylinder is placed around the earth, tangent to the equator A Cylindrical projection B Lambert conformal projection C Simple conic projection D Polyconic projection 327 From long 155 º East thru 155 º West, what is the dlong? A 310º East B 050 º East C 050 º West D 310º West 328... South D West 27º South 313 A ship covers a distance of 12 miles in 2 hrs Find her speed? A 8 knots B 6 .5 knots C 7 knots D 6 knots 314 Is formed by the aggregation of ice crystal A snow B frost C Rain D Drizzle 3 15 What is the meridional parts of latitude 6º 47' South? A 4 05. 7 B 4 05. 2 C 4 05. 6 D 4 05. 5 316 In parallel sailing difference of longitude can be obtained by multiplying A Dep And Sec Mlat B... from Latitude 35 08' S, Longitude 029º 26' E to Latitude 33º 16' S, Longitude 116º 36' E is 4172.7 miles and the Initial course is 117º T A 43º 13.4' S B 43º 18 .5' S C 43º 15. 9' S D 44º 49.1' S 271 Two wind pressure system within 20º-30º Latitudes A Trade wind belt B Westerlies C Polar low belt D Doldrum 272 A vessel sails from Lat 30º 13' 14" N Long 1 25 30' 20" E to Lat 45 N, Long 108º 45' 30" E Find... Polar low belt D Doldrum 272 A vessel sails from Lat 30º 13' 14" N Long 1 25 30' 20" E to Lat 45 N, Long 108º 45' 30" E Find DLAT and DLO? A 75 13' 14" N / 016º 44' 50 " W B 14º 46' 46" N / 016º 44' 50 " W C 75 13' 14" N / 1 25 44' 10" E D 14º 46' 46" S / 1 25 44' 10" E 273 Definite pattern of weather for a long period time A all of these B season C climate D weather 274 What is the periodical publications... sea room should pass within a Tropical storm is A 50 miles B 80 miles C 250 miles D 100 miles 250 What is the most important publication for correcting charts and thus keeping them up to date? A Radio signals B Light lists C Notice to Mariners D Sailing directions 251 Relative humidity is measured by: A hydrometer B hygrometer C anemometer D barometer 252 The geographical position of a ship may be determined... loose speed than smaller ships This variable is referred to as A size of ships B inertia C shape of hull D none of these 104 Following are unwanted echoes Except ; A normal radar echoes B second trace echoes C weather echoes D none of these 1 05 The extension of the earth's equator to the celestial sphere A declination B equinoctial C diurnal circle D prime vertical 106 The path of a ship compass... Latitude 23º 21’ North, Longtitude 1 25 28’ East, vessel proceeded through along the great circle track to arrival position at Latitude 40º 08’ North, Longitude 1 75 45 West Find the Great Circle Distance? A 4104 B 3104 C 2104 D 51 04 334 Distance along the great circle connecting two points A Small circle distance B Loxodormic curve C Great circle distance D Distance 3 35 The line of intersection of a sphere