A radar range to a small，charted object such as a light will provide a line of position in which form?A.Straight lineB.ArcC.ParabolaD.Hyperbola
A radar range to a small，charted object such as a light will provide a line of position in which form?
A.Straight line
B.Arc
C.Parabola
D.Hyperbola
相关考题：
On small scale charts of ocean areas where hydrographic information is，in many cases，still sparse，charted shoals may be in error as regards______．A.positionB.position，depth and extentC.depth and extentD.position and extent
The common way to obtain your ship’s position is ______.A.keeping a close watch and lookoutB.taking a radar range and bearingC.observing a radar target and listening to signalsD.keeping a well clear caution
when you are steering on a pair of range lights and find the upper light is in line above the lower light ,you should _____.A.continue on the present courseB.come rightC.wait until the lights are no longer in a vertical lineD.come left
A line of position derived by radar range from an identified point on a coast will be a(n) ______.A.straight lineB.arcC.parabolaD.line parallel to the coast
A true bearing of a charted object，when plotted on a chart，will establish a ______.A.fixB.line of positionC.relative bearingD.range
The irregular black line around a charted light such as Race Rock Light indicates that it is ______.A.unwatchedB.surrounded by riprapC.a minor lightD.constructed on an artificial island
What provides little or no indication that a vessel is dragging anchor ________．A.Increasing radar range to a fixed object aheadB.Drift lead with the line leading perpendicular to the centerlineC.Vibrations felt by placing a hand on the cableD.Changing bearings to distant fixed objects abeam
In determining the scope of anchor line to pay out when anchoring a small boat, one must consider the ______.A.charted depth of water onlyB.depth of water, including tidal differencesC.time and date of anchoringD.type of anchor being used
单选题The common way to obtain your ship’s position is（）.Akeeping a close watch and lookoutBtaking a radar range and bearingCobserving a radar target and listening to signalsDkeeping a well clear caution
单选题There is a possibility that small vessel，ice and other floating objects may not be（）by radar at an adequate range.AreflectBshownCdetectedDdefected
单选题A line of position derived by radar range from an identified point on a coast will be a(n) （）.Astraight lineBarcCparabolaDline parallel to the coast
单选题What is the name of the movable，radial guide line used to measure direction on a radar?（）ACompass roseBCursorCPlan position indicatorDVariable range marker
单选题A navigator fixing a vessel’s position by radar （）.Acan use radar information from one object to fix the positionBshould never use radar bearingsCshould only use radar bearings when the range exceeds the distance to the horizonDmust use information from targets forward of the beam
单选题Which signal is detected as originating from a SART?（）AThe Morse code distress series S-O-S repeated 3 times followed by DE and the vessel's call signBA line of blip code on a radar screen outward from the SART's position along its line of bearingCA line of blip code on a radar screen inward from the SART's position to its own ship along its line of bearingDNone of these
单选题A line of position formed by sighting two charted objects in line is called a(n)（）.Arelative bearingBrange lineCtrack lineDestimated position
单选题When using a buoy as an aid to navigation which of the following should be considered?（）AThe buoy should be considered to always be in the charted locationBIf the light is flashing，the buoy should be considered to be in the charted locationCThe buoy may not be in the charted positionDThe buoy should be considered to be in the charted position if it has been freshly painted
单选题A line of position is（）.Aa line connecting two charted objectsBa line on some point of which the vessel may be presumed to be locatedCthe position of your vesselDnot used in a running fix
单选题What is TRUE when operating in fog and other vessels are detected by radar?（）Ayou should make an ample change to port for a vessel crossing on the starboard bowBYou should maneuver in ample time if a close-quarters situation is developingCYou should determine the course and speed of all radar contacts at six minutes intervalsDLong-range scanning will provide early warning of all other vessels within the radar’s range
单选题The 3-cm radar as compared to a 10-cm radar with similar specifications will（）.Agive better range performance in rain，hail，etcBdisplay small targets in a mass of dense sea clutter at a greater rangeChave less sea return in choppy rough seasDdisplay a more map like presentation for inshore navigation
单选题Small floes of rough，hummocky sea ice capable of damaging a vessel（）.Acan usually be detected by radar in a smooth sea at a range of 4 to 6 kilometersBare indistinguishable from sea return on the PPICare invisible to radar when covered with a thick layer of snowDare usually seen at night before they are close enough to provide a radar echo
单选题The irregular black line around a charted light such as Race Rock Light indicates that it is （）.AunwatchedBsurrounded by riprapCa minor lightDconstructed on an artificial island
单选题What does a SART signal sound or look like?（）AIt transmits SOS and the vessel's name and position in slow speed Morse CodeBIt will appear on a radar unit's PPI as a line of dots radiating outward with the innermost dot indicating the SART's positionCIt will appear on a radar unit's PPI as a line of dots radiating outward with the outermost dot indicating the SART's positionDNone of the above
单选题What provides little or no indication that a vessel is dragging anchor? （）AIncreasing radar range to a fixed object aheadBDrift lead with the line leading perpendicular to the centerlineCVibrations felt by placing a hand on the cableDChanging bearings to distant fixed objects abeam
单选题If there is any doubt as to the proper operation of a radar，which statement is TRUE?（）.AOnly a radar expert can determine if the radar is operatingBAll radars have indicator lights and alarms to signal improper operationCA radar range compared to the actual range of a known object can be used to check the operation of the radarDThe radar resolution detector must be energized to check the radar
单选题A piece of small stuff (small line) secured to an object to prevent it from going adrift is a（）.AlanyardBkeeperCnooseDstopper
单选题When using the radar for navigating（）.Athe best fix is obtained by using a tangent bearing and a rangeBand using two radar ranges for a fix，the objects of the ranges should be close to reciprocal bearingsCand using ranges，the most rapidly changing range should be measured lastDand crossing a radar range of one object with the visual bearing of a second object，the two objects should be 80°to 110°apart
单选题A radar range to a small，charted object such as a light will provide a line of position in which form? （）AStraight lineBArcCParabolaDHyperbola