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
A line of position derived by radar range from an identified point on a coast will be a(n) （）.
A
straight line
B
arc
C
parabola
D
line parallel to the coast
参考解析
解析：
暂无解析
相关考题：
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
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 line of position derived from a loran reading is a section of a(n) ______.A.straight lineB.arcC.parabolaD.hyperbola
A line of position from a celestial observation is a segment of a ______.A.circle of equal altitudeB.parallel of declinationC.parallel of altitudeD.vertical circle
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
Coral atolls，or a chain of islands at right angles to the radar beam，may show as a long line rather than as individual targets due to ______.A.the effects of beam widthB.limitations on range resolutionC.the pulse length of the radarD.the multiple-target resolution factor
You are in the process of adding a barge to your tow．A line run from your power capstan and around timber heads on your tow is made fast on the new barge so that it can be pulled into position．This line is called a ______．A.Scissors wireB.Capstan lineC.Spring lineD.Fore and aft line
A vessel is approaching from dead ahead.Both of her sidelights are visible and her range lights are in line. Which of the following could you do first? ______.A.Sound one blast of the whistleB.Alter course to starboardC.Construct a radar plotD.Sound the danger signal
How can a SART’s effective range be maximized?______A.The SART should be placed in water immediately upon activation.B.The SART should be held as high as possible.C.Switch the SART into the “high” power position.D.If possible, the SART should be mounted horizontally so that its signal matches that of the searching radar signal.
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A line of position from a celestial observation is a segment of a （）.Acircle of equal altitudeBparallel of declinationCparallel of altitudeDvertical circle
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 star is observed at lower transit. The line of position derived from this sight is（）.Aon the prime verticalBa latitude lineCa longitude lineDof no special significance
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Your vessel has anchored in a channel known to have strong tidal currents. To check your position you take a round of bearings，one of which is a range in line. One hour later the bearing on the lights in range opens up. This indicates the ship is（）.AswingingBdredging her anchorCtaking bearings of the lightsDtaking distances of the lights
单选题Coral atolls，or a chain of islands at right angles to the radar beam，may show as a long line rather than as individual targets due to （）.Athe effects of beam widthBlimitations on range resolutionCthe pulse length of the radarDthe multiple-target resolution factor
单选题A vessel is approaching from dead ahead． Both of her sidelights are visible and her range lights are in line. Which of the following could you do first?（）.ASound one blast of the whistleBAlter course to starboardCConstruct a radar plotDSound the danger signal
单选题A line of position derived from a loran reading is a section of a(n) （）.Astraight lineBarcCparabolaDhyperbola
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You are scanning the radar screen for a buoy fitted with racon. How should this signal appear on the PPI display?（）AStarting with a dash and extending radially outward from the targetBAs a broken line from center of PPI to the targetCStarting with a dot and extending radially inward from the targetDStarting with a dash and extending to the right of the target
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
单选题What does EPIRB stand for? （）AEmergency Position Indicating Radar BuoyBElectronic Pulse Indicating RadiobeaconCEmergency Position Indicating RadiobeaconDNone of the above