单选题Areas which cannot be scanned by the radar of the vessel because they are shielded by parts of its superstructure, masts,etc means（）.Ablind sectorsBsheltered areaCunseen areaDunscan ble area
单选题
Areas which cannot be scanned by the radar of the vessel because they are shielded by parts of its superstructure, masts,etc means（）.
A
blind sectors
B
sheltered area
C
unseen area
D
unscan ble area
参考解析
解析：
暂无解析
相关考题：
If you are the Master of a towing vessel whose only working radar no longer functions，what must you do?A.Notify the Captain of the Port (COTP) if you cannot repair it within 96 hoursB.Notify the Officer in Charge of Marine Inspection (OCMI) if you cannot repair it within 48 hoursC.Moor the vessel until it is repairedD.Anchor the vessel until it is repaired
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
AREAS WHICH CANNOT BE SCANNED BY THE RADAR OF THE VESSEL BECAUSE THEY ARE SHIELDED BY PARTS OF ITS SUPERSTRUCTURE, MASTS, ETC means ______.A.Blind sectorsB.Sheltered areaC.Unseen areaD.Unscanable area
In fog you observe your radar and determine that risk of collision exists with a vessel which is 2 miles off your port bow. You should ______.A.stop your enginesB.sound the danger signal at two-minute intervalsC.hold course and speed until the other vessel is sightedD.take avoiding action as soon as possible
In determining a safe speed, the Rules list all of the following as factors which must be taken into account EXPECT the ______.A.limitations of radar equipmentB.presence of background lights at nightC.maximum horsepower of your vesselD.maneuverability of your vessel
In restricted visibility, a vessel which detects by radar alone the presence of another vessel shall determine if a close quarters situation is developing or risk of collision exists. If so, she shall __________.A.sound the danger signalB.when taking action, make only course changesC.avoid altering course toward a vessel abaft the beamD.All of the above
单选题To determine if risk of collision exists，a vessel which is fitted with radar must use（）.Aradar scanningBradar plottingCcompass bearingsDAll of the above
单选题You are underway in thick fog. You have not determined if risk of collision exists. Which statement is TRUE?（）.AYour speed must be reduced to bare steeragewayBA look-out is not required if the radar is onCFog signals are only required when a vessel is detected by radarDThe radar should always be kept on a short-range scale
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If you are the Master of a towing vessel whose only working radar no longer functions，what must you do?（）ANotify the Captain of the Port (COTP) if you cannot repair it within 96 hoursBNotify the Officer in Charge of Marine Inspection (OCMI) if you cannot repair it within 48 hoursCMoor the vessel until it is repairedDAnchor the vessel until it is repaired
单选题Which conditions will normally cause a SART to operate in the active mode?（）AIt will respond only to interrogation by 9-Ghz radar signalsBA SART will normally respond to interrogation from a searching vessel's radar if the radar antenna is at least 15 meters highCA SART will normally respond to interrogation from a searching aircraft's radar if the radar's output power is at least 10，000 watts and the aircraft is at a height of 3000 feet and within 30 nautical milesDAll of the above
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When using an ARPA，what should you consider in order to evaluate the information displayed?（）AThe target vessel's generated course and speed are based solely on radar inputsBNavigational constraints may require a target vessel to change courseCThe trial maneuver feature will automatically determine a course that will clear all targetsDYou cannot determine if a small target has been lost due to sea return
多选题OSPF stub areas are an important tool for the Network designer； which of the following two shouldbe considered when utilizing OSPF stub areas？ （）AOSPF stub areas increase the size of the LSDB with the addition of Type 3 and 5 LSAsBOSPF not so stubby areas are particularly useful as a simpler form of summarizationCOSPF stub areas are always insulated from external changesDOSPF totally stubby cannot distinguish among ABRs for the best route to destinationsoutsidethe areasEOSPF stub areas can distinguish among ASBRs for destinations that are external to the OSPFdomain
单选题Access to a cargo pumproom on a tank vessel carrying grades A，B，C or D liquid cargoes shall be（）.Aat least 13.1 feet away from the galleys，living quarters or navigation spacesBfrom the open deckConly from areas equipped with power ventilation systemsDisolated from any part of the vessel which normally contains sources of vapor ignition
单选题In determining safe speed，the Rules list all of the following as factors which must be taken into account EXCEPT the（）.Alimitations of radar equipmentBpresence of background lights at nightCmaximum horsepower of your vesselDmaneuverability of your vessel
单选题Which statement is true concerning a vessel equipped with operational radar?（）.AThe Master of the vessel must be on the bridge when the radar is in useBThe radar equipment is only required to be used in restricted visibilityCThe use of a radar excuses a vessel from the need of a look-outDThis equipment must be used to obtain early warning of risk of collision
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An indirect radar echo is caused by a reflection of the main lobe of the radar beam off the observer’s vessel. Which of the following is NOT a characteristic of indirect echoes?（）.ATheir bearing is almost constant，even when the true bearing of the contact changes appreciablyBThey always appear on a bearing of 90°from the true bearing of the contactCThe indirect echoes usually appear in shadow sectorsDWhen plotted，their movements are usually abnormal
单选题In fog you observe your radar and determine that risk of collision exists with a vessel which is 2 miles off your port bow. You should（）.Astop your enginesBsound the danger signal at two-minute intervalsChold course and speed until the other vessel is sightedDtake avoiding action as soon as possible
单选题You are underway in thick fog.You have not determined if risk of collision exists.Which statement is true?（）AYour speed must be reduced to bare steerage waysBA look-out is not required if the radar is onCThe radar should always be kept on a short-range scaleDFog signals are only required when a vessel is detected by radar
单选题AREAS WHICH CANNOT BE SCANNED BY THE RADAR OF THE VESSEL BECAUSE THEY ARE SHIELDED BY PARTS OF ITS SUPERSTRUCTURE，MASTS，ETC means（）.ABlind sectorsBSheltered areaCUnseen areaDUnscanable area
单选题Which statement concerning maneuvering in restricted visibility is FALSE?（）.AA vessel which cannot avoid a close-quarters situation with a vessel forward of her beam shall reduce her speed to bare steeragewayBA vessel which hears a fog signal forward of her beam shall stop her enginesCA vessel which hears a fog signal forward of the beam shall navigate with cautionDIf a vessel determines by radar that a close-quarters situation is developing，she shall take avoiding action in ample time
单选题In restricted visibility, a vessel which detects by radar alone the presence of another vessel shall determine if a close quarters situation is developing or risk of collision exists. If so, she shall（）.Asound the danger signalBwhen taking action, make only course changesCavoid altering course toward a vessel abaft the beamDAll of the above
单选题Which of the following radar contacts will present the most immediate danger?（）.AA vessel on the starboard bow whose bearing is changing and range is decreasingBA vessel on the starboard bow whose bearing is steady and range is increasingCA vessel on the port bow whose bearing is steady and range is decreasingDA vessel on the port bow whose bearing is changing to the left and range decreasing
单选题Which statement is TRUE concerning a vessel equipped with operational radar?（）.AShe must use this equipment to obtain early warning of risk of collisionBThe use of a radar excuses a vessel from the need of a look-outCThe radar equipment is only required to be used in restricted visibilityDThe safe speed of such a vessel will likely be greater than that of vessels without radar