Most modern Loran-C receivers，when not tracking properly，have a（n）______．A.Bell alarm to warn the userB.Lighted alarm signal to warn the userC.Alternate signal keying systemD.View finder for each station
Most modern Loran-C receivers，when not tracking properly，have a（n）______．
A.Bell alarm to warn the user
B.Lighted alarm signal to warn the user
C.Alternate signal keying system
D.View finder for each station
相关考题：
Operation of the valve control release on a fixed CO2 system must immediately ______.A.release CO2 to the protected spaceB.secure all mechanical ventilation in the protected spaceC.sound the rig’s general alarm signal for a fireD.sound an alarm in the ballast control room
____，the bus started at once.A、The signal was givenB、The signal givingC、The signal givenD、When the signal given
The alarm signal for engine room catching fire is a blast of random bell followed by____.A.two knocksB.three BlocksC.four knocksD.five knocks
Loran-C uses the multiple pulse system because ______．A.Less signal energy is necessary for receiver operationB.More signal energy is available at the receiverC.It significantly increases the peak powerD.It increases the signal capacity
______ is not contained in the muster list．A.the details of how the order to abandon ship is givenB.the details of the general emergency alarm signal，the fire alarm signal and the public address systemC.the substitutes for key persons who may become disabledD.the various fire sections enclosed by“A”class divisions
下面属于5GNR上行链路reference-signal的是（）A、Demodulation-reference-signal-for-PUSCHB、Phase-tracking-reference-signals-for-PUSCHC、Demodulation-reference-signal-for-PUCCHD、Sounding-reference-signal
单选题The signal for fire alarm on a ship must be indicated（）.Aat each alarm bellBat each alarm actuatorCnear all exitsDon the station bill
单选题When you hear three short blasts on the ships whistle and the same signal on the general alarm bells, you （）.Aare required to go to your life-raftBare dismissed from drillsCshould point to the man overboardDshould start the fire pump
单选题Which of the following represents the emergency signal for fire aboard ship?（）AMore than six short blasts and one long blast on the whistleBContinuous blast of the ships whistle for a period of not less than 10 seconds supplemented by the same signal on the general alarmCThree short blasts of the whistle supplemented by the same signal on the general alarmDMore than six short blasts and one long blast on the whistle supplemented by the same signal on the general alarm
单选题A vessel in distress should send by radio telephone the two tone alarm signal followed immediately by the（）.Adistress positionBspoken words Mayday，Mayday，MaydayCship's nameDship's call letters
单选题If you hear more than six short blasts and one long blast of the whistle supplemented by the same signal on the general alarm,you should（）.Astart the fire pumpBgo to your man overboard stationCgo to your lifeboat stationDcollision station
单选题You hear the general alarm and ship’s whistle sound for over 10 seconds. Traditionally，this is the signal for（）.Aabandon shipBdismissal from fire and emergency stationsCfire and emergencyDman overboard
单选题The signal for a fire emergency on an OSV is（）.Aa 30 second on 30 second off alternating signalBthe continuous blast of the ships whistle for not less than 10 seconds supplemented by the continuous ringing of the general alarm bells for not less than 10 secondsCan intermittent ringing of the general alarm for not less than ten secondsDannounced over the PA system
单选题The Class A EPIRB transmits a signal（）.Athat follows the curvature of the earthBthat can be picked up by SARSAT satelliteCthat activates an alarm on board nearby aircraftDto alert shore stations and then transmits a homing signal
单选题A vessel in distress should send by radio telephone the two tone alarm signal followed immediately by the（）.ADistress positionBSpoken words“Mayday，Mayday，Mayday”CShip's nameDShip's call letters
单选题While reading the muster list, you see that "three short blasts on the ships whistle and the same signal on the general alarm bells" is the signal for （）.Aabandon shipBdismissal from drillsCfire and emergencyDman overboard
单选题Traditionally，the signal for fire aboard ship is（）.Amore than 6 short blasts and 1 long blast on the whistle，and the same signal on the general alarmBcontinuous sounding of the ship's whistle and the general alarm for at least 10 secondsC1 short blast on the whistleDalternating short and long blasts on the ship's whistle
单选题Most modern Loran-C receivers，when not tracking properly，have a（n）（）.ABell alarm to warn the userBLighted alarm signal to warn the userCAlternate signal keying systemDView finder for each station
单选题Loran-C uses the multiple pulse system because（）.ALess signal energy is necessary for receiver operationBMore signal energy is available at the receiverCIt significantly increases the peak powerDIt increases the signal capacity
单选题All Loran-C transmitting stations are equipped with cesium frequency standards which permit （）.Aevery station in one chain to transmit at the same timeBeach station to transmit without reference to another stationCon-line transmission of single-line transmitters at the same timeDeach station to only depend on the master for synchronization and signal ratio
单选题While working in the engine room, you hear seven short blasts followed by one long blast on the ships whistle, supplemented by the same signal on the general alarm bellsYou should （）.Astart the fire pump to charge the fire mainBstandby the main console and await orders from the engineer on watchCgo to your fire stationDgo to your lifeboat station
单选题While reading the station bill, you find "three (3) short blasts on the whistle and three (3) short tings on the general alarm bells," this signal is for （）.Aabandon shipBdismissal from fire and emergency stationsCfire and emergencyDman overboard
单选题You hear the general alarm bells and ships whistle sound for over 10 secondsTraditionally, this is the signal for （）.Aabandon shipBdismissal from drillsCfire and emergencyDlower lifeboats
单选题How can vessel personnel detect the operation of a SART in its vicinity?（）AA unique radar signal consisting of a blip code radiating outward from a SART's position along its line of bearingBA unique two tone warbling signal heard on VHF-FM ch-70CA unique two tone alarm signal heard upon the automatic unmuting of the 2182 kHz radiotelephone automatic watch receiverDThe SART signal appears as a target which comes and goes; the effect of heavy swells on the SART
单选题The alarm signal for engine room catching fire is a blast of random bell follow by （）Atwo knockBthree knocksCfour knocksDfive knocks
单选题The radiotelegraph alarm signal may be used to announce（）.Athat a distress message will followBa request for assistance in searching for a man overboardCan urgent warning about a cycloneDAll of the above
单选题Operation of the valve control release on a fixed CO2 system must immediately（）.Arelease CO2 to the protected spaceBsecure all mechanical ventilation in the protected spaceCsound the rig's general alarm signal for a fireDsound an alarm in the ballast control room