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【单选题】

（）sends a radio signal from the bottom of the ship to the sea-bed,from which it is reflected.

A、The marine sextant

B、The chronometer

C、The echo sounder

D、The radar

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更多“（）sends a radio signal from the bottom of the ship to the sea-bed,from which it is reflected.”相关的问题
第1题
[单选题] Echo sounder sends a（） (无线电信号)from the bottom of the ship to the seabed.

A、radio signal  B、radio wave  C、signal  D、signal radio  

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第2题
[单选题] Every radio installation shall be clearly marked with the（）, the ship station identity and other codes as applicable for the use of the radio installation.

A、call sign  B、port of register  C、radio name  D、signal label  

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第3题
[单选题] How does a coast radio station communicating by HF radio normally identify itself?（）

A、By its subscriber number  B、By its call sign  C、By its MMSI  D、By its MID  

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第4题
[单选题] By using（）system a ship can send a distress message and know with certainty it will be received.

A、COSPAS-SARSAT  B、SATELLITE  C、terrestrial radio  D、INMARSAT  

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第5题
[单选题] Under the International Code of Signals how are geographical locations such as New York City transmitted?（）

A、A commonly used abbreviation such as NYC is used  B、The name is spelled out  C、The geographical coordinates are used  D、The radio station call sign for the nearest marine radio station is used  

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第6题
[单选题] Under the International Code of Signals how are geographical locations such as New York City transmitted（）.

A、A commonly used abbreviation such as NYC is used  B、The name is spelled out  C、The geographical coordinates are used  D、The radio station call sign for the nearest marine radio station is used  

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第7题
[单选题] Any person maintaining a listening watch on a bridge to bridge radio-telephone must be able to（）.

A、Speak English  B、Repair the unit  C、Speak Spanish  D、Send Morse code  

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第8题
[单选题] When testing a Class A EPIRB you will know the EPIRB is working properly if you hear on 99.5 Mhz FM or any vacant frequency on a nearby AM radio（）.

A、a distinctive signal  B、the Morse Code signal for SOS  C、a computerized voice announcement of Mayday  D、your vessel's International Radio Call Sign  

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第9题
[单选题] （）sends a radio signal from the bottom of the ship to the sea-bed,from which it is reflected.

A、The marine sextant  B、The chronometer  C、The echo sounder  D、The radar  

点击查看答案
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