超星 - 英语阅读9

单选题

Which of the following equipment on board is for the COSPAS-SARSAT system?

A. DSC
B. NAVTEX
C. VHF
D. EPIRB

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单选题

NAVTEX transmitter identification character B1 is a single unique letter which is allocates to each NAVTEX _________

A. receiver
B. SES
CES
D. Transmitter

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单选题

The frequency 156.525MHz and 156.8MHz should be used m the band of _________.

A. MF
B. VHF
C. HF
D. LF

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单选题

Which bands does a ship station in distress alert other ships in its vicinity by DSC on?

A. High frequency and medium frequency band
B. Very high frequency and medium frequency band.
C. High frequency and Very high frequency
D. High frequency， medium frequency band and Very high frequency

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单选题

What must be entered, after the Shore (I.D.) and # sign is entered and a ring-back tone is heard, to obtain the intervention of the telephone operator in the INMARSAT Standard-F service?

A. 00
B. 01
C. 10
D. 11

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单选题

The GMDSS is composed of _________.

A. satellite and terrestrial systems
B. only navigation and alerting systems
C. just MSI system and locating system
D. SAR co-ordination system

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单选题

SOLAS vessels are able to communicate with shore stations _________.

A. no matter where they are and no matter what time it is
B. in major oceans and at scheduled time
C. at regular times everyday
D. from some fixed positions

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单选题

Messages bearing the priority marking ROUTINE are to be broadcast _________.

A. immediately
B. at the next scheduled transmission
C. during the next available period
D. at anytime

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单选题

Regarding Cospas-Sarsat in GMDSS, all of the followings are correct expect _________.

A. EPIRBs are units that are used as alerting devices.
B. There are satellites in a low-earth polar orbit that detect EPIRB beacons on 406 Mhz and relay the information to an earth-side Local User Terminal (LUT).
C. The Doppler frequency measurement concept is used to determine the EPIRB's location.
D. It works in 1.6 Ghz band.

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单选题

_________ is the means of initiating the transmission of ship-to-shore distress alerts in MF band.

A. 406 MhzEPIRB.
B. SSAS based on Inmarsat-C satellite
CESs in the Inmarsat geostationary satellite service.
D. MF DSC

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