GMDSS 英语阅读 500 题单项选择题一第三部份 英语阅读单项选择题1. IMO has decided that all ships over 300TGt must be fitted with a NAVTEX receiver ______ .A. by 01 Feb 1992 B. by 01 Aug 1993C. between 01 Feb 1992 and 01 Feb 1999 D. before 01 Feb 19922. GMDSS is to provide ______ with reliable communication .A. all large passenger vessels B. freighters of more than 300gt in coastal waters C. all passenger ships and cargo ships engaged in international-voyages D. all passenger ships and cargo ships of 300gt upwards in open sea3. The complying vessels can transmit ship-to-shore distress alerts by at least ______ .A. One means, whether satellite or terrestrial techniques B. Two means, whether satellite or terrestrial techniques C. Two separate and independent means, each using different radio communication services D. Two means, such as MF DSC and HF DSC4. The quality of the message can be affected by ______ .A. climate B. sunshine C. human beings D. both a and b 5. Within the polar areas it is ______ to see a satellite in geo-stationary orbit .A. impossible B. possible C. easy D. difficult6. The Inmarsat system is open for use by ______ countries on a non-discriminatory basis .A. some B. lots of C. many D. all7. With the help of GMDSS ______ can be alerted to a distress incident as soon as possible .A. all ships in a large sea area B. only the sea authorities ashoreC. the SAR units ashore and at sea D. the port radios and the coast stations8. In areas covered by Inmarsat HF can be used as an ______ to satellite communications.A. alternation B. alternate C. alter D. alternative9. When receiving a distress alert, the SAR authorities ashore and the ships in the vicinity of the ship in...
