單項選擇題The quality of the message can be affected by（）.

A.climate
B.sunshine
C.human beings
D.both a and b


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1.單項選擇題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 DSC

2.單項選擇題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 sea

3.單項選擇題IMO has decided that all ships over 300TGt must be fitted with a NAVTEX receiver（）.

A.by 01 Feb 1992
B.by 01 Aug 1993
C.between 01 Feb 1992 and 01 Feb 1999
D.before 01 Feb 1992

4.單項選擇題You are signing on a deck officer，who will be designated as one of the GMDSS operators，before sailing foreign．Which statement is TRUE（）.

A.He/she must have an STCW certificate endorsed as“Valid for Service on Vessels Operating in the GMDSS System”
B.He/she must present either an FCC-issued license or a Coast Guard-issued license
C.You must consult the“List of Qualifications”on the reverse of his/her FCC-issued license
D.His/her Merchant Mariners Document must have an added endorsement as “Radio Electronics Officer”

5.單項選擇題Which statement is TRUE（）.

A.Key letters or abbreviations may not be used in GMDSS radio logbooks under any circumstance
B.Urgent communications do not need to be entered in the GMDSS radio log
C.Both of the above
D.None of the above