Distress messages should first be transmitted on 2182 kHz
It is advisable to follow a distress message on 2182 kHz by two dashes of 10 to 15 seconds duration
If no answer is received on the designated distress frequencies，repeat the distress call on any frequency available
Channel 16 (156.8 MHz) may be used for distress messages
第1题：
Which categories of NAVTEX messages may not be selectively rejected through receiver programming ________．
A.Navigational warnings
B.Weather warnings
C.SAR and distress alert information
D.All of the above
第2题：
Which statement is TRUE ________．
A.GMDSS radio logs are required to contain entries pertaining to all incidents connected to radio communication service which appear to be of importance to the safety of life at sea
B.All distress communications must be entered in the GMDSS radio log．
C.Both of the above
D.None of the above
第3题：
A.A
B.B
C.C
D.D
第4题：
Which statement is true about IBGP routers? （）
第5题：
Which statement about a Service Profile is most accurate?（）
第6题：
What is meant by the term“radio silence”________．
A.Stations not directly involved with the on-going distress communications may not transmit on the distress frequency or channel
B.Stations remaining off the air to safeguard proprietary information
C.Two three-minute silent periods，at 15 and 45 minutes after the hour，that provide a transmitting“window”for distressed vessels to transmit distress alerts using J3E
D.Communications on a distress frequency or channel is banned for 24 hours following the cessation of the distress traffic
第7题：
If you know that the vessel you are about to call on the VHF radio maintains a radio watch on both the working and the calling frequencies, which frequency should you call on ?______.
A.Calling frequency
B.Distress frequency
C.Urgency frequency
D.Working frequency
第8题：
A. They must be fully meshed
B. They can be in a different AS
C . They do not need to be directly connected
D. They must be directly connected
第9题：
Which three statements are true about terms in a policy?（）
第10题：
Which statement about SNMP is true？（）