The concept of NAVTEX is of a（）system for the broadcast and receipt of MSI.

单项选择题The broadcast of MSI is made on two dedicated systems. “dedicated” means（）.

A.special
B.different
C.expensive
D.valuable

单项选择题A SART can be fixed on（）.

A.a mother ship
B.a lifeboat
C.a life craft
D.all of A,B,C

单项选择题All stations which receive a distress alert shall immediately cease（）.

A.any transmission
B.any harmful transmission
C.to use radiotelephone
D.using radiotelephone

单项选择题When receiving a distress alert, the SAR authorities ashore and the ships in the vicinity of the ship in distress will（）soonest.

A.reach the distress area
B.conduct a sector search
C.send rescue vessels
D.assist coordinately in SAR operation

单项选择题In the GMDSS, distress alerting can be transmitted in（）directions.

A.1
B.2
C.3
D.4