你可能感興趣的試題

If a ship station relays a DSC distress call to an appropriate coast station, it means that（）.

A.the ship has received the DSC distress call on a HF frequency
B.the coast station concerned has not acknowledged it within 5 minutes
C.the ship will take command of search and rescue in 5 minutes
D.A and B

單項(xiàng)選擇題

After has permit the commissioning, the（）will permit the SES access to system.

A.INMARSAT
B.IMO
C.MSC
D.CES