单项选择题
A.Channel 6 DSC
B.Channel 6 Radiotelephony
C.Channel 13 Radiotelephony and channel 16 DSC
D.Channel 70 DSC
单项选择题 Where the master has not disclosed to the suppliers of necessaries that under an existing time-charter the Charterer is liable for the particular disbursements in question,()will be liable to such suppliers to that extent.
单项选择题 Where advance freight is agreed upon,payment does not depend on delivery and must be made ()the ship is lost and the cargo never delivered.
单项选择题 What does the DSC control unit do if the GMDSS radio operator fails to insert updated information when initiating a DSC distress alert().