A message warning of a tropical storm should be sent as a(n)().
A、A.routine message
B、B.urgent message
C、C.distress message
D、D.safety message
A、A.routine message
B、B.urgent message
C、C.distress message
D、D.safety message
A、A.Navigational warnings B、B.Weather warnings C、C.SAR and distress alert information D、D.All of the above
A、Navigational Warnings B、Meteorological Warnings C、Search and Rescue Information D、All of the above
A、error messages only B、disable all messages C、error and warning messages only D、info, error and warning messages
A、a ship is threatened by grave and imminent danger and requests immediate assistance B、a calling station has an urgent message about the safety of a person C、the message following the prefix will be about the safety of navigation D、the message following is a meteorological warning
A、ECDIS warnings and messages B、Hydrographic Office data C、Notice to Mariners information D、All of the above
A、Warnings(severity=4) B、Errors(severity=3) C、notifications(severity=5) D、informational(severity=6)