The radiocommunications equipment required for the system
is that defined in the GMDSS for Sea Area A1.
The ship reports can be made by voice on VHF radio using
Ch 13 (GRIS NEZ TRAFFIC) or Ch 11 (DOVER COASTGUARD).
Ship reports to DOVER COASTGUARD can alternatively be made
by automatic ship-identification transponder, where available, using
a suitably adapted DSC facility on VHF Ch 70, or equipment conforming
to the standards adopted for the Universal AIS Transponder.
Confidential information may be transmitted by other means.