CNIS is designed with sufficient system redundancy to cope
with normal equipment failure. Radars have dual transmitter/receivers
controlled either from MRCC DOVER or the radar site. Radiocommunications
are controlled at the MRCC. In the event of a failure there, each
transmitter/receiver can be operated from the radar site. Limited
coverage can also be achieved using emergency 25W transceivers, or
5W portable radios at DOVER COASTGUARD. If CNIS operations are jeopardised
at either DOVER COASTGUARD or GRIS NEZ TRAFFIC, then the other site
can assume total control.