The Channel Navigation Information Service (CNIS) has radar,
an Information Processing and Retrieval System (IPRS), access to the
United Kingdom's HM Coastguard operational radiocommunications VHF
Direction Finding (DF), radio VHF Digital Selective Calling (DSC),
and Automatic Identification System (AIS) facilities. CNIS supports
the primary responsibilities of preserving safety of life at sea and
co-ordinating responses to incidents.