CER (Character Error Rate/Ratio) : The CER, an indication of the radio signal reception property can also be added to the NAVTEX message. Usually it is added as text in the line before ZCZC indicator.
CES means a Coast Earth Station working within the Inmarsat Network providing the connection between Inmarsat mobile users to other Inmarsat mobile users or the the landbased communication network. These stations are also called LES meaning Land Earth Stations.
Coast Guard - A coast guard is a national organization responsible for various services at sea. However the term implies widely different responsibilities in different countries. In most countries is concerned with SAR (for example in the UK).
Space System for the Search of Vessels in Distress
Coast Radio Station - They are a maritime radio stations situated on shore which monitors radio distress frequencies, coordinate the radio traffic and relays ship-to-ship and ship-to-land communications. Some of CRSs are categorised as MRCCs or MRSCs or NAVTEX CRSs.