The history of the first 10 years of the Channel Navigation Information Service (CNIS) from its inception in 1972 has been well-documented in Captain Richard Emden's three papers published in the Journal of the Royal Institute of Navigation. While the purpose of this paper is to discuss the period of consolidation following these first 10 years, it is perhaps appropriate to set out briefly the factors leading up to the introduction of CNIS in the Dover Strait, the operating philosophy and some of the major milestones along the way.
