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Published online by Cambridge University Press: 18 January 2010
The publication by the Hydrographic Department on 4 February 1972 of 23 new metric charts of the south-west coast of England was announced in Notice to Mariners 264 of 1972. This is a significant first step towards the metrication of all charts of the British Isles of which there are about 400, a programme that should be complete before 1980. The block areas with tentative dates for completion are shown in Fig. 1.