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Nautical Publications
France West Coast
This atlas contains two sets of 13 charts showing tidal streams at hourly intervals commencing 6 hours before HW Brest and ending 6 hours after HW Brest. The times of HW Brest and other details of the prediction for this port are given in NP202, Admiralty Tide Tables Vol.2, which is published annually. NP202 also gives tidal predictions for a number of ports and tidal stations in the area covered by this atlas.
On the charts the directions of the tidal streams are shown by arrows which are graded in weight and, where possible, in length to indicate the approximate rate of the tidal stream. thus -> indicates a weak stream and --> indicates a strong stream.
The figures against the arrows give the mean neap and spring rates in tenths of a knot, thus: 19,34 indicates a mean neap rate of 1.9 knots and a mean spring rate of 3.4 knots. The comma indicates the approximate position at which the observations were obtained.
