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Day Skipper - Part 6
- Tidal stream atlas
 Another
source of tidal stream information is tidal stream atlases. These can
be stand-alone booklets, or in some cases they are incorporated into the
land area on charts or included in almanacs. They give a simple line drawing
of the appropriate area, with the tidal steam shown by arrows and two
tidal speeds for each of the six hours before and after high water related
to an adjacent port.
Tidal stream atlases are divided into a different page or drawing for
each of the six hours before and after high water.
Tidal streams are given in the format "05,10", which indicates 0.5 of
a knot during neap tides and 1.0 knot during spring tides. If between
neaps and springs . . . interpolate!
The one point to remember about tidal information is that it is only
a prediction and that tidal heights and times can easily be affected by
strong winds, higher or lower pressure areas than normal, and other anomalies
of the weather.
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