Just a minor point at 04.43 scales refer to "height of water" they refer to height of tide, to which we add Chart Datum at a particular point on the chart to find actual depth.
@robthorpe116 жыл бұрын
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@radbcc11 жыл бұрын
Very clear, nice job by Jon....
@darthkek19533 жыл бұрын
Do modern chart-plotters have tidal estimations in them too?