Plymouth (Devonport) Tide Curve


Yes, and no!
The reason why i'm looking for the curve or graph for Devonport is I have been asked to teach someone the traditional way of finding an accurate time of touching the bottom when drying out against a wall.
They are also swotting for a YM and want to compare the calculations against real results, using the local graph.
 
Rule of twelfths is pretty accurate when no access to actual curves. But obviously not for ports with double high waters etc. But that doesn't apply to Plymouth.
 
Ask Sarabande. His mooring's access pontoon, at the corner of the Tamar/Lynher Rivers, quite regularly goes aground, just before the time he wants to use it.....
 
Ask Sarabande. His mooring's access pontoon, at the corner of the Tamar/Lynher Rivers, quite regularly goes aground, just before the time he wants to use it.....

That's really close to my mooring! My mooring is just across the other side of the Tamar next to Bull Point.
 
Yes, and no!
The reason why i'm looking for the curve or graph for Devonport is I have been asked to teach someone the traditional way of finding an accurate time of touching the bottom when drying out against a wall.
They are also swotting for a YM and want to compare the calculations against real results, using the local graph.

First thing is that the Devonport data is for the tide gauge at Devonport, not 1/2 mile up or down the river.
Here's real and predicted for Devonport:
https://www.ntslf.org/data/realtime?port=Plymouth
Historic data can be seen by clicking on 'custom dates'.
HTH?
 
There's quite a difference in time as you head up the river. The important thing for his YM is to be aware of that. When it turns also depends on how much rain there is coming down the river. I did my YM many years ago partly up the Tamar and after flooding on Dartmoor.
 
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