Quote Originally Posted by Conachair View Post
In broader terms with navigation I find it best to treat every last piece of info with a fair degree of caution. Even Mk1 eyeball is not to be trusted.
this is wise.

Worse still:

We get lead line data from the 1920's.
We send the data to a factory in italy.
A worker on minimum wage who has probably never seen a boat transposes said data into a puter.
We pay 300 quid+ for the data so don't like to consider its provenance.
We then load it into a chart plotter that lets us see the whole thing in 3D.

Look I can SEE the boat fits between those rocks.........