I have over the years worked on Hundreds of boats and most have a wooden plaque .
I still do not know what it all means.
Even though I have worked for some large boat builders I have never seen the sign fitted.
I guess there one of the last items fitted before they are sold...
I am sure the bottom line refures to the length .
But what does the top line relate to ??
And what does
O.N. Mean ?