Originally Posted by macwester26
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 ?
The top line looks like a call signal ON 309561
The second line is the tonnage (not the displacement)
RT (register ton) also abbreviated GRT
One register ton = 100 cubic feet
You cant fit this until the boat have been measured and registered.
In Norway this number (and tonnage if measured) have to be permanently marked on the boat/ship