To meet Pauls exacting standards, the deck section needs to be as flat as a billiard table!
So the flat board is being used as a sort of " Engineers Surface Plate"
Whereby the top deck surface will be sanded down to match the flatness of the board
In workshops, Engineers apply "Blue" to the surface plate and rub it onto the surface being scraped level
Then scrape off the blue…..This is done many times, until the surface is dead flat….Happy Days!
Spirit level is resting on the stern datum surface and is used as a "Sighter"……To check parallelism with the board
Apologies for the lecture, but some members may find this process interesting?
Bob
