Posted by Andrew Craig-Bennett on December 08, 2002 at 21:30:49 from 195.93.33.13 user ACB.
In Reply to: Re: Sorry, forgot one! (was Tonnage) posted by John Lambert on December 06, 2002 at 17:53:51:
Thames Tonnage was developed in 1854, not the 1840's, and the formula should be:
(L-B) x B x 1/2B
________________ = Tonnage
94
So, (27-9) x 9 x 4.5
________________ = 7.75 tons
94
I have buried my copy of the Riddle at the bottom of a pile, in moving house, but the Thames Tonnage of "Dulcie" ought to be around 9, and her Nett Register tonnage would be quite a bit less. My own boat has a Thames Tonnage of 12 and a Nett Register tonnage of 6.69.
They would have been using either Thames tonnage or Nett Register tonnage. Builder's Old Measurement was not used for yachts after the 1860's.