Originally Posted by dobra##
He is going to hire a trailor which will be suitable for the boat .......
I have no idea of the weight of the boat and he is guesing as well.
how is he going to hire a suitable trailer if he doesn't know its weight?
If it is afloat you could probably get a reasonable guess on the weight by approximating the shape.
The mass of the boat = the mass of water it displaces.
The mass of water it displaces in metric tonnes = the volume in m3 (in fresh water - but near enough in salt).
So 23ft long = 7m, 8ft beam = 2.4m
If the draft is 1m and you think the hull shape is reasonably V - so "prism like" then the volume would be:
1/2 * beam * draft * length
1/2 * 2.4 (m) * 1 (m) * 7 (m) = 8.4 m3 = 8.4 tonnes...
Now I might have overestimated the draft, and the shape factor might be wrong, but I can't see it being so far out that its less than 3.5 tonnes with the weight of a serious trailer in there.