"Dave Richardson" wrote in message
om...

He said he had
two scale's - one for each strap on the lift and by adding the two
weight reading's I would know the vessel displacement. It added up to
about 10,000lbs..

Would that be a correct way to weigh a boat? Thank's.

Assuming that the scales were accurate then adding them together would give
you the correct total.

Unless they have made some attempt to verify the calibration I would not
expect the scale to be any more accurate than your bathroom scale. It
should provide a rough estimate, however.

Rod