It's like the question of when they go from being a boat to a ship.
There are some commonly agreed on displacement length numbers but they
shift with time and fashion. The scandalously light of fifty years
ago would be a heavy tank today. Where will it ever end?

--

Roger Long



"Dale" wrote in message
.net...
When does a boat go from being light displacement to medium
displacement to heavy? What delineates them? Is it based on the
weight, D/L, SA/D, etc. or some combination of these?

Thanks.