this ship is seaworthy.

Gregory. Seaworthy has written:

'Nag's Head, or, Two months among \\'

The cast of Seaworthy - 2009 includes: Vladimir Paunovic as Man

The rusty weatherworn ship did not seem seaworthy.

Personally, I think "seaworthy" is a relative term. A sailboat that is seaworthy on a lake might not necessarily be seaworthy crossing the North Atlantic. I know that doesn't help much, but I think it probably boils down to whether or not a sailboat is capable of handling the sea conditions most likely to exist where (and when) you intend to sail.