unseaworthiness

adjective, sea·wor·thi·er, sea·wor·thi·est. (of a vessel)

1. constructed, outfitted, manned, and in all respects fitted for a voyage at sea.
2. safe for a voyage at sea.

adjective

1. in a fit condition or ready for a sea voyage

adj.1807, “in fit condition to encounter heavy weather at sea,” from sea + worthy. Related: Seaworthiness. Old English had særof “hardy at sea.”