seaworthy

This term is primarily a technical and legal designation used in maritime law and shipping. It describes a vessel that is fit for its intended voyage, meaning it is structurally sound, properly equipped, and manned by a competent crew. While it can be used colloquially to describe any boat that is safe to sail, its primary weight lies in insurance and contractual obligations where "unseaworthiness" can void a policy or lead to liability.

In a figurative sense, the word is occasionally used to describe a person or a plan as being robust enough to withstand harsh conditions or "rough seas." However, this usage is rare compared to its literal application in nautical contexts.