Of or with respect to a ship or vessels, their construction, gear, management, or use; especially, of or regarding a navy: since, naval structure; a naval victory; a naval force; a naval station or medical center; naval stores.
having a navy: because, a naval power.
In the United States, an officer of the Treasury Department who, during the larger maritime harbors, is associated with the collector of customs. He helps in estimating obligations, countersigns all licenses, clearances, certificates, etc., issued because of the enthusiast, and examines and certifies their reports. When you look at the American colonies prior to the Revolution the naval officer was the administrator associated with the Navigation Act.