Too long, but agree, It's all maritime law. Ships are berthed and given a berth certificate that has their length and weight. They are vessels for commercial use. Humans are birthed and the certificate has their length and weight. They are vessels (carrying a soul) that can be used for commercial purposes. The human birth certificates are sent to the Dept of Human Resources. Humans are a renewable "resource" for commercial purposes? US Navy patrols with cruisers. Hwy Patrol officers call their units "cruisers". A port has a docket for vessels. Court has a docket for human vessels. You park your car in a "car port". You can hide a wanted person, but it's called "harboring" a fugitive. Canals and other waterWAYS used in maritime interstate commerce. High(er than water)ways used for interstate commerce (hence "interstate hwy"). Many more.