Hull insurance is mainly a property insurance covering loss of, or damage to a ship owner´s vessels and their equipment. Hull insurance often includes collision liability insurance as well, covering the ship owner´s liability for damage to other vessels and their cargoes resulting from a collision.
Vessel in navigation status - Since an individual must have an employment-related connection to a vessel or identifiable fleet of vessels in navigation to qualify as a Jones Act seaman, what qualifies as a "vessel in navigation" is a crucial issue. The term "vessel" has been broadly defined to include any kind of watercraft or equipment capable of being used for transportation on navigable waters. In addition to the usual craft found upon rivers, lakes, and oceans, the following have been found to be vessels even though they lack motive power: houseboats, rafts, dredging barges, floating cranes, floating derricks, drilling barges, jack-up drilling rigs, and submersible or semi-submersible rigs. The controlling factors in determining whether a craft is a "vessel" are the purpose for which it was constructed and the business in which it is engaged.
A vessel is considered to be "in navigation" when it is engaged as an instrument of commerce or in transportation on navigable waters. The term is construed liberally. Consequently, vessels which are in port or under repair are still considered "in navigation" as are certain vessels which are stationary, moored, or fixed in place. For example, a jack-up drilling rig on location is still considered to be "in navigation" even though it is not moving. However, a vessel which is under construction and still undergoing sea trials is not yet "in navigation" for Jones Act purposes.