4. Jurisdiction.—
a. The Ship.—
According to the maritime law of the United States the ship is not within the jurisdiction of the admiralty until she is completed; while she is engaged in commerce and navigation, that jurisdiction is exclusive; when she becomes a wreck and passes out of the business for which she was intended, the jurisdiction relaxes and is finally withdrawn. Therefore our admiralty does not take cognizance of matters growing out of the building of the ship nor of the controversies arising after she is broken up.
It sometimes becomes a question of some difficulty whether a particular object is or is not a vessel and subject to admiralty jurisdiction. Rev. Stat., § 3, define "vessel" as including "every description of watercraft or other artificial contrivance, used or capable of being used as a means of transportation by water," and in General Cass, 1 Brown Adm. 334, it was said:
The true criterion by which to determine whether any watercraft or vessel is subject to admiralty jurisdiction is the business or employment for which it is intended, or is susceptible of being used, or in which it is actually engaged, rather than size, form, capacity or means of propulsion.
In one or two old cases it was held that a dredge was not a ship but the preponderance of authority is to the effect that a dredge is a ship and within admiralty jurisdiction. The question whether a raft of logs is a vessel has been variously decided. If it be a mere pile or series of floating logs it is probably not a vessel, but rafts made of cross-ties, used as a convenient mode of bringing them to market, manned by crew, who lived thereon during the voyage and propelled by the current and by poles and oars, have been held to be a ship and subject to admiralty jurisdiction.[1] So, also, a floating bathhouse, not permanently moored, but which was towed from place to place has been held to be a vessel; whereas a floating drydock, kept permanently moored, is not a vessel. The question whether barges and floats are subject to admiralty jurisdiction has been the subject of frequent adjudication, and while some old cases held that they were not, the tendency of the modern decisions is to hold that such crafts are vessels. In the Mac, 7 P. D. 126, the question was whether a hopper barge was a ship. It was decided in the affirmative by the English Court of Appeal, Lord Justice Brett saying:
The words "ship" and "boat" are used; but it seems plain to me that the word "ship" is not used in the technical sense as denoting a vessel of a particular rig. In popular language ships are of different kinds; barques, brigs, schooners, sloops, cutters. The word includes anything floating in or upon the water, built in a particular form, and used for a particular purpose. In this case the vessel, if she may be so called, was built for a particular purpose; she was built as a hopper-barge; she has no motive power, no means of progression within herself. Towing alone will not conduct her; she must have a rudder; and, therefore, she must have men on board to steer her. Barges are vessels in a certain sense; and, as the word "ship" is not used in a strictly nautical meaning, but is used in a popular meaning, I think that this hopper-barge is a "ship".... This hopper-barge is used for carrying men and mud; she is used in navigation; for to dredge up and carry away mud and gravel is an act done for the purposes of navigation. Suppose that a saloon-barge, capable of carrying 200 persons, is towed down the river Mersey in order to put passengers on board of vessels lying at its mouth; she would be used for the purposes of navigation, and I think it equally true that the hopper-barge was used in navigation.
b. The Waters.—
The waters included in admiralty jurisdiction are, first, the sea; second, streams in which the tide ebbs and flows; and third, waters which carry substantial water-borne commerce. The fact that a navigable stream may lie entirely within the borders of a single state and thus be unnavigable for interstate commerce, does not exclude the admiralty jurisdiction. Nice questions occasionally come before the courts in determining whether or not a particular body of water is navigable and therefore within the admiralty jurisdiction. There seems to be no precise test, beyond the capacity of the stream to carry substantial commerce.