| 摘要 |
A readily alterable arrangement, to suit the need at sea and in coastal inlet passages for control and disposition of vessels, comprises: pulled barges outfitted with a condition responsive linkage mechanism for implementing a rudder, towlines conveying propulsive force to barges, and tugs continually employed in tow or exchange of barges being loaded/unloaded in the interim of tug port calls. The linkage mechanism, dependent upon a pivotal beam mounted forwardly of the barge mass center, imparts propulsive force on the longitudinal centerline or at either barge side as transmitted to the pivotal beam ends by a bridle leg arranged towline terminal. Alternative assemblies comprise: coupled bridle legs by a flounder plate for a single towline to effect automatic barge control at sea, connection of bridle legs as separated extensions for dual towlines adjustably lengthened for selective control of barge rudders in sheltered waters and employing duel towlines for double tow of barges automatically controlled at sea. The arrangements also comprise a system to effect changes from one to two towlines, a system to interchange barges and a system to back and moor barges-all to provide an operative arrangement adjusted to the sequence of encounters to complete a voyage.
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