| 摘要 |
A trolley carrying the seine-hauling power block can be driven along an elongated track having its length extending athwartships of a boat. A carriage supporting such athwartships track can be driven along a fore-and-aft boom and the block trolley can be driven along the athwartships track so as to lay the seine back and forth in a pile below the block as it is hauled in. The athwartships track may include two quadrants having inboard ends parallel to each other and to the boom or such track may be straight. If the athwartships track includes two quadrants, the boom carriage carries a transfer track section which can be placed in registry with the inboard end of either arcuate track section by shifting such arcuate track sections transversely of the boom. Rollers mounted for engagement by a seine being hauled by the power block can guide and deter billowing of the seine.
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