艏侧推上应安装有刹车以防止航行时螺旋桨和马达发生转动。
The bow thruster to be equipped with a brake to avoid the turning of the propeller and motor during sailing.
根据我国航道条件就现有浅水拖输艏艉线型形状进行了探讨，从阻力和推进观点出发对满载水线、横剖面形状、半进水角和各种坠洞以及它们对螺旋桨的影响等加以分析、比较。
In view of the resistance and propulsion, the load water line, shape of sections, half Angle of entrance, forms of tunnel and their effect on propeller were analysed and compared.
本船为钢质双体船，前倾艏柱，方艉圆舭，艏升高甲板单层露天甲板，双主机双螺旋桨双舵。
This vessel is made of steel, catamaran, fore raked stem, transom stern, round bilge, fore raised deck, single open deck, double main engines, double propellers, double rudders.
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