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bow thruster 船首推進器

A bow thruster or stern thruster is a transversal propulsion device built into, or mounted to, either the bow or stern, of a ship or boat, to make it more maneuverable. Bow thrusters make docking easier, since they allow the captain to turn the vessel to port or starboard side, without using the main propulsion mechanism which requires some forward motion for turning. A stern thruster is of the same principle, fitted at the stern. Large ships might have multiple bow thrusters and stern thrusters.

資料來源:維基百科

船首推進器或船尾推進器是一種橫向推進的設備, 安裝在船首或船尾, 讓船更機動. 船首推進器可以讓停泊港口更容易, 因為它允許船長不需要使用主要推進器也可以讓船左右轉向(使用主要推進器還需要一邊前進才能一邊轉向). 船尾推進器也是一樣的原理. 越大的船需要越多的船首跟船尾推進器.