The boat moves:
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Yacht moves
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The boat moves slowly, the sound of water
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Creaking metal, Metal boat swinging
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Exhaust from a spacecraft maneuvering engine
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Boat is moving slowly
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The drone of the engine of a floating large
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The motor boat starts, expects to jam
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Tug moves
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Start, jamming, Water engine
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The motor boat starts, reverse, jamming
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Engine room on a steamboat ship,
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Inside a spaceship, communication signal
★★★★★