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Tug moves
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Close the ramp, moves, Ferry
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Boat is moving slowly
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Boat control lever
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Steamer moves, propeller noise
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Inside a spaceship, communication signal
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Jamming, The motor boat starts, reverse
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Aft propeller noise, Ocean liner
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Exhaust from a spacecraft maneuvering engine
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The boat moves slowly, the sound of water
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Ferry gets to the docks
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Motor boat will not start
★★★★★