Nautical words

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Visible Horizon. The boundary of Earth's visible surface at the position of an observer. The circle in which it appears to meet the sky is below the sensible and rational horizons by an amount depending on height of observer's eye above sea level,

Voith Schneider Propulsion. The engine shaft passes vertically through the bottom of the hull and rotates a wheel to which paddles or blades are attached at right angles to the wheel. The attitude of the paddles, controlled from the bridge, can be changed to direct their thrust and the vessel is highly manoeuvr­able.

Voltmeter. Instrument for measuring and indicating the voltage, or electro-motive force, of an electrical current.

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