Nautical words



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Sensible Horizon. Plane of celestial sphere that is tangent to Earth at position of an observer: is parallel to his rational horizon, and 4000 miles above it.

Sentinel. Electric apparatus in circuit of a navigation light, and causes a bell to ring if filament of lamp fuses. 2. Apparatus formerly used in surveying vessels. Specially shaped weight was towed over sea-bed by a wire from the stern. When depth varied, angle of wire increased or decreased, and caused the bell to ring.

Separation. The means, or material, by which one parcel of a ship's cargo is separated from another.


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