DICTIONARY OF

Waterborne 379 Wave Guide
Waterborne. Floating. 2. Carried by water.
Water Breaker. Small cask used for carrying drinking water in a boat.
Water Laid. Said of rope laid up left-handed. Sometimes applied to cable-laid rope.
Waterline. That line in which the surface of the water meets the ship's side at a specific
draught. 2. Line painted round ship's side at approximate position of her load waterline.
Waterlogged. State of a vessel that has taken in so much water that she floats by the
buoyancy of her fabric and her contents.
Waterplane. That horizontal section of a ship's hull which represents her shape in the water
in that particular horizontal plane.
Water Sail.* Fine weather sail that was formerly set beneath a lower studdingsail in fine
weather.
Water Splice. Cut splice in which the two parts between the splices are twined round each
other before tucking the second splice.
Waterspout. A whirling up-current of warm, moist air, the outside of which is cooled and
cloudlike. Height may be anything between 20 and some thousand of feet, width being from
20 to 500 ft. Caused by instability in atmosphere. Occurs in temperate zone, but mostly in
tropical zones. They last for 10 to 30 minutes. When they break they may throw down heavy
masses of water and, perhaps, ice. Gunfire does not affect them.
Watertight. Impervious to water.
Watertight Doors. Steel door so fitted and strengthened that it will prevent water passing
when door is sealed.
Watertight Hatch. Hatch so fitted and strengthened that it will prevent water passing when
hatch is closed and secured.
Watertight Sub-division. The dividing of a vessel into small compartments fitted with
watertight doors and hatches so that, in case of damage, the inflow of water will be arrested
and localized.
Water-tube Boiler. One in which the water is confined to numerous small tubes that pass
through the heat from the furnaces. Its great advantage lies in these tubes being able to
support pressures far above those possible in Scotch and other cylindrical boilers. A further
advantage is that considerable less weight of water is necessary. They require very careful
tending. There are numerous types, some working at extremely high pressures.
Waterways. Channels along ship's sides on deck, into which water runs and is carried to
scuppers.
Watt. Electrical unit of power, equivalent to one ampere at one volt. 746 watts per minute is
equivalent to one horsepower.
Wave. A perpendicular oscillation in the surface of a liquid. An undulation, of surface of a
liquid, that appears to be progressive but, actually, is not.
Wave Guide. A copper tube of rectangular section which conveys signals between a radar
transmitter-receiver and scanner.
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