Pit sword
Encyclopedia
The pit sword is a blade
of metal
or plastic
that extends into the water beneath the hull of a nautical vessel.
It is part of the pitometer log
, a device for measuring the ship's speed through the water.
Blade
A blade is that portion of a tool, weapon, or machine with a cutting edge and/or a pointed tip that is designed to cut and/or puncture, stab, slash, chop, slice, thrust, or scrape animate or inanimate surfaces or materials...
of metal
Metal
A metal , is an element, compound, or alloy that is a good conductor of both electricity and heat. Metals are usually malleable and shiny, that is they reflect most of incident light...
or plastic
Plastic
A plastic material is any of a wide range of synthetic or semi-synthetic organic solids used in the manufacture of industrial products. Plastics are typically polymers of high molecular mass, and may contain other substances to improve performance and/or reduce production costs...
that extends into the water beneath the hull of a nautical vessel.
It is part of the pitometer log
Pitometer log
Pitometer logs are devices used to measure a ship's speed relative to the water. They are used on both surface ships and submarines...
, a device for measuring the ship's speed through the water.