Pit sword

The pit sword (also known as a rodmeter) is a blade of metal or plastic that extends into the water beneath the hull of a ship.[1] It is part of the pitometer log, a device for measuring the ship's speed through the water.

See also

References

"Underwater Log Systems". USS Bowfin Submarine Museum & Park. 2002. Archived from the original on 2006-08-25. Retrieved 2006-08-26.

External links

Historical site with information on US Navy submarine pitometer log systems during World War II. This site shows the pit sword or rodmeter as it is deployed.

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