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.
{{cite web
| url = http://www.bowfin.org/website/bowfin/bowfin_systems/log_sys/log_sys.htm
| title = Underwater Log Systems
| accessdate = 2006-08-26
| date = 2002
| publisher = USS Bowfin Submarine Museum & Park
|archiveurl = https://web.archive.org/web/20060825070849/http://www.bowfin.org/website/bowfin/bowfin_systems/log_sys/log_sys.htm |archivedate = 2006-08-25}} It is part of the pitometer log, a device for measuring the ship's speed through the water.
See also
References
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External links
:*[http://www.maritime.org/doc/fleetsub/log/index.htm 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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