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
- Electromagnetic log
- Pitot tube
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.