Pit sword

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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 nautical vessel. ^[1] It is part of the pitometer log, a device for measuring the ship's speed through the water.

[edit] See also

• Commercial web site showing a typical pitometer log system.
• 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.

[edit] References

1. ^ Underwater Log Systems (HTML). USS Bowfin Submarine Museum & Park (2002). Retrieved on 2006-08-26.