A gravitating instrument for measuring the motion of a ship and thereby assisting the accuracy of her gunnery in regulating horizontal fire.
·noun A body so suspended from a fixed point as to swing freely to and fro by the alternate action o...
Webster's Dictionary of the English Language
An instrument for determining the velocity of projectiles. The original pendulum was of very massive...
The Sailor's Word-Book
See ballistic pendulum. ...
An improved pendulum to facilitate the accurate elevation and depression of guns on board ship, by m...