dygogram
Noun. (nautical) A chart showing the horizontal variation in the magnetic force acting on a ship's compass needle by the iron within the ship, as a function of course steered.This is an unmodified, but possibly outdated, definition from Wiktionary and used here under the Creative Commons license. Wiktionary is a great resource. If you like it too, please donate to Wikimedia.
This entry was last updated on RefTopia from its source on 3/20/2012.