from The Century Dictionary.

  • noun A diagram containing a curve generated by the motion of a line drawn from a fixed origin, and representing in direction and magnitude the horizontal component of the force of magnetism on a ship's compass-needle while the ship makes a complete circuit.
  • noun A diagram that shows both the horizontal directive magnetic force of the compass-needle on board ship under local influences and its deviation from the meridian for any latitude and sailing-course; specifically, the dygogram of Captain Colongue (1870) and of A. Smith, from which Paugger obtained the idea of his mechanical dromoscope of 1872.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • 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


from Wiktionary, Creative Commons Attribution/Share-Alike License

From dynamic + goniometric + diagram


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  • JM digs dygograms, indeed is quite attracted to them.

    August 18, 2010