Optical telegraph
From Free net encyclopedia
(Difference between revisions)
| Revision as of 08:59, 20 April 2006 Securiger (Talk | contribs) cat, stub ← Previous diff |
Current revision Securiger (Talk | contribs) cat, stub |
Current revision
Optical telegraph refers to a system of telecomunication using visual means of transmition. Types of systems include Semaphore, Aldis lamps, Heliograph, Ships flags and Smoke signals.