IEEE
You are not logged in, please sign in to edit > Log in / create account  

Category:Optical telegraphy

From GHN

Revision as of 21:24, 14 January 2013 by Administrator1 (Talk | contribs)
(diff) ← Older revision | Latest revision (diff) | Newer revision → (diff)
Jump to: navigation, search
A replica of the controls on a Prussian Optical Telegraph - Image by Super Bass
A replica of the controls on a Prussian Optical Telegraph - Image by Super Bass

A system of conveying information by visual signals, usually using towers with flags or shutters

Pages in category "Optical telegraphy"

This category contains only the following page.

C

Media in category "Optical telegraphy"

This category contains only the following file.