(Difference between revisions)
m (New page: IEEE GHN Category Category:Telegraphy)
|(One intermediate revision by one user not shown)|
|Line 1:||Line 1:|
Latest revision as of 21:25, 14 January 2013
A kind of optical telegraphy in which information is communicated through towers with moving moving arms whose position expresses symbols, today can also refer to flag semaphore systems
Media in category "Semaphore telegraphs"
This category contains only the following file.
- Semaphore Telegraphs...