Ardois system (English, name)
expansion: the Ardois system
Senses:
glosses: A system used by the US Navy in the late 19th century to enable ship-to-ship communications at night. Each installation used a series of eight double lamps (four red and four white) hung from a mast and used to transmit visual codes.
tags: historical
Forms:
form: the Ardois system
tags: canonical