Thanks. There is another 'experimental device' that is more human friendly to send light data between ships, still looking for it. <sigh> Here is one example of low volume signal lamp data transfer with decoder - even for furriners.
Office of Naval Research Set to Upgrade the 200-Year-Old Signal Lamp for Modern Stealth Communication (usni.org)
Text Tech: Can Navy Vessels Use Shipboard Signal Lamps for Text Messaging? > United States Navy > News Stories
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