Blue wavelength light penetrates water especially well. The United States's Defense Advanced Research Projects Agency (DARPA) tried to develop blue laser communication links to submarines around 1980, but failed due to inefficienciies of lasers available at the time.
Seawater not only cloaks submarines, it also complicates communications with our own. Reaching submerged subs has required giant transmitters sending very low-frequency radio waves with limited data transmission speeds, or ad hoc methods like this one
that we first described in November 2007
Deep Siren is designed to deliver communications using acoustic, expendable buoys that, when contacted via a communications satellite in the National Security Agency's Global Information Grid, can send and receive messages to and from submerged subs as far as 175 miles (240 kilometers) away depending upon acoustic propagation conditions. - Scientific American, Navy Mulls New Way to Enhance, Hide Submarine Communications, January 18, 2008.
Although every link made in the preceeding post has since been 'wiped clean', that may actually be a sign of ongoing success and required secrecy. DARPA seems still interested in pushing
blue (actually blue-green) submarine laser communications technology for ASW operations.
Perhaps some readers have noted that one method available for clandestine government agencies to hide in plain sight is to obfuscate (to confuse and make obscure) facts which may otherwise be public information in an open-internet society with identical keywords having no relevance whatever. Submarine facts, which are always silent and strange, are obfuscated by ample, ambiguous references to the color Yellow (as in the Beatles song about a sub).
Submarine news lately has also been infiltrated by women and females. This can easily be filtered out, but these examples are intended only to illustrate how obfuscation works in a never-ending fashion that is open to manipulation by government agencies, political organizations, advertisers, etc.
Sticking with the color blue in connection with submarines, we find lately on July 2, 2010, two articles unrelated to each other or to DARPA.
1- Friday, July 02, 2010 - Journal Register berksmontnew.com, Lanterns shine light on truth -
“We tested both a clear lens and a blue lens lantern. Both lanterns were visible with the naked eye at a distance of 1,100 feet.” This proved that the victory lantern could be spotted after the Hunley sunk the USS Housatonic in 1864, disproving some critics who believed it was not possible.
2- Friday, July 02, 2010 - Sacramento Press, The Submarines @ Blue Lamp
If you don't recognize the band name, you would certainly recognize the music. Their songs have been featured in Nip/Tuck, Weeds, Grey's Anatomy, Gossip Girl, and in maybe the most well-known placement, the songs "You, Me and the Bourgeoisie" and "Submarine Symphonika" were used in Apple commercials for the iPhone 3G and iPhone 3GS.
Submarines are always silent and strange.
Labels: DARPA TRITON Blue Laser Blue Lantern Blue Lamp