Topic: Dates of SI introduction to market

[rnvinc]

Can someone give me the "approximate" year dates of the following...:

*First working SI technology developed and used (was it military? commercial? consumer?)
*First Humminbird SI introduction to consumers
*First Humminbird DI introduction to consumers...(DI from SI data)
*First Humminbird DI introduction to consumers...(Dedicated DI units)

Rickie

[RGecy]

Great info on Wikipedia. http://en.m.wikipedia.org/wiki/Side-scan_sonar

Military first made in 1950's
First commercial SSS 1963
Humminbird 2005
Down imaging 2009
Dedicated DI units in 2011

Robert

[rnvinc]

Thanks Robert...

Rickie