Quote:
Originally Posted by swaghauler
Even 1990's recreational/noncommercial DEPTH FINDERS (the universal recreational name for fish finders) were FAR SUPERIOR to 1950's MILITARY SONAR. The only difference between commercial and recreational depth finders is the software in them (from the mid 90's on anyway).
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Which I assumed right away........ I don't think it is until the 1970's (my example) that integrated a computer to run filters and make full use of a hydrophones sensitivity. The 40's and 50's are vaccuum tube systems with transistors only making units smaller, but not more efficient to the best of my limited knowledge.
Are the displays on these commercial systems even large enough to do Anti submarine or counter sabotage (anti-diver) operations without a penalty for the operator? Do they have variable modes and systems to screen out some or most noise?