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To sum up the testing Les will soon be involved in, let me first describe our simple broadband communications set up so that you understand that which we are attempting. Our electronic enclosure contains two seperate amplification channels. The electronics for each channel are exactly identical so that each channel can perform the other channels task. (Nice feature to have when things go bad) A passive hydrophone (HBH-2) is connected to the upper or "A" channel and this signal passes thru a normally closed set of contacts in a cb styled handset. The output is applied to either a headset or a wall mounted speaker. When the press-to-talk thumbswitch on the handset is keyed, a normally closed set of contacts opens and terminates this hydrophone signal from reaching the channel "A" amplifier channels input. This also closes a normally open contact that allows for a complete circuit for the handsets internal microphone to be connected to channel "B"s amplifier circuits. A broadband voice message is conveyed out thru a thru hull connection to an underwater speaker. Once this message is finished and the thumbswitch is released, the transmit (channel "b") is terminated and the passive hydrophone input on channel "A" is reestablished so as to listen for the returning reply. The unit that was just mailed is the second completed passive sonar/underwater communications console to be sent to Les. It is with these two units that He will test for the range, clarity of transmitted signal, and ease of use of the consoles themselves. In short, It is our attempt to provide submariners a relatively inexpensive means of communication for use between two submarines or between submarines and surface support vessels. During periods of no voice "coms", a plug has been provided that will allow the use of a second hydrophone in the "B" or transmit channel so that two hydrophones (each positioned on each side of the boat) can be monitored at the same time with independant wall mounted speakers also so positioned.) This simple broadband system is surface independant and does not rely but on bearings relative to the vessel upon which it is mounted. In short, No I do not feel this system would be adaptable to your bouy that gives GPS data. It is a collision avoidance tool and underwater communications device. Your system does sound very interesting though. David Bartsch Windows Live™ Hotmail®…more than just e-mail. See how it works. |