RE: [PSUBS-MAILIST] Baudot's code underwater communication system?

Brent,

We have already hashed this out; Morse Code is really impractical for our situation. Besides you will not be able to find anyone who knows it anymore. It has been dropped as a requirement use (better methods of communication available) and Ham radio operators no longer have to memorize it for licensing. You are welcome to install it in your sub but who will you have to communicate with you over the soft TTD system as no one else will have it installed. Nice concept but doesn’t fit well with the size of our subs (unless you are getting Ian’s model).

R/J²

Respectfully,

Jay K. Jeffries

Andros Is., Bahamas

As scarce as the truth is, the supply has always been in excess of the demand.

-Josh Billings

From: owner-personal_submersibles@psubs.org [mailto:owner-personal_submersibles@psubs.org] On Behalf Of Brent Hartwig
Sent: Sunday, January 18, 2009 5:25 PM
To: PSUBSorg
Subject: RE: [PSUBS-MAILIST] Baudot's code underwater communication system?

Hi Thierry,

I think you might of found the link we were missing. That soft TTD system is very interesting. I hope this group can figure out a good Morse Code unit. That is one of they types of communication systems I want on my subs and support boats. I'll have to order a pair of those units and try them out.

Regards,
Szybowski

From: cheneharmonieux@hotmail.com
To: personal_submersibles@psubs.org
Subject: [PSUBS-MAILIST] Baudot's code underwater communication system?
Date: Sun, 18 Jan 2009 14:10:08 +0000

Hi everybody,

On my side, I was reading the mailing list archives while a saw a conversation on last February about underwater communication system using Morse code. As a scout, I've been interrested because we do use it in games. But as a professionnal, I'm a sign language translator for deaf persons and my wife is deaf herself. Perhaps you know about deaf community, the point is that a tele-typeywriter(tty) is using Baudot code (http://en.wikipedia.org/wiki/Baudot_code) So I asked myself if we could use a TTY/TDD as a single or dual frequency transmission. It could have greater range than plain broadband, according to David.

Physically, the transmitter/receiver (the TTY itself) do already exist and using it in underwater communication could be and interresting application of that. There's also softwares that convert any computer into a TTY... In fact two ingeneers from Quebec built a system called SoftTDD and I do use it at home so my computer became a TTY but at a really cheaper price (325$ CAN.) Have a look at http://www.auristar.com/en/ . I have also read about CallTTY/TDD software 2.0. but I dont know about it...

Well, I should buy "Electronic for dummies" and start working on that, but I share with you this idea wishing it could works and interrest someone! What is your opinion?

Thierry Labonté
Montreal Trident Sea Scouts