Re: [PSUBS-MAILIST] Emergency tapping code...

[Ray Keefer <Ray.Keefer@Sun.COM>]

Hi Ian,

I am looking in my ABS book. The Appendix the tapping codes are in is called 
"Appendix 2 IMO-Diving Bell Emergency Locating Device". The paragraph
just before the codes reads:

	In addition to the communications systems referred to above, a 
	standard bell emergency communication tapping code should be adopted
	as given below for use between persons in the bell and rescue divers.
	A copy of this code should be displayed inside and outside the
	bell and also in the dive control room.
	
The appendix has a lot of specs on transponder frequencies and interrogation
rates. Nothing that explains what a "Tapping Code" sounds like. For
instance what does "3.3.3" sound like? I can think of:

	3 quick taps, short pause, 3 quick taps, short pause, 3 quick taps

Anyone know?

Regards,
Ray	

> Date: Tue, 9 Jul 2002 16:22:47 -0700
> From: Ian Roxborough <irox@ix.netcom.com>
> To: personal_submersibles@psubs.org
> Subject: Re: [PSUBS-MAILIST] Emergency tapping code...
> Content-Transfer-Encoding: 7bit
> 
> 
> Just incase your under the impression I made up the
> code, it's printed in Appendix 2 of the ABS 'rules for
> building and classing underwater vehicles, systems, and
> hyperbaric facilities'.  There doesn't seem to be many
> references to it on the web, but one web site was selling
> something called "Bell Tapping Code plastic cards" which
> may or may not be the same thing.
> 
> Ian.
> 
> 
> On Tue, 9 Jul 2002 15:31:58 -0700
> "Jacob Lauser" <sirius@riverstyx.com> wrote:
> 
> > Ray,
> > 
> > I know Morse Code at 30 words per minute because of my commercial and
> > amateur radio licensing, but tapping it on a ship's hull and tapping it out
> > on the radio are two different things because you don't get the
> > differentiation between a long beep and a short beep. A tap is a tap, you
> > can't make it sound longer or shorter. Just about all you can do is space
> > the time between taps, but it's still very slow tapping without the audio
> > signal characteristics. (I took great exception to the movie U-571, which
> > had a tapping scene) Just my 2 cents, but I do agree; what good does posting
> > your own secret code inside the sub do for someone on the outside coming to
> > the rescue. ;) Happy subbing!
> > 
> > - Jake Lauser
> > 
> > PS. Did anyone catch the awesome show in the History Channel last night on
> > the "Silent Service"?
> > 
> > 
> > 
> > 
> 
> 
> -- 
> The moon ate the sun on Monday and it was an awsome sight to see.