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RE: [PSUBS-MAILIST] RFC - Radio communications for submersible dive operations
Hi,
Just so everyone knows. The safety committee is
looking into possibilities for underwater
communications since radios have limitations
underwater. We have yet to come to any conclusions for
a reasonable cost recommendation.
Currently we are looking at scratch built, kit built,
or off the shelf alternatives for sub-to-sub and
surface-to-sub communications. If you have any ideas
or recommendations we can look at by all means speak
up.
Our tenative schedule is to have something decided for
use for the 2009 PSUBS Convention. Which means soon
enough that owners can retrofit their subs in time.
Other projects the safety committe is working on are a
standardized buoy and more fomalized dive operations
plan. Both are going to be critical when operating in
USCG waters at the 2008 PSUBS Convention.
Just thought you would like a glimpse of some of the
behind the scenes work. Details will be shared when
appropiate.
Regards,
Ray
--- Emile van Essen <emile@airesearch.nl> wrote:
> James,
>
> Sorry for the language. One click further was
> English .
> But the price was noted there. 1100,- Euro for one
> unit. Maybe somewhere
> else for 2 units a better price.
>
> Team Nemo and the C-quester from U-boatworx uses
> this sets; Sound quality is
> perfect but I don't know how the transducer is built
> in.
>
> Both OTS and ocean reef can work on 32.768 KHz. So
> you can chat with other
> psubbers ;-)
>
> Regards, Emile
>
> -----Oorspronkelijk bericht-----
> Van: owner-personal_submersibles@psubs.org
> [mailto:owner-personal_submersibles@psubs.org]
> Namens James Frankland
> Verzonden: woensdag 24 oktober 2007 15:01
> Aan: personal_submersibles@psubs.org
> Onderwerp: RE: [PSUBS-MAILIST] RFC - Radio
> communications for submersible
> dive operations
>
> Hi Emile
>
> That ocean reef system look really good.
>
> My Dutch is a bit rusty, so Ive found the page in
> English here!
>
> Thanks
> James
>
> http://www.oceanreefgroup.com/
>
>
>
> ----- Original Message -----
> From: Emile van Essen [mailto:emile@airesearch.nl]
> To: personal_submersibles@psubs.org
> Sent: Wed, 24 Oct 2007 12:49:56 +0200
> Subject: RE: [PSUBS-MAILIST] RFC - Radio
> communications for submersible dive
> operations
>
> James,
>
> A CB does not work in salt water. The more
> electrical conductive, the worse.
>
> It is good to have a CB or VHF for surface and a
> acoustic for submerged.
>
> The Ocean Reef surface station is a option for sub
> to sub or sub to surface.
>
www.divequipment.nl/producten.asp?categorie_id=15&product_id=325##
>
>
> or some more expensive
> http://www.oceantechnologysystems.com
>
> The trancducer may have a depth limit.
>
> Emile
>
> -----Oorspronkelijk bericht-----
> Van: owner-personal_submersibles@psubs.org
> [mailto:owner-personal_submersibles@psubs.org]
> Namens James Frankland
> Verzonden: woensdag 24 oktober 2007 10:11
> Aan: personal_submersibles@psubs.org
> Onderwerp: Re: [PSUBS-MAILIST] RFC - Radio
> communications for submersible
> dive operations
>
> Hello Carsten and all.
>
> Interesting to hear that CB penetrates the water to
> 24 feet. Would the
> range of the radio be improved if the recieving
> antene was dangled into the
> water? Does it work in salt water?
>
> Does anybody have any sort of submerged sub to ship
> communication that works
> with salt water? I believe its quite hard to
> achieve except at low
> frequencies.
>
> I checked out a company that make data communication
> devices for oil rigs.
> They are very expensive, but apparently they are
> developing a new system for
> divers that is more reasonably priced. ok, its not
> voice, but a txt message
> from 1km away is still pretty good!
>
> Here is a copy of an email i recieved from the
> company.
>
> regards
> James
>
> Hi James,
>
> We have done some work on acoustic through-water
> communication using subsea
> acoustic modems and have supplied several systems to
> date. Each has been
> different as each has been tailored for specific
> applications.
> Typical applications have been to send data from a
> subsea sensor to the
> surface, but we have also worked on a few AUV
> projects where commands have
> been sent to the vehicle from the surface, and data
> has been sent from the
> vehicle to the surface.
> However, to my knowledge we have not yet transmitted
> speech through water.
> It may be something we are looking at, as we are
> developing a new ?micron?
> modem which, amongst other things, will hopefully be
> very useful to the
> diver market.
>
> Our acoustic modem systems currently range in price
> from around UKP 11,000
> to UKP 25,000 depending upon the setup.
> The new micron modem, able to transmit low data
> rates up to 1km, should be
> around UKP 2,000 per subsea head.
>
> I hope this initial information helps.
> Best regards,
> Paul
> Paul Hudson
> Marketing Executive
> Tritech International Limited
> Peregrine Road, Westhill Business Park, Westhill,
> Aberdeen, AB32
> 6JL.
> ++ 44 (0)1224 744111 (tel)
> ++ 44 (0)1224 741771 (fax)
> www.tritech.co.uk
>
> Tritech International Limited is registered in
> Scotland.
> Registered number: 85501. Registered office: 34
> Albyn Place, Aberdeen.
>
>
> ----- Original Message -----
> From: MerlinSub@t-online.de
> [mailto:MerlinSub@t-online.de]
> To: personal_submersibles@psubs.org
> Sent: 23 Oct 2007 18:11 GMT
> Subject: Re: [PSUBS-MAILIST] RFC - Radio
> communications for submersible dive
> operations
>
>
> Nemo and Peppers has CB-Radios for communication,
> with support boats
> but this works also underwater in fresh water on
> short distance as sub to
> sub communications.
> CB works underwater to surface support about 18-24
> feet. Sub to sub about
> 9-18 feet.
>
> Euronaut has both CB and VHF marine radio.
> In Germany you need a radio-operator licence to
> handle a vhf-radio - for a
> CB not.
>
> For a freshwater lake boat the (here) cheaper CB is
> okay,
> - a offshore sub should have better vhf.
>
> External antenna is required on steel hull subs in
> both cases.
>
> regards Carsten
>
>
>
> " Dan. H." <jumachine@comcast.net> schrieb:
> > I don't have a marine radio in my sub. I just use
> a CB type walkie
> talkie,
> > but I should have one and so should every boat. I
> think it's a good idea
> > and I'll get one installed in my sub for next
> season.
>
=== message truncated ===
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