[PSUBS-MAILIST] OTS/Ocean Reef

Sat Jul 14 18:42:30 EDT 2018

Emile,
that M100 looks tempting as it is such a small package & has the 
same range as the M105.
Is there a difference in quality between the M100 & M105.? 
Do you know how many watts they both are?
Is there a power jack for the M100? 
So you would just buy 2 M100 surface modules & they would communicate
ok with each other?
Below is additional info on the M105 I found in case anyone is interested.
Thanks, Alan
About This Product
M100 G-DIVERS transceiver portable surface unit

1. Technical characteristics

Main parts of the unit are:

Battery housing: inside the battery housing there is a label with the serial
number and the polarity to insert the battery. Battery should be a 9volt
alkaline one, rechargeable batteries will last shorter. The autonomy with
the alkaline battery (receiving mode) is around 30 hours with 30 minutes of
low battery alarm (one “beep” every 30 seconds)starting when voltage
goes below 6.8volt.

Antenna: It consist of a 10 meter cable directly connected to the main
unit, at the bottom end there is the ceramic antenna, made to transmit
and receive ultrasound to a frequency of 32.768 kHz.
PTT button: it is a magnetic one, positioned right below the headset
connector on the main unit

Headset and microphone assembly with adjustable volume.
Metal clip to attach the unit to the belt of the operator.

8 Pin plug to connect the headset with microphone.G.divers Communications unit manual rel.1.3 September 2010 17

2. Attaching the surface unit to the belt
The M100 G.divers is designed to comfortable and easy to use. The main unit can be
clipped to a belt or jacket, giving the operator an increased range of motion from other
surface units.

3. Checking before use
Once the battery has been installed and you have checked that the cap and cover have
been closed properly, insert the headset with microphone in the plug on the main unit,
the M100 G.divers will turn on automatically. You will hear a “beep” indicating
activation.

Run a finger along the black cylinder at the bottom side of the antenna. You will hear a
“zzzzzz” type sound coming from the speaker.
Try to bring the antenna transducer near the antenna on a M101A G.divers unit, or the
antenna on a GSM G-Divers unit (about 5 cm / 2 inches). You should also be able to hear
the communication when the unit is not immersed in water.
If you hear a repeated “beep” (about every 30 seconds) this means that the battery is
running low. Change it.

4. Basic Instructions for communicate with divers underwater

The following is the recommended operating procedure:
Ensure the battery is properly installed with the correct polarity.
Close the battery compartment. You can use some grease to make this
operation easier.
Attach the main unit to a secure place on your person such as a belt.
Lower the transducer into the water. If you are on a boat, lower the
transducer until it clears the hull. Under non circumstances should the
transducer lie on the sea floor, this will reduce the signal strength and
range.
Connect the headset to the main unit, the unit turns on automatically upon
connection.
The unit is now in the receiving mode. To send a message push and hold
the PTT button located on the main unit. After a short “beep” you may
begin speaking. When you release the button, the unit will return to
receive mode.
To improve the communication quality set the antenna the near as possible
to diver’s depth.
It is important that the transducer does not lay on the bottom
When speaking to divers, keep in mind that they have a lot of things going
on while underwater. It is better to have divers attention before starting
the communication.
Talk slowly and clearly
Do not make long sentences.
A good exercise is to make them repeat what they understood.

CAUTION:
Do not get the headset wet
Do not put the unit underwater, it will not function as an underwater unit
Do not attempt to keep the PTT button permanently depressed! You will not be
able to receive messages from the divers and you may damage the unit.

Sent from my iPad

> On 14/07/2018, at 10:23 AM, via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
> 
> Alan,
>  
> All the Ocean reef units are rated for 250  meter range (833) ft. As said, it was much more at open sea.
>  
> Emile
>  
> Van: Personal_Submersibles <personal_submersibles-bounces at psubs.org> Namens Alan via Personal_Submersibles
> Verzonden: zaterdag 14 juli 2018 00:07
> Aan: Personal Submersibles General Discussion <personal_submersibles at psubs.org>
> Onderwerp: Re: [PSUBS-MAILIST] OTS/Ocean Reef
>  
> Thanks Emile,
> I was looking at the alternatives recently but are holding off as it's not
> urgent for me to buy yet. What would you recommend for a sub with
> a 500ft operating depth? G.L. requires a range of 2x the operating depth
> but as the range is effected by water condition I am not sure what they
> actually require. Ie. 1000ft on a good day!
> Cheers Alan
>  
>  
> Sent from my iPad
> 
> On 14/07/2018, at 9:07 AM, via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
> 
> All,
>  
> Ocean Reef UW communication  might be  a alternative for those who want a cheaper alternative for OTS. I am using 2 M105 DC units for 5 years now and happy with it. They are more intended for recreational use that OTS but  the units give good quality sound even with the sub at 200 M (600 ft) deep and a Kilometer away on open sea!
>  
> The M105 is meant as a surface unit but can be used inside a sub. http://diving.oceanreefgroup.com/accessory/m105-digital-dc/
> The M100  is a more compact unit  http://diving.oceanreefgroup.com/accessory/m100-g-divers-portable-surface-transceiver/
>  
> I am a reseller for Europe. Can give at least 10% discount to Psubs members.  Contact at www.nordicsub.com
> For USA:  Operator at oceanreefgroup.com
>  
> Best Regards, Emile van Essen
> The Netherlands
>  
>  
>  
>  
> Van: Personal_Submersibles <personal_submersibles-bounces at psubs.org> Namens James Frankland via Personal_Submersibles
> Verzonden: vrijdag 13 juli 2018 20:46
> Aan: Personal Submersibles General Discussion <personal_submersibles at psubs.org>
> Onderwerp: Re: [PSUBS-MAILIST] OTS
>  
> Sorry hank. He sold them all.
>  
> On Thu, 12 Jul 2018 14:55 hank pronk via Personal_Submersibles, <personal_submersibles at psubs.org> wrote:
> James,
> Sure that would be great.
> Hank
>  
> On Thursday, July 12, 2018, 7:45:18 AM MDT, James Frankland via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
>  
>  
> Hank,
> 
> The local tech diving shop here were selling some a while ago.
> Probably gone but I could ask if you like?
> James
> 
> On 11 July 2018 at 22:08, hank pronk via Personal_Submersibles
> <personal_submersibles at psubs.org> wrote:
> > Hi All,
> > Is anyone selling a OTS communications system?
> > Hank
> >
> > _______________________________________________
> > Personal_Submersibles mailing list
> > Personal_Submersibles at psubs.org
> > http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles
> 
> >
> _______________________________________________
> Personal_Submersibles mailing list
> Personal_Submersibles at psubs.org
> http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles
> _______________________________________________
> Personal_Submersibles mailing list
> Personal_Submersibles at psubs.org
> http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles
> _______________________________________________
> Personal_Submersibles mailing list
> Personal_Submersibles at psubs.org
> http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles
> _______________________________________________
> Personal_Submersibles mailing list
> Personal_Submersibles at psubs.org
> http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://www.whoweb.com/pipermail/personal_submersibles/attachments/20180715/03189ebf/attachment-0001.html>