[PSUBS-MAILIST] OTS/Ocean Reef

Sun Jul 15 05:10:28 EDT 2018

Emile,
more questions. I have seen an Ocean Reef unit Gsm G Power.
They advertise a range from 500-1000ft. Is this able to be adapted for submarine
use. I believe the transducer is attached to the unit so some hacking would be
needed, to take it off & put it outside the hull. 
Also note there is a water sensing switch that would need to be wired closed. 
https://www.scuba.com/scuba-gear-168/028167/Ocean-Reef-GSM-G-Power-Scuba-Communication-Unit.html
Cheers Alan

Sent from my iPad

> On 15/07/2018, at 10:42 AM, Alan via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
> 
> 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
>> >
>> > _______________________________________________
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>> > Personal_Submersibles at psubs.org
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>> 
>> >
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