Average Customer Review: based on 2 reviews.Rating: Awesome
Could this communications unit be used by a dredge tender, in the water up to shoulders tending the dredge but tenders head not submerged, to communicate with an identical communications unit used by a diver who is working underwater?
Hello Dave, if you are trying to talk to the diver underwater you need this unit. Ocean Reef M100 Portable Surface Transceiver Unit web link: http://www.scuba.com/scuba-gear-168/029058/Ocean-Reef-M100-Portable-Surface-Transceiver-Unit.html. To talk to the diver underwater you need to have a transducer in the water to talk to him.
I have two of these units but was never able to get them to work to where they were useful in recovery dives is there some place I can send them to be checked out thanks
Hello Robert, you can send them directly to the manufacture for warranty and non-warranty work. Here is the link: http://www.scuba.com/resources/repair/oceanreef.aspx. to all there contact information.
product code: 33122GSM DC
The GSM DC™ underwater transceiver unit incorporates the latest innovations in underwater ultrasonic 2-way radio communication. The unit features a digital driver for verbal message equalization, an automatic system for activating transmission (DAT™), and a double transceiver channel. The standard frequency (channel 1) is the same for all Neptune System units, so it is possible to communicate with any other GSM G.divers, GSM DC™, GSM G-Power, GSM G-Power SL, GSM CUBE3, M101A G.divers receive units and M105 Digital / M100 G.divers surface units. The GSM DC™ is a dual channel (DC) unit, which means it is equipped with two transceiver channels. By pressing buttons 'A' and 'B', it is possible to change the frequency channel. Any time the channel is changed, a recorded message informs the diver of which channel has been activated (channel 1 or channel 2). The two channels allow different diving groups to operate in the same area with limited interference and confusion. The GSM DC™ sound quality depends upon the D-Mic microphone, a special dynamic microphone with high acoustic qualities, and the microprocessor (DSP), which takes the digitized vocal message and filters out unwanted noise such as exhaust, air bubbles, and/or mask vibrations.
Wireless ultrasonic unit
DIGITAL driver for vocal message equalization
Automatic system for activating transmission (DAT)
Double transceiver channel
Automatically activated once submerged in water, receiving also automatic
System type H-SSB
Code - 33122
Type - Wireless ultrasonic
Activation - Automatic
Transmission - PTT
Receiving - Automatic
Speaker volume adjustmant - Yes
System type - H-SSB
Frequency - 32.768 kHz ch. 2 41.000 kHz
Working Range - 200m/600ft
Rated Depth - 40m/120ft
Powered by - 9v alkaline
Autonomy (total) - 9h
Low Battery Autonomy - 1h
Low Battery Alarm - 1 beep/30 sec under 7.5 v
DAT - Yes
Transmit receive cycle - Yes DAT mode-30 sec transmit 20 sec receive
Squelch - Automatic
Weight with batteries - 370g/12.9