Since they have not tried ,it I did and can garante to every one that the 900mghrz TX unit works in fresh water,I never said it worked in salt and I don't run in salt,but with a different antena it might work.
The reseption I get in the pond I have currently tested in ,which has probbably some metals ect .in it since its reclaimed water.
Real time readings are displayed on the Dashboard from lake level down to about a meter,measurements are soo sensative even the free board level is measured,WOW
,mind you useing the supplied un modified antena.
No modifications to the unit was done ,just normal setup as if in a plane or helli for the shaft RPM.
Store your models peramiters and even temp,depth,voltage alarms as you like and what you want to see on the dashboard ie. DEPTH or not at all with the supplied USB cable.
There is available an up grade Yagi antena and TX antena that gives even better performance,or the super 900 mghrz 1 watt system, I believe theTX transmits several miles! But cost more.I just tried the normal system and am very very happy with it.
On the serface even with the antena submerged a few inches the range of TX is far greater out to 400+ meters!
Even that is good as while running on the serface out at distance the full range of readdings are available.
Set the alarm for aproaching Lipo low voltage and you will know when to bring the sub back into port.
Periscope depth is no problem if your at that depth all the readings are shown in real time out to about 50 to 60 meters.
Its a wonderfull profetional grade system that can go on anny viecle be it a RC sub or a Jet Liner!
It replaces a host of bench tools i.e voltmeter,ampmeter tempsensing tools ,digital RPM meter ect. that alone pays for its self,with all the super easy plug and play sensors every single operational aspect of your sub can be minitored ,loged,saved on your laptop and viewed later for further improvement and saved for forseeing overheating components and maulfunctions.
Even lost radio signal logs!
All integrated into a standard servo size black box and thin longer TX unit.
It will in no way affect your subs performance or radio reception as long as you follow the easy installation instructions that mostly says , to position the TX antena as far away from the models RX as possible,no biggie I tried it close to my RX and saw no diffrence or glitches,JR and Futaba RX TX.
The unit will shut down if the supplied voltage drops bellow a set range and if it goes to high.
Confirming beeps tells you when its recieving and and if the signal is lost,thats how I gauged the reception distances.
Try the system out for your self,if it does not blow your ballast sort of speak then send it back,great company to deal with and very profetional products.
I am sure that Eagle Tree will update there site to mention the RC Sub aplication and will make a depth gage on the PC display program as soon as more systems are sold to RC Sub drivers.
I am going to order the voltage sensor,no inline splicing nice! Also the On Screen vedeo unit and on board mini display for the SB-2 Sub.
Later I will try the GPS option that should be realy interesting to see just how well it recieves underwater,but even if just a few inches say at mast level it should be usefull,but even as a serface readings go it would aid in locating a lost sub.
I did not try the 433 mrhrz unit I think the 900 transmits longer distances and more powerfull cleaner signal.
Thank you junglelord for your well recieved coments
I am in no way affiliated with Eagle Tree Systems nor am I tring to sell there products ,just demonstrating that there systems work very well on my Ladies.
Dave Amur Sub Yard