[PSUBS-MAILIST] cell phone link

Wed May 6 18:58:14 EDT 2015

Sean,
Turns out Android 3 has an app that allows the user to turn it on remotely called remote turn on.
I assume one can voice command the same phone, then I need to make the mic on my acoustic radio operate hands free and I am away. This could work
Hank
--------------------------------------------
On Wed, 5/6/15, Sean T. Stevenson via Personal_Submersibles <personal_submersibles at psubs.org> wrote:

 Subject: Re: [PSUBS-MAILIST] cell phone link
 To: "Personal Submersibles General Discussion" <personal_submersibles at psubs.org>
 Received: Wednesday, May 6, 2015, 11:11 AM

 Floating is a good idea, but if you're towing
 a buoy anyway, that could be used to keep a neutral or
 negatively buoyant umbilical under tension and out of the
 way. In any case, you need to remain concerned about the
 power lost to dragging that umbilical through the water - it
 is not insignificant. I would want to avoid increasing its
 drag if you find you have an appropriate amount of power
 available currently.
 There are two ways to tackle the problem:
 acoustic transmission (ultrasonic modem) or electrical /
 optical data transmission through a dedicated umbilical. The
 former has the advantage of independence, but if you're
 towing a buoy anyway, perhaps you could add transmission to
 your current setup without drastically increasing drag. Your
 budget will have an effect here. If I were to go all out
 I'd look at designing a buoy with integrated GPS, radio
 antennas, cell or what have you, and multiplex all of those
 signals down an armoured optical fiber to the sub. Your
 requirements are probably more modest... Perhaps you could
 simply add a watchdog / deadman conductor to your existing
 cable, such that a break in the circuit prompts some action
 on the buoy?
 Sean

 On May 5, 2015 5:11:42 PM
 MDT, hank pronk via Personal_Submersibles
 <personal_submersibles at psubs.org> wrote:

 Sean,
 I am using a 1/4 inch nylon rope and it is
 quite buoyant.  A coax would not be buoyant or is it?  The
 line should be as buoyant as the rope to help avoid
 entanglement, mind you I have it rigged to be
 jettisoning.
 Hank
 On Tue, 5/5/15, Sean T. Stevenson via
 Personal_Submersibles
 <personal_submersibles at psubs.org> wrote:

  Subject: Re: [PSUBS-MAILIST]
 cell phone link
  To: "Personal
 Submersibles General Discussion"
 <personal_submersibles at psubs.org>

 Received: Tuesday, May 5, 2015, 7:06 PM

  Hank, if that's the case you could run
 a
  dedicated data cable to your buoy, or
 even run a cell
  booster with coax up to the
 buoy.  What diameter is the
  line
 you're currently using?  Another option is optical
  fiber, but then you have additional hardware
 cost on both
  ends.
  Sean

  On May 5,
 2015 4:57:02 PM
  MDT, hank pronk via
 Personal_Submers!
  ibles

 <personal_submersibles at psubs.org> wrote:

  Hi

 Lasse,
  Thank you for the link. 
  Unfortunately they recommend a cable no longer
 than 50m. 
  Most of my dive time will be
 between 400 and 500 feet.  The
  cable would
 work fine because I tow a float the same way
  with buoyant nylon rope.  I could bypass the
 acoustic radio
  altogether.  
  Hank
  On Tue, 5/5/15, Lasse
 Schmidt via
  Personal_Submersibles
  <personal_submersibles at psubs.org>
 wrote:

   Subject: Re:
 [PSUBS-MAILIST]
  cell phone link
   To: "Personal

 Submersibles General Discussion"

 <personal_submersibles at psubs.org>

  Received: Tuesday, May 5, 2015, 6:44 PM

   I don't know if
 this
   is
  of any help, but
 this unit allows for GSM calls
   underwater.
 I use their hydrophone in my sub
  and it
 works
   great.

   http://www.oceanreefgroup.com/products/comms/products_alphauwcp.html

   Cheers L!

  asse

   Lasse Schmidt
   Upplevelseakuten AB

  Skeppsbron
   21, Tullhus 1

  11130 Stockholm
   Telefon växel: 08-660 16

 10
   Mobiltelefon: 070-28 32 660

   5
  maj
 2015 kl. 23:38 skrev hank pronk via

 Personal_Submersibles

 <personal_submersibles at psubs.org>:

   Hi all,
   I am curious if
 anyone knows a way that I
   can activate a
 cell phone from my
  submarine through my
   acoustic radio.  I
  would
 have my acoustic radio mounted on
   my
  float (safety buoy)  Since I dive alone I
 always tow a
   safety buoy with a diver
 flag.  It would add
  a level of
   safety if I could call for help
  through my cell or a

 satellite radio.
   Hank�
  �

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