[PSUBS-MAILIST] Pressure change indicator?

[hank pronk via Personal_Submersibles]

Hi Lasse,
I have not heard of a gauge that tells you if you are sinking or surfacing. I use a scuba depth gauge outside my port at the moment.  I can tell if I am stationary when the needle is not moving.  Other members have digital depth gauges that would work better yet because of the degree of accuracy.  
Another solution is a depth sonar (fish finder)  That will tell you the depth of water below you and it will tell you if you are moving up down or not at all.  
You could mount a scuba digital depth gauge outside the passenger window and they could watch the depth change while watching the scenery.
Hank --------------------------------------------
On Fri, 9/19/14, Lasse Schmidt via Personal_Submersibles <personal_submersibles at psubs.org> wrote:

 Subject: [PSUBS-MAILIST] Pressure change indicator?
 To: "Personal Submersibles General Discussion" <personal_submersibles at psubs.org>
 Received: Friday, September 19, 2014, 5:18 AM
 
 Hi,
 
 I´m interested in finding two instruments, I hope I can get
 some pointers from you guys.
 First of all, i´d like to find an instrument that shows if
 the sub is rising or descending, like the ones found in
 airplane (variometer). I have googled  and googled but
 can´t find anything.
 Does anyone have any suggestions how i can see (with an
 instrument) if the sub is stationary or moving up and down?
 
 Secondly, I´m looking for a digital solution to show my
 passengers how deep we are (or what pressure is outside), I
 have been told that there are such instruments but could´t
 find any.
 
 All pointers and suggestions to specific products is
 appreciated.
 Below is a news coverage about our sub, made by swedish
 television.
 http://www.tv4.se/nyhetsmorgon/klipp/maria-forsblom-pr%C3%B6var-livet-under-ytan-2784847
 
 
 Cheers, Lasse
 
 
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