Re: [PSUBS-MAILIST] Waterproof controls

[DJACKSON99@aol.com]

I was planning on routinely flooding the cabin in order to provide additional negative buoyancy and in order to practice emergence escape procedures with my partner.  To that end I figured on mounting the fish finder and a gps in an enclosed acrylic dash board. It would be nice, but not totally necessary to be able to operate a few of the control buttons, especially on the gps.  I suppose a mechanical button could be built into the acrylic panel but I don't have any simple ideas for that, you?  I don't want a CRT just because of the size. 

-- Doug Jackson

In a message dated 4/18/2003 10:12:46 PM Eastern Standard Time, psub_only_temporary@hotmail.com writes:

> I had also wondered how a fishfinder display might withstand the flooding of 
> the pressure hull.  I aim for the simplest design possible, so I worry more 
> about the mechanical strength of the components and less about the 
> reliability of the electrical components.  Along that line of thought I read 
> in the Aquarius habitat's online "user manual" that the LCD screens on 
> laptops were permitted but that monitors using Cathode Ray Tubes were not 
> allowed in the habitat.  I had never thought of CRTs as being dangerous, but 
> I am reminded of the time I threw a brick though one; the weight and range 
> of the chunks of glass that came flying back at me sure gave me a surprise.  
> Whether the risk of imploding the monitor is the reason for the ban on CRTs 
> or there is some other reason, I wonder.
>  I would enjoy reading anyone's thoughts on the subject of 
> pressure/water-proofing interior components both for pressure hull flooding 
> and for use in lock-out chambers(or ambient wet 
> submersibles).  The Aquarius 
> instructional 'primer' can be found here if yer interested.
> 
> http://www.uncwil.edu/nurc/aquarius/aum/ums0.htm
> 
> 
> 
> 
>    regards,
>     Shin