Re: [PSUBS-MAILIST] RE: Underwater Navigation

[MerlinSub@t-online.de]

Hi Dean, 

The old one was just a plastic canister (20 liters oil drum) 

see: 
http://www.vulcaniasubmarine.com/CARSTEN%20SGT_files/image022.jpg

But it needs a heavy lead weight to counter balance the CB antenna so I 
decide that we need a new float with will be a foam about 500 x 300 x 80 mm. 
Metall deck from Aluminium on top and keel plate flat stainless steel. 
GPS antenna on a kind of raised chair and CB Antenna in front off it. 

Conceptdrawing see here: 

http://www.euronaut.org/content/upload/notes/SP-SSS-GPS-CB-Float-V1.jpg

Peppers get into a pressure dock next month and will be test unmanned to 
200 meter and if survife than manned to 100 meter in the dock. 

So 100 meter cable length is at least required. 

Side Scan Scanner must be on the sub - otherwhise the side scanner 
will not work properly. Sub must be 3 to 10 feet over the bottom.

On this picture you can see a black shadow in the middle of the screen : 

http://www.euronaut.org/content/gfx/old_projects/IMG_5942a.jpg

If the fish or subamrine gets higher this dead area gets more beamy. 
With the scanner on the surface and a deep of more than 40 meter the 
hole screen is black and dead. The idear of side scan is that the 
scanner is deep and look from the side.

regards Carsten 


<Recon1st@aol.com> schrieb:
>  
> In a message dated 1/15/2008 2:34:05 PM Central Standard Time, 
> MerlinSub@t-online.de writes:
> 
> GPS Antenna on the bouy is required for seamap operation. 
> But we anyway travel sometimes with a bouy for the CB radio antenna.
> 
> Has anybody an idear how long we can extent the length the GPS Antenna cable 
> ? 
> 
> At the moment we have just 10 meter (33 feet)
> But would like to have 100 meter (333feet) 
> 
> Regrads Carsten 
> 
> Carsten what did you use for a tether?
>  
> and I would also like to know how to get the 100 meter depth?
>  
> my thoughts were leaning towards leaving the antenna and scanner unit on the 
> surface
> and sending down the image data to screen  in sub 
>  
> I have not given up on this idea yet as the benefits are so great
>  
> Dean
> 
> 
> 
> **************Start the year off right.  Easy ways to stay in shape.     
> http://body.aol.com/fitness/winter-exercise?NCID=aolcmp00300000002489
> 




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