[PSUBS-MAILIST] depth sonar

[Alan via Personal_Submersibles]

Hi Juergen,
I am not sure what's in a transducer. I believe the modern ones
are potted. 
I have made enquiries about forward facing transducers locally in Auckland,
where they do development work & testing on them. The enquiry was
forwarded to the European transducer manufacturer who gave away nothing 
& said test at your own risk.
Cheers Alan

Sent from my iPad

> On 20/07/2018, at 2:06 AM, Juergen Guerrero Kommritz via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
> 
> Hello Hank
> In the book three miles down that describes the exploration of the Japanese submarine I-52 in the central Atlantic the author describes how the crew of the Mir submarine used a fishfinder for the deep dives. The normal sonar was broken so they used a fisfinder, made a hole in the transducer, filled it with oil and used it in their dives down to 4000 m with no problems for more than a month.
> May be this will work for you, than I supose you are not going so deep. 
> Best wishes
> Juergen
> Am Mittwoch, 18. Juli 2018, 17:55:51 GMT-5 hat hank pronk via Personal_Submersibles <personal_submersibles at psubs.org> Folgendes geschrieben:
> 
> 
> Hi all,
> I am looking for ideas on how to make a depth transducer survive to 3,000 feet.   I am thinking about a 1 atm housing with a fibreglass bottom that the transducer can shoot through. 
> Alan, were you working on this idea?
> Hank
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