[PSUBS-MAILIST] depth sonar

[Juergen Guerrero Kommritz via Personal_Submersibles]

 Hello HankIn 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 wishesJuergen
    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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