[PSUBS-MAILIST] O2 tanks

[hank pronk via Personal_Submersibles]

Hi all,How do deep diving subs deal with external O2 supply.  Does Alvin have external tanks for O2,  are they super special tanks?Hank
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://www.whoweb.com/pipermail/personal_submersibles/attachments/20170701/65655990/attachment.html>