Much of Jordan's work was done because of the Fastnet disaster. That was what prompted Jordan to design the series drogue in the first place. He also worked very closely with the USCG in the development and testing of the JSD. While the USCG doesn't approve the JSD, it certainly seems, from the document on Jordan's site, to advocate the use of them.
If you read the USCG report, the report's abstract says:
Model and full-scale tests were conducted to investigate the use of drogues to prevent breaking wave capsizing of sailing yachts. A mathematical model was developed which simulates the motion of a boat and drogue in regular waves and in a breaking wave strike. A series drogue is recommended for optimum performance based on the results of this study. Design information for both series and conventional drogues is presented.
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You know what the first rule of sailing is? ...Love. You can learn all the math in the 'verse, but you take
a boat to the sea you don't love, she'll shake you off just as sure as the turning of the worlds. Love keeps
her going when she oughta fall down, tells you she's hurting 'fore she keens. Makes her a home.
—Cpt. Mal Reynolds, Serenity (edited)
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Still—DON'T READ THAT POST AGAIN.