I have read some of Gordon Wests posts on the subject although not the particular article you mentioned.
Unfortunately the patent number does not appear on the Kiss-SSB web site or I would look it up.
My experience has been installing and commissioning HF radios and Antenna Tuners on aircraft in Australia during the 80’s. If you think about it aircraft have a similar problem to GRP yachts in that the air-frame becomes the counterpoise by default since its not very convenient to ground it at 20,000 feet 😉
I always believe in keeping things as simple as possible and learning from other peoples experiences so I too would be interested to hear from members who have successfully installed an HF SSB transmitter on a Nauticat.