Damn right you will not find the definition written down anywhere, it
is a made up term used by no professionals. I suspect it flys around
yacht clubs like the title Capt.

But feel free to use anytime you want, it means nothing as anyone can
be called a master mariner if they get the itch to do so.

I think in the narrow community that has needs to understand the
accomplishments and required skills of a true master would use the term
Unlimited Master or Master of ******.

Capt.MMA is full of **** when he say it's an INDUSTRY term, it is not.
If it is PROVE it.

Joe