I doubt it has any legal meaning anywhere.
There are specific and well defined rights in regards to waterfront and water access properties and who owns those rights and what those rights entail.
As Ron suggest, you must go to the writer of those words or compet them to use the appropriate terminaolgy pertaining to the rights to which they refer.
Especially in the hands of a writer, or a Poet, or a Lawyer!
The WORDS can make all the difference in the world.
If we knew what words they were using, it could mean all the difference in the world.
Know what I mean?