What is Maritime?

Legal Definition
Pertaining to the sea or ocean or the navigation thereof; or to commerce conducted by navigation of the sea or (in America) of the great lakes and rivers. It is nearly equivalent to "marine" in many connections and uses; in others, the two words are used as quite distinct.
See also
-- Black's Law Dictionary
Legal Definition
That which belongs to or is connected with the sea.
-- Bouviers Law Dictionary
Legal Definition
Pertaining to the sea.
-- Ballentine's Law Dictionary