It is the court that determines if a case falls within admiralty jurisdiction and the usual criterion is the presence of WATER.
The DeLovio decision -- De Lovio v. Boit (D. Mass. 1815) 7 Fed.Cases nr. 3776, page 418 - was a case involving marine insurance, insurance on a sailing ship and its cargo. No subsequent court applied maritime law to such dry land situations as automobile insurance. Taking a badly written sentence from 1815 and trying to use it 200 years later, while ignoring all the legal history in-between, fools nobody worth fooling.
You will discover, if you bother to look, plenty of efforts, in traffic court, in criminal court, in tax court, for litigants (usually playing their own lawyer) trying to flimflam the judge into treating their case as an admiralty action, but it never works.
"Rebellion is as the sin of witchcraft."
First Samuel 15:23