Navagatable waters are under federal jurisdiction. Unless Congress has authorized the states to act, they can't intefere with those waters.
"Federal and state governments have concurrent
jurisdiction over navigable waters and the lands
beneath. Federal law also recognizes state and
local authority to regulate
anchorages. The
regulatory
power of the state is subject to the
paramount authority of the Federal
government
for the regulation of interstate and foreign
commerce. States exercise control if it is
consistent with Federal actions or functions, and
does not interrupt commerce.
"The United States Coast Guard (USCG) has the authority to
establish, administer, and enforce anchorage grounds and
regulations for vessels in navigable waters of the United
States (U.S.). Establishing, amending or removing an
anchorage area often originates at the local level, with key
waterway users expressing a need for such an area. The
USCG, or other government agencies, might also determine
a need for an anchorage area."
FEDERAL ANCHORAGE
REGULATIONS 33 CFR 110.72d and 33 CFR 110.173