The U.S. Supreme Court is scheduled to consider on September 28 whether to hear a Maine lobsterman’s challenge to the state’s continuous GPS-tracking requirement for federally permitted lobster boats, a case that could determine whether the justices revisit how the Fourth Amendment applies to tightly regulated industries. The pending petition in Thompson v. Wilson is not yet a ruling on the merits; the court could grant review, deny it or take no immediate action after the conference, according to Associated Press reporting on the court’s schedule.
The case centers on a Maine Department of Marine Resources rule that requires lobstermen holding federal permits to install electronic devices that transmit vessel locations whenever their boats are in the water. The First U.S. Circuit Court of Appeals’ November 2025 opinion says the trackers operate when boats are fishing, docked or used for personal purposes. Maine adopted the rule after the Atlantic States Marine Fisheries Commission directed member states to implement electronic tracking for the federal lobster fleet.
Frank Thompson and several other lobstermen sued state Marine Resources Commissioner Carl Wilson, arguing that the mandate violates the Fourth Amendment’s protections against unreasonable searches and seizures. The federal district court dismissed the case, and the First Circuit affirmed. The appeals court treated commercial lobstering as a closely regulated industry and concluded that the rule satisfied the administrative-search test: it served a substantial government interest, warrantless monitoring was necessary to the regulatory program and the rule supplied an adequate substitute for a warrant.
Thompson’s Supreme Court filing asks the justices to examine a separate question: whether compelling a boat owner to install and continuously power a government tracker is itself a seizure of property. The petition says the device sends a location report every minute and cannot be switched off at the end of a workday. Those are the petitioner’s legal and factual assertions; Maine prevailed below, and the state’s position is that the monitoring is a valid administrative search tied to fishery management and enforcement.
The dispute matters beyond Thompson’s boat because the lower-court reasoning could guide monitoring rules in other regulated trades. An amicus brief filed by the Cato Institute and allied groups urges the Supreme Court to treat the required hardware and continuous transmission as a distinct property seizure, while conservation advocates say reliable vessel data is necessary to understand fishing effort and manage a lobster stock that has declined from peaks a decade ago.
For Maine’s lobster industry, the immediate practical rule is unchanged: federally permitted vessels remain subject to the tracking requirement unless a court orders otherwise. A grant of review would place the constitutional question on the Supreme Court’s merits docket for briefing and argument; a denial would leave the First Circuit decision in force without signaling the justices’ agreement with its reasoning.
