A 52-year-old woman died after she was thrown from a boat carrying four adults through a narrow Florida Bay channel near Tavernier Sunday afternoon. Dianelis Martinez was among four people ejected from a 35-foot SeaVee when it turned into Cowpens Cut around 4 p.m., according to the Monroe County Sheriff's Office. Two other passengers were hospitalized with what officials described as minor injuries.
The boat had been traveling northbound in the Intracoastal Waterway off Tavernier before turning into the cut, as reported by the Miami Herald. All four people aboard fell out of the vessel during the incident. The Florida Fish and Wildlife Conservation Commission has not released the identity of the boat's operator, and it has not said whether criminal charges are pending against anyone involved.
In a statement, FWC said it extends its deepest sympathies to the family and friends affected by the incident. The agency has not disclosed the identities of the two other passengers who were hospitalized, and it has not said how Martinez was killed. The Monroe County Medical Examiner's Office is now conducting an autopsy to determine her cause of death.
A Notoriously Tight Squeeze on Florida Bay
Cowpens Cut is a narrow, heavily navigated channel on the Florida Bay side off Tavernier and Plantation Key, flanked by shallow mudflats, seagrass beds, and mangroves, according to Islamorada Keys Guide. Boaters navigating the cut have to stay precisely within channel markers to avoid running aground on the flats or banks that hem in the passage on both sides. That tight geography has made the cut a recurring trouble spot: in November 2025, a boat struck Channel Marker 74A in the same channel, ejecting two passengers who required emergency hospitalization, per Leesfield & Partners.
Sunday's incident remains under investigation, and the sheriff's office has not indicated what caused the boat carrying Martinez to eject its occupants. Vessel ejections and falls overboard are among the most lethal categories of boating accidents on Florida waters, accounting for 32 ejection crashes and 10 fatal fall-overboard drownings statewide in 2025, according to Florida Sportsman. Those crashes frequently happen during sharp, high-speed maneuvers or sudden impacts with fixed obstacles like the ones lining Cowpens Cut.
Monroe County Leads the State in Boating Crashes
Monroe County led all Florida counties in reportable boating accidents last year, recording 71 crashes, according to the same Florida Sportsman analysis of Fish and Wildlife Conservation Commission data. Statewide, Florida recorded 694 reportable boating accidents in 2025, resulting in 51 fatalities and 439 injuries, as reported by CBS News. The state also leads the nation in vessel ownership, with more than 1.03 million registered recreational boats and an estimated 1 million additional non-registered vessels using its waters, the outlet notes.
Florida law requires anyone born on or after January 1, 1988, to complete an FWC-approved boating safety course and carry a safety card before operating a vessel of 10 horsepower or greater, according to WUSF. Despite that requirement, roughly 67% of vessel operators involved in fatal Florida boating accidents in 2025 had received no formal boater education, per maritime legal reporting on FWC data cited by Leesfield & Partners. It is not known whether the operator of the SeaVee involved in Sunday's crash had completed any boater safety training, since FWC has not released the operator's identity.
Should investigators determine that alcohol or drugs played a role, Florida Statute § 327.35 makes operating a vessel with a blood alcohol concentration of 0.08% or higher a crime known as Boating Under the Influence, punishable by fines, probation, mandatory community service, and potential jail time, according to Online Sunshine. FWC has not said whether a BUI evaluation is part of its investigation into Sunday's crash.
Emergency Response in the Keys
Severe trauma cases in the Florida Keys, where a single highway connects the island chain to the mainland, are often handled by Trauma Star, a joint air-ambulance program run by Monroe County Fire Rescue and the Sheriff's Office that flies critically injured patients to Miami trauma centers, according to Monroe County government. It is not clear from available reports whether Trauma Star was used in Sunday's response. The Herald reported that the story would be updated as more information becomes available.
Sunday's fatality follows other recent Monroe County boating tragedies, including a speeding boat that killed a diver near Little Palm Island in May. The Florida Fish and Wildlife Conservation Commission's investigation into Martinez's death continues, with the cause of her death, the identity of the boat's operator, and the question of any charges all still unresolved.
