Among the tools used in the search were three self-locating datum marker buoys (SLDMBs) dropped into the Gulf of Mexico from Coast Guard helicopters.

Bulk Carrier Rescues Crew of Fire-stricken Fishing Vessel. MarineLink. November 11, 2021. A ... and in response the aircrew deployed a flare along with a self locating datum marker buoy (SLDMB).

Alarm was raised as MSC Cruises vessel sailed off the coast of ... the Coast Guard aircrew commenced searching and deployed a self-locating datum marker buoy that measures sea currents to assist ...