Distress beacon
A distress beacon (also known as a disaster beacon) was an automated device on board starships or shuttles that was used to alert other ships or stations that they were in need of help, and made it easier to locate the starship in distress. It was typically deployed in dire circumstances, such as immediately before a starship is disabled or destroyed.

A portable version was also included in 22nd century away kits. ()

When Klingons began attacking the Vulcan colony at Doctari Alpha, the Burnham's activated a distress beacon in their home. ()

In 2267, the signal from the automated disaster beacon of the  was barely detectable by the  as the Enterprise attempted to find the Constellation. ()

The distress beacon of the Promellian battle cruiser Cleponji continued to transmit for at least a millennium after its crew had perished while their ship been held by aceton assimilators, until it was silenced at long last after being discovered by the  in 2366. ()

When Benjamin Sisko and Dukat were stranded together after the  was destroyed, they used a distress beacon, although Dukat deactivated it. ()

While being held in a tractor beam by a Hirogen ship in 2374, Tuvok sent out a distress beacon from aboard the Class 2 shuttle . ()

After crash landing on a Class D planet in 2375, Tuvok re-calibrated his shuttle's distress beacon. The beacon was later used as the center of a two-meter  where a transporter beam from the  transported Tuvok, Tom Paris and Noss back to the ship. ()

See also 
 Recorder marker
 Subspace marker
 Warning beacon

de: Notrufbake
Communications technology