A small explosive that homes in on the pheromones of one chosen individual, used in an attempt to kill Quark shortly after he is named Grand Nagus.
The locator bomb is a compact assassination weapon favoured by Ferengi. Once programmed with a target's pheromone signature it seeks out that person alone before exploding. It appears in the Deep Space Nine episode The Nagus.
When Grand Nagus Zek names Quark as his successor and then apparently dies, Quark suddenly has enemies among the Ferengi gathered on the station. A locator bomb goes off close to him and he escapes with minor injuries; Odo identifies the device and begins looking for whoever set it.
The plotters turn out to be Zek's son Krax and Quark's own brother Rom, who next try to push Quark out of an airlock. Zek, who faked his death to test Krax, reappears in time to stop them.