Gravitic mine

A gravitic mine was a type of mine which was used in the 23rd century and beyond. These mines consisted of explosive charges which were left at a fixed point in space and programmed to detonate when a starship approached it. 

In the Kobayashi Maru scenario, the distress call sent out from the stricken Kobayashi Maru stated that it has been struck by a gravitic mine and disabled. 

Gravitic mines were extensively used during the Federation-Cardassian War in the 2350s and 2360s. Following the war's conclusion, several of the mines were left in place and weren't disarmed. In 2368, the USS Denver (NCC-54927) fell victim to one of these mines while traversing the Beloti sector. 

In 2370, the Albino used an anti-personnel gravitic mine at the main threshold of his compound on Secarus IV.