The Nenebek was a worn-out mining shuttle from Pentarus V, piloted by Captain Dirgo, which crashed on a desert moon in 2367 with Picard and Wesley Crusher aboard.
The Nenebek appears in the Next Generation episode Final Mission. Picard is asked to settle a dispute among the miners of Pentarus V, and takes Wesley, who has just been accepted to Starfleet Academy, along for a last assignment. Their transport is the Nenebek, sent by the miners, whose proud owner Dirgo brushes aside Picard's doubts about its condition.
The shuttle breaks down on the way and Dirgo makes a forced landing on Lambda Paz, a hot, barren moon of Pentarus III. The three walk to a cave where a fountain of water is guarded by an energy field.
Dirgo's impatience gets him killed and leaves Picard badly hurt, and Wesley has to keep the captain alive and work out how to disable the guardian before the Enterprise arrives.