A Klingon listening post that challenges the Enterprise-A as it slips into Klingon space to rescue Kirk and McCoy in Star Trek VI: The Undiscovered Country.
Morska is the site of a Klingon border listening post, seen in Star Trek VI: The Undiscovered Country (2293).
After Kirk and McCoy are sentenced to the mines of Rura Penthe, Spock takes the Enterprise-A across the border to retrieve them. The bored sentry at Morska hails the intruder and demands identification. Because the universal translator would be recognised, Uhura and her colleagues answer in halting Klingon read from a pile of old dictionaries.
They pass the ship off as a freighter, the Ursva, six weeks out of Kronos and carrying supplies to Rura Penthe. The operator is amused rather than suspicious and lets them through.