The Morska system was a location in Klingon space. In 2293 it contained an orbital listening post that monitored vessels in the Neutral Zone vicinity. To acquire safe passage, USS Enterprise-A masqueraded as, "thy mighty Klingon fighter Ursva," en route to Rura Penthe, on a bio-quarrantine of materials and goods. (TOS movie: Star Trek VI: The Undiscovered Country)

In 2346 it was the location of the Romulan ruse that led the Klingon fleet away from Khitomer. (TLE novel: The Art of the Impossible)