USS Diligence (NCC-1956)

USS Diligence (NCC-1956) was a Knox-class frigate active in the 23rd century.

In April of 2281, a task force that includes Diligence and USS Haversham was ambushed by Orion pirates. The bridge of the Diligence is destroyed, killing Capt. Charles Austin and several division chiefs (Star Trek: Shadowstar Station: "The Honored Dead").