USS Astrad (NCC-1739) was a Constitution-class heavy cruiser — of the Achernar-subclass — on active duty in Starfleet during at least the 23rd century. (Ships of the Star Fleet, vol. 1) Astrad was commissioned 2270. In mid-2276, Robert Gossenberger was scheduled to be Astrad's chief engineer. (Star Trek: Avenger: "Star Survey") During the Kelvan War in 2285, it was part of Task Force Four and one of the first vessels rescued by Task Force Six. (Orion Press: In Harm's Way)