The USS Castinian (NCC-4325) was a Larson-class Federation starship in service in the 23rd century. She entered active service on reference stardate 1/9006. On stardate 1/9901, the Castinian re-entered service after undergoing a refit to mk II specifications. She was later refit to mk VI specifications and relaunched on stardate 2/1107, and then later to mk VII specifications on stardate 2/1412. (FASA RPG module: Federation Ship Recognition Manual)