Trekipedia

U.S.S. Sempach

The U.S.S. Sempach was a Constellation class Federation starship that was in service in the late 23rd century. Launched in 2275 under the command of Commodore Jono Danilov, the Sempach was the second Constellation class vessel to be launched. In 2276, the Sempach was one of six Starfleet ships that met with a Romulan flotilla for peace talks under the protection of the Lalairu city-ship Mascrar, though the talks proved to be a ruse. The Sempach survived the engagement unscathed.^[1]