Starbase 347 was a Federation starbase in Starfleet service in the 24th century, located somewhere in the galaxy's Alpha or Beta Quadrant.
History and specifics[]
In the year 2377 of the First Splinter timeline, Doctor Sarjenka traveled from Drema IV to Starbase 347, from where she then joined the crew of starship da Vinci. It was also at Starbase 347 that Captain David Gold learned of the death of his old friend Rha-Teramaet. (CoE eBook: Turn the Page)