A Starfleet Communications research effort, driven by Reginald Barclay, that succeeded in establishing contact with the USS Voyager in the Delta Quadrant and later arranged regular data exchanges with the ship.
The Pathfinder Project is a Starfleet Communications programme based in San Francisco, set up to find a way of reaching the USS Voyager after the ship was confirmed to be alive in the Delta Quadrant. It is led by Commander Pete Harkins and overseen by Admiral Owen Paris.
In the Voyager episode Pathfinder, Lieutenant Reginald Barclay becomes obsessed with the task and, against orders, uses the MIDAS array to create a micro-wormhole through which a brief two-way conversation with Voyager is achieved.
The project then develops a monthly data stream, seen in Life Line and Inside Man, and eventually live conversations with the crew's families in Author, Author. Its staff are watching when Voyager finally returns to Earth in Endgame.