A Starfleet admiral who commands the fleet assembled against the Borg cube in 2373 in Star Trek: First Contact, and who later sends messages to the USS Voyager in the Delta Quadrant.
Admiral Hayes is played by Jack Shearer in Star Trek: First Contact and in two Voyager episodes. At the start of the film he tells Picard by subspace that the Borg have entered Federation space and orders the Enterprise-E to patrol the Neutral Zone, well away from the fighting.
Picard, listening to the fleet's transmissions, learns that the admiral's flagship has been destroyed, and takes command of the surviving ships to finish the cube above Earth. Hayes himself evidently survived.
In Hope and Fear the crew decodes a garbled message from him, which the alien Arturis falsifies to lure them aboard the fake USS Dauntless; the real text offers little help. In Life Line he sends word through the Pathfinder Project, asking Janeway for news of casualties and her Maquis crew.