UNSC Razor's Edge
From Halopedia, the Halo wiki
The UNSC Razor's Edge was a prowler of the United Nations Space Command. It was part of the Battle of New Harmony in 2537. During the battle, they managed to attach a telemetry probe to a retreating Covenant frigate. They then followed the frigate through slipspace and discovered K7-49.
Its eventual fate is unknown.
