Telemetry probe

A telemetry probe is a device used utilised by the UNSC.

Overview
The only known usage of these devices was to attach it to a Covenant ship and track it through slipspace. In 2537, at the Battle of New Harmony, the prowler managed to attach one to a Covenant warship at the battle, and track it to K7-49, a Covenant shipyard facility seventeen light years from the UNSC outer colonies.