Command neural interface

Summary
Neural lace implants are implanted in the brains of every UNSC officer upon conscription. Once installed, they cannot be removed without killing the host, and are permanent. Their main use is the storage of data codes, NAV data, and also for receiving telemetry from outside sources. AIs can access the lace with the owner's consent, and retrieve data for use.

In the level Keyes, the Master Chief recovers the CNI transpoder out of the body of Captain Keyes, who is deceased and infested by the Flood.