Command Neural Interface or CNI implants are implanted in the brain of every UNSC ship commander. In addition to the duties of a standard Neural Interface, they also have several purposes specific to a ship commander. Once installed, they cannot be removed without killing the host or doing permanent damage to the host's brain without sophisticated surgery that is designed for this purpose. 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. The owner of the lace can also receive data about the ship they command, sent directly to their retinas courtesy of the shipboard AI.