From Halopedia, the Halo wiki
The Iqnucekk-pattern is a civilian domestic transport aircraft used within the Covenant. Like other similar craft such as the Maravelotz-pattern transport and Khaulio-pattern administrator, it primarily served as a swift and nimble transport shuttle for ferrying high-ranking members of Covenant society throughout the Golden City of High Charity and the various frontier-cities of Covenant worlds. The ownership of such craft was cost-prohibitive, and as such their ownership was generally restricted to those who could afford them.
The Iqnucekk is a closed-cabin design with nimble controls and an uncomplicated docking procedure.