Shuttle Bays are areas in Covenant Cruisers and Starships, it acts as a hanger that holds vehicles and Dropships. It also got a Plasma Wall that allows ships and anything else to get through or act as a blocking wall. It was first featured in the Truth and Reconciliation level abroad the Truth and Reconciliation Cruiser in Halo: Combat Evolved.
The Shuttle Bays are separated by a bridge in the middle that usually holds a turret, the spaces on both sides of the bridges are big enough to hold to Spirits. Shuttle Bays are usually three to four stories.