Operationally, the Alpha Line was drawn in the west, not to be crossed by Israeli Forces, and the Bravo Line in the east, not to be crossed by Syrian Forces. Between these lines lies the Area of Separation (AOS) which is a buffer zone. Extending 25 km to either side is the Area of Limitation (AOL) where UNDOF, and Observer Group Golan (OGG) observers under its command, supervise the number of Syrian and Israeli troops and weapons. Inside the AOS, UNDOF operates with checkpoints and patrols. In the AOS, the two line-battalions are operating, in the northern part AUSBATT from the Mount Hermon massif to the region of Quneitra, and in the south POLBATT down to the Jordanian border.