The Special Operations Division is commanded by an Assistant Deputy Commissioner (2-1-9) and is divided into several subsections, including Hazardous Materials (Haz-Mat.) and Air-Sea Rescue. The Haz-Mat. subdivision is commanded by a Deputy District Chief (5-1-0). The Air Sea Rescue subdivision is commanded by two Deputy District Chiefs, one in charge of Air Operations (6-8-0), and one in charge of SCUBA Operations (6-8-6). Within the Special Operations Division is the Special Operations Battalion (5-1-5). Similar to a Fire Battalion, the Special Operations Battalion is in charge of all the specialized units and companies within the Chicago Fire Department. The on-duty Special Operations Battalion Chief reports to the Assistant Deputy Commissioner of the Division, as well as the Haz-Mat., SCUBA, and Air Operations Deputy District Chiefs.