To undertake tasks that include: planning and conduct of operations to provide security of the Australian coastline from unauthorised maritime arrivals, smuggling, quarantine evasion and other intrusions to Australian sovereignty; counter-terrorism responses; search and rescue; humanitarian assistance and disaster relief. Defence contributes to the Department of Home Affairs civil surveillance program and Maritime Border Command tasking, providing maritime surveillance assets that are tasked routinely in accordance with the Government's direction. Defence, through the Defence Assistance to the Civil Community (DACC) program, supports the Commonwealth and State/Territory Governments with emergency and non-emergency tasks, as well as supporting events of national significance as requested by relevant authorities and the general public.