 Also for ASW purposes, two triple Mk 32 torpedo tubes for the Mk 46 ASW torpedo were installed.These cruisers were initially converted into all-missile warships with no naval guns, but later on, two open-mount Mk 24 38 calibre guns were added to the port side and the starboard side, near their aft exhaust stacks.In the late 1960s "Chicago" and "Albany" underwent major engineering overhauls and both the missile systems (Talos and Tartar) had new digital fire control system upgrades to handle the increasing threat from Soviet Navy anti-ship cruise missiles and aircraft.