Which system is capable of tracking 24 hostile air targets and launching missiles against 6 different targets?

The Phoenix missile system is designed specifically for engaging multiple aerial targets simultaneously. Its capability to track up to 24 hostile air targets and launch missiles against 6 of them makes it particularly effective for air defense operations. This system was primarily utilized by the US Navy and designed to provide an effective deterrent and response to enemy aircraft and missiles.

In contrast, the Tomahawk is primarily a long-range cruise missile designed for precision strikes against surface targets rather than active air defense. The Phalanx is an automated close-in weapon system that provides point defense against close-range threats, but it doesn't have the capability to track multiple targets over a greater distance or to engage six different targets simultaneously. The Harpoon is a missile system aimed at anti-ship warfare, focusing on striking surface targets rather than managing multiple aerial threats. In summary, the Phoenix stands out for its specific air-to-air capabilities and effective target engagement features, which aligns with the requirements outlined in the question.