By end of 2008, "Su Ao" was spotted to have eight HF-3 AShMs installed in place of eight Harpoon AShMs. It has been speculated from 2014 on that a navalized Sky Bow missile system, currently planned for an upcoming shipbuilding programme that involves the procurement of up to 15 general purpose frigates and three or four air defense destroyers, will also be replacing the Standard Missile system on these vessels. No plan for any Mk 26-compatible version of the Sky Bow III missile is ever known to have existed.