The Harpoon missile is designed for long-range anti-ship warfare and would be employed against hostile units (normally frigate size and above) posing a threat against Royal Navy or coalition units, whether as an individual unit or as part of a larger task group.
All Type 22 and Type 23 frigates are fitted with the Harpoon surface-to-surface missile system. They are:
Type 22 frigates
Type 23 Frigates
HMS Iron Duke
HMS St Albans