 Missiles, such as the SS-N-27 Sizzler, that incorporate this sort of threat modality are regarded by U.S. Navy analysts as potentially being able to penetrate the U.S. Navy's defensive systems.Recent years have seen a growing amount of attention being paid to the possibility of ballistic missiles being re-purposed or designed for an anti-ship role.Speculation has focused on the development of such missiles for use by China's People's Liberation Army Navy.