The U.S. Navy, without fanfare or notice, tested a new weapon last summer that could revolutionize surface warfare. The hyper velocity projectile (HVP) is a Mach 3 shell fired from existing guns on cruisers and destroyers. A guided projectile, HVP can drop high explosives on enemies on the ground up to three times as far as conventional ship gun ammo with a high rate of precision. It can also intercept incoming anti-ship missiles, providing an economical alternative to increasingly expensive anti-missile interceptors.

According to USNI News, the guided missile destroyer USS Dewey fired 20 new HVP projectiles during the 2018 Rim of the Pacific (RIMPAC) exercises. Although the test was unclassified it was not reported at the time by the U.S. Navy. It was the first known use of HVPs at sea by a warship.
https://www.popularmechanics.com/mil...shells-rimpac/