USS Dewey fired 20 HVPs during RIMPAC 2018

The Pentagon quietly conducted a test of the hyper velocity projectile (HVP) aboard USS Dewey during Rim of the Pacific (RIMPAC) 2018.

U.S. Naval Forces Central Command/U.S. Fifth Fleet [Public domain], via Wikimedia Commons

Twenty rounds were fired from the Mark 45 deck gun of the destroyer. The low-drag, guided projectile can be used to intercept incoming anti-ship missiles.

Source