Hypersonic Air Launched Offensive Anti-Surface
The Hypersonic Air Launched Offensive Anti-Surface (HALO) was a hypersonic air-launched anti-ship missile being developed for the United States Navy. It was designed to provide greater anti-surface warfare capability than the AGM-158C LRASM and was expected to be compatible with F/A-18E/F Super Hornet.
Source: Wikipedia — Hypersonic Air Launched Offensive Anti-Surface (CC BY-SA 4.0)