The Air Force at Eglin Air Force Base organized the simulation, called Combat Hammer, to address one of the more pressing threats to the US navy -- attacks from swarming fast-attack craft.
In the Persian Gulf, Iran has repeatedly used small, agile attack craft to harass US Navy ships in dangerous encounters that could lead to a broader conflict in a moment's notice.
US Navy ships have had to go as far as firing warning shots at approaching vessels, but that was before Iranian-backed Houthi militants used a suicide boat laden with explosives to kill two aboard a Saudi Arabian Navy vessel off the coast of Yemen.
The Navy was already aware of the threat posed to their large, multimillion-dollar ships by small, cheap ships -- but the January Houthi attack demonstrated the threat was even more acute.
The Air Force's annual Combat Hammer exercise sought in part to answer the question of how the Navy would deal with a large mass of erratic attack craft -- and that involved A-10 Warthogs firing inert 30-millimeter rounds at unmanned ships.
I find the test being conducted to be more interesting than the results.