New video shows a historic first: a Russian helicopter shot down by a surface-to-air missile from a drone boat. This tilts the balance of naval warfare towards the boats.

In the strikes near Cape Tarkhankut on Crimea’s west coast on Tuesday, a Magura V5 maritime drone equipped with missiles hit a Russian Mi-8 helicopter, Ukraine’s GUR spy agency said.

Footage appeared to show a missile launched from the sea and a helicopter falling from the sky. Ukraine's sea drones have proved a pivotal technology, helping it combat Russia's vast navy.