Most likely autonomous drone navigation (particularly very low altitude terrain following) and targeting. That is how cruise missiles work: https://en.wikipedi

Most likely autonomous drone navigation (particularly very low altitude terrain following) and targeting. That is how cruise missiles work: https://en.wikipedia.org/wiki/TERCOM https://en.wikipedia.org/wiki/TERCOM There was a big drone attack on a Saudi Arabian oil processing facility last year: https://en.wikipedia.org/wiki/2019_Abqaiq%E2%80%93Khurais_attack https://en.wikipedia.org/wiki/2019_Abqaiq%E2%80%93Khurais_at...