To me It just means the missile is “capable” at flying that low. Operationally not even US and Israeli CMs fly that low and they have some of the best terrain mapping in the world.well the poster says 45 min at 10m AGL and then 450 km at 10m AGL
also it says it have a service ceiling of 30 t0 30000 Feet and claim its speed is 900km
Has Iran shown off it’s terrain mapping technology? Given the lack of satellites I assume they would be buying it from Russia or China.
But to fly below 25 meters you need extremely high confidence there isn’t an unknown object along the way especially if the CM is changing its flight path routinely. Maybe the use of forward radar and avoidance Algos can help in lieu of up to date terrain mapping.