Mr. Mittal, your question is quite ambiguous, as I cannot understand whether you are asking about flying technology, materials or target detection technology.

It's compulsory the UAV to be fixed wing with that autonomy. Europe is increasing a lot this kind of airships in the Mediterranean sea for borders patrolling. As the other researcher has replied, I think that a small catapult could be interesting.

I'm almost sure that the UAV should be human controlled, but it could equip some vision cameras with artificial intelligence for target detection.