Costly is relative. I’m sure Samsung could adapt the border-protection auto cannon turrets that they’re already producing in the thousands to ward off invasion by NK.

It’s a gun, on a turret, with some electronics.

It’ll be a thousand times cheaper than losing the cargo.

It’ll reduce insurance costs and “pay for itself” after just a few trips.

Speaking of which, a turret isn’t single use! It can sit there with minimal maintenance for dozens of trips, protecting tens of billions in cargo over its lifetime.