There's additional (comparatively) low-cost actions that can be taken to avoid intercept such as: Make it autonomous (to avoid the cost and complexity of air c

There's additional (comparatively) low-cost actions that can be taken to avoid intercept such as: Make it autonomous (to avoid the cost and complexity of air conditioning and crew oxygen). Use an ADS-B/Mode-C receiver, FLIR camera, and AIS receiver to detect any nearby aircraft or vessels. If there's something nearby, dive. Monitor VHF and UHF airbands (and frequencies used by military tactical voice/data systems), and if there's any strongish signals there, assume that's a nearby aircraft, and dive. You don't need to know what is being transmitted -- just presence is enough. An uncrewed system means that endurance can be made very long -- so it's feasible to dive and stay down (with every noise-generating system shut down) indefinitely, multiple times, as evasive action. This application is latency insensitive -- as long as you can be assured that the cargo is still proceeding nominally, everything is fine.