Wondering how jumpseat works in cargo carriers? How come most of them need to be in CASS in order to get jumpseat? I heard someplace saying because the 747 freighter doesn't have a cockpit door, so that's why the carrier needs to be CASS? is that right?

I noticed Kalitta doesn't have any jumpseat info.. How hard to get a carrier to get recip. js agreement with most legacies?? I'd love to fly freight, but without the JS privilege, it's tough to go see the folks once in a while...