Seems they are using kilometers of fibre optic cables, so they fly tethered and communication can't be disrupted.
I'd hate to be part of the clean-up crew when that war ends. Broken fibre is nasty stuff.
I'll gladly take up the fibre clean up. You deal with the mines :)
I believe they’ve also deployed hybrid solutions: FPV fibre drones launched and piloted via link to an unmanned platform.
So a drone boat with good/secure signalling pulls up and a bunch of fibre optic drones launch from that point penetrating inland.