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Although in terms of risk it is better framed as big ship vs big ship. Because if they touch they are both going down. And both will be constrained in how far they can realistically detect and avoid the other. That is a fact with flying visually and that is why you have instrument flight rules and atc based separation. I know nothing about this location but theoretically ATC could take active steps to avoid conflict. They could change the arrival sequence to allow crossings. Send the arrivals around if need be. The crossing could take place above the airfield or further away to provide more vertical separation. .