If going by the book, the pilot probably would have to ask for clearance (although maybe not if they're over international waters?), but it really is a button p

If going by the book, the pilot probably would have to ask for clearance (although maybe not if they're over international waters?), but it really is a button press (or two of them): https://www.youtube.com/watch?v=rEf35NtlBLg&t=705s https://www.youtube.com/watch?v=rEf35NtlBLg&t=705s