> When visual approaches are allowed, controllers can tell pilots to maintain visual separation from other aircraft, so they don’t have to leave as much of a bu

> When visual approaches are allowed, controllers can tell pilots to maintain visual separation from other aircraft, so they don’t have to leave as much of a buffer as with an instrument landing (where it’s entirely on the controllers to provide proper spacing). From an incident at SFO where a Luftansa plane was not allowed to perform a landing using visual separation at night, and therefore was delayed interminably: https://onemileatatime.com/news/lufthansa-a350-oakland-diversion/ https://onemileatatime.com/news/lufthansa-a350-oakland-diver...