Under what conditions can simultaneous operations on parallel runways in the same direction be authorized?

Simultaneous operations on parallel runways in the same direction can be authorized under VFR (Visual Flight Rules) conditions with visual separation because this allows pilots and air traffic controllers to maintain adequate spacing between aircraft visually. In VFR conditions, pilots are expected to see and avoid one another, thus enabling them to certify that they maintain safe distances while taking off or landing concurrently on adjacent parallel runways.

Visual separation is critical in this scenario since it relies on the ability of pilots to see other aircraft and adjust their operations accordingly, ensuring safety during these simultaneous maneuvers. By permitting this practice under visual conditions, it acknowledges the roles of both the pilots and controllers in maintaining the safety of operations, assuming that all visual cues and distances are properly adhered to.

Other options are limits or specific situations that do not allow for such operations. For example, instrument conditions often imply reduced visibility, making visual separation impossible. When one aircraft is departing or confirming safety logic systems do not adequately prioritize the need for visual awareness which is essential in VFR contexts.