If the pilot's static port is blocked, which selection is needed to resolve ADS indication without indicated errors?

When the pilot's static port is blocked, it can lead to inaccurate altitude and airspeed readings due to incorrect static pressure being sensed by the air data system (ADS). In such a scenario, switching to an alternative source of static pressure is essential to restore accurate data readings.

Selecting ADS 2 is effective because it typically relies on a different static source than ADS 1, which is tied to the blocked port. By using ADS 2, the pilot can circumvent the issues caused by the blockage, ensuring that the air data system can provide reliable indications for altitude and airspeed. This is crucial for maintaining situational awareness and safety during flight.

Other options might involve using different static sources or settings, but they would not provide the same level of assurance that ADS 2 would, which is specifically designed to offer redundancy in the event of a failure in the primary static system. Thus, selecting ADS 2 directly addresses the issue of the blocked pilot's static port without displaying indications of errors.