When setting up an aircrew contamination control area (ACCA), once the consistent wind direction is determined, the processing direction is established at?

The correct answer involves establishing the processing direction for an aircrew contamination control area (ACCA) based on a 45 to 60° deviation towards the wind direction. This angle is important because it allows for effective control of contaminants by ensuring that any potentially harmful substances are directed away from the processing area.

The processing direction is set at this angle to optimize the air flow, ensuring that pollutants do not drift back toward aircrew members who are being decontaminated or processed. Additionally, this angle helps to create a buffer zone that minimizes exposure risks.

Choosing this range of deviation is particularly effective in managing the unpredictable nature of wind patterns, while also ensuring that the contamination control remains efficient and effective. This systematic approach illustrates how strategic planning is vital in all facets of aircrew safety and contamination control.