What requirements must be followed for flights operated at FL 280 or above within controlled airspace in Muscat FIR?

In Muscat Flight Information Region (FIR), any aircraft flying at Flight Level (FL) 280 or above within controlled airspace must adhere to specific requirements to ensure safe and efficient operations. Among these, RNAV 5 is essential as it establishes navigation accuracy criteria that aircraft must meet for optimal operation in controlled airspace, particularly at higher altitudes.

RNAV 5 allows for the continuous active navigation within the specified lateral limits, ensuring that aircraft can maintain a precise flight path. This capability is critical for air traffic management, enabling air traffic controllers to safely manage aircraft separation, especially in busy airspace. Using RNAV 5 facilitates enhanced operational efficiency and contributes to reduced airspace congestion.

While RNAV 1 and RNAV 10 are valuable navigation specifications, they are not specifically mandated for operations at FL 280 in Muscat FIR. RVSM, or Reduced Vertical Separation Minimum, also plays a significant role in vertical spacing for aircraft but does not directly address the navigation accuracy requirements. Therefore, the focus on RNAV 5 reflects actionable standards for navigation required for these higher altitudes within the controlled airspace of Muscat FIR.