What is the maximum altitude (AGL) for flying IRs?

The maximum altitude for flying Instrument Routes (IRs) is 1,500 feet above ground level (AGL). This altitude is established to ensure safe and effective navigation for aircraft using IRs, allowing them to maintain a consistent and manageable height above terrain and obstacles, and also facilitating compliance with air traffic control requirements.

Flying at this altitude helps to reduce the risk of collision with obstacles that may be present at lower altitudes while still providing a clear path for navigation. Higher altitudes could introduce unwarranted complexity in terms of managing airspace and potential conflicts with other aircraft operating in different phases of flight. Additionally, maintaining this altitude allows for a balance between operational efficiency and safety standards set by regulatory bodies overseeing aviation operations.