Instrument Rating Exam · Practice

En route in Australian upper airspace, the standard RNP is RNP 2. This means the aircraft navigation system must keep the aircraft within:

• A.2 NM of the centre line 68% of the time, with a further containment allowance
• B.±2 NM horizontally and ±200 ft vertically throughout the cruise segment
• C.2 NM of the centre line 95% of the time — a total system error of ≤2 NM
• D.A 2 km corridor rather than nautical miles, measured either side of track