An aircraft is flying on a magnetic track of 075 degrees. The QNH is 1010. What is the lowest available flight level to fly in accordance with the quadrantal rule?
The answer depends on the interpretation of "quadrantal rule". An aircraft may fly at FL30 on a magnetic track of 075 degrees with the QNH at
any value without breaching Rule 34, known as the "Quadrantal rule and semi-circular rule".