The Duty of One who doesn't know the Direction of Qiblah
Issue No.69- If one does not know the direction of the qiblah, he should try to find it, and if there is no way to find it, he should try to delay using the toilet, if possible. However, in case of an urgent situation, there will be no problem in sitting in any direction. The same ruling must be observed in aeroplanes and trains also.