本通告旨在向希望在现有机场引入新的大型飞机运营的成员国提供运营信息。它描述了一项重点研究无障碍区的尺寸，如附件14所述。该研究利用飞行模拟器和计算机模拟来研究F代码飞机在代码字母E机场停飞着陆时的碰撞概率。

The purpose of this circular is to provide operational information to Member States wishing to introduce new larger aeroplane operations at existing aerodromes. It describes a study focused on the dimensions of the obstacle free zone, as described in Annex 14. The study utilized flight simulators and computer simulations to investigate the probability of collision during a balked landing for code F aeroplane operations at code letter E aerodromes.