UK Controlled Airspace is complex and congested; traffic is often oriented on the airway in certain directions or flows.
Therefore, if able, pilots should remain on the assigned route or track whilst carrying out the emergency descent; unless to do so otherwise would endanger the aircraft.
If a turn away from an assigned route or track is initiated, pilots should note that they may not be aware of traffic in their proximity (especially if flying on an assigned heading): nor of aircraft below them, not on the selected frequency, in adjacent airspace sectors. However, it is ultimately the pilot's responsibility to take the action most appropriate in the circumstances.
以下中文翻译：
英国管制空域复杂且拥挤；交通流量通常按照特定方向或流向在航路上定向。
因此，如果可能的话，飞行员在执行紧急下降时应保持在指定的航路或航迹上；除非继续保持原航路会危及航空器安全。
如果开始偏离指定的航路或航迹，飞行员应注意他们可能不了解附近的交通情况（特别是在按指定航向飞行时），也不了解下方的航空器情况，这些航空器可能不在所选频率上，位于相邻的空域扇区内。然而，最终由飞行员负责在具体情况下采取最合适的行动。