點解飛機起飛要打開遮光板?

飛機起飛同降落嘅時候（係最危險嘅時刻），機組人員都會叫乘客打開遮光板嘅，美其名係叫你欣賞窗外風景或者夜景，其實主要目的係等乘客睇吓機倉外面嘅情況（由其是係機翼位置），因為萬一睇到有乜嘢事發生（如引擎著火，組件脫落等），乘客嘅本能係會即刻通知機組人員嘅，因為單靠機組人員係睇唔晒全架機外面嘅情況.

原因係飛機在起飛爬升時是最高危的時刻,往往意外多數在這時發生,要乘客打開遮光板目的是萬一飛機出了意外時,好讓搶救人員能夠洞悉內裡情況以方便救援.

There are a number of reason behind this issue... And many of these are related to safety issue as the aircraft is most dangerious during take off/landing...
1) Having window shild open will allow passenger at window seat to look out and see if anything goes wrong with the aircraft on/over/under the wing... As the pilot will not have the sight to do so... So if the passenger spot anything wrong, they can inform the cabin crew right away... So they can have a look and also to inform the captain when necessary...
2) Having the window shild open and light inside the cabin off... This will allow passenger to get use to the light outside, so if anything goes wrong, passenger can get out quickly and can easily get use to the environment outside...