SINGAPORE - In 1947, when the International Civil Aviation Organisation (ICAO) was set up as a United Nations arm to oversee commercial flights, one of the first things it did was to divide up the sky.
Safety was the priority and the objective was to ensure that the moment a plane took off anywhere in the world, it would be closely watched and guided until it landed.
Already a subscriber? Log in
Read the full story and more at $9.90/month
Get exclusive reports and insights with more than 500 subscriber-only articles every month
ST One Digital
$9.90/month
No contract
ST app access on 1 mobile device
Unlock these benefits
All subscriber-only content on ST app and straitstimes.com
Easy access any time via ST app on 1 mobile device
E-paper with 2-week archive so you won't miss out on content that matters to you
