An unmanned airship1, when operating in the vicinity of a flying manned aircraft, may distract pilots during critical stages of flight such as take-off or landing. There is a risk of unmanned airships launching into an uncontrolled flight and drifting into the path of an aircraft. Given the high speeds of manned aircraft, it is not easy for pilots to spot the smaller, slower-moving unmanned airships and avoid the collision. This could cause damage to the aircraft, and harm to the people and property on the ground.

How Do I Fly Unmanned Airships Safely?

Unmanned airships should not be conducted within these limits without a permit:

  • Within 5km of an airport/airbase
  • Higher than 200 feet above mean sea level outside 5km of an airport/airbase

Unmanned Airships 2

Do I Need To Notify CAAS To Fly Unmanned Airships?

Yes. If you are planning to fly unmanned airships within the area and height limits, you will need to submit a notification to CAAS.

When Do I Need A Permit To Fly Unmanned Airships?

A permit is required from CAAS when flying unmanned airships outside the area and height limits. Applications will be assessed on a case-by-case basis. It will take 7 working days to process your application, as assessment will be conducted in consultation with the Republic of Singapore Air Force (RSAF). 


1An airship (or blimp) is a power-driven aircraft that is kept buoyant by a body of gas that is lighter than air. An unmanned airship is steered remotely. Unmanned airships are commonly used for advertising purposes.

Last Updated on 24 March 2023