Google believes it is on course to have enough internet-beaming balloons in the stratosphere to form a ring over part of the world next year.
It told the BBC the move would let it trial a continuous data service to people living below the balloons’ path.
The declaration coincides with the announcement that three of Indonesia’s mobile networks intend to start testing Project Loon’s transmissions next year.
One expert said the plan had benefits over other solutions.
Sri Lanka previously signed a separate agreement signalling its wish to be another participant in the giant helium balloon-based scheme.
Beneath each lighter-than-air balloon are hung:
- two radio transceivers to receive and send data streams, plus a third back-up radio
- a flight computer and GPS location tracker
- an altitude control system, which is used to move the balloon up and down to find winds that will take it in the desired direction
- solar panels to power all the gear