625 utmu space is foreseen to accommodate the use of

6.25 UTM/U-Space is foreseen to accommodate the use of UAS at lower flight levels, independent of their purpose
(for recreational use or for commercial use). This could include transport of people or goods, or Uber’s flying
UAS taxis.
6.26 Given that Hong Kong is congested with busy cross boundary as well as local air traffic, it is unclear at this stage
if UTM and/or U-Space is feasible in Hong Kong.
UAS-Cloud / U-Cloud
6.27 The December 2015 Interim Provisions on Light and Small Unmanned Aircraft Operations (UAS Operation
Provisions) issued by the Civil Aviation Administration of China (CAAC), regulates the operation of unmanned
aircraft systems (UAS) with a maximum empty weight of 116 kg or less, or a maximum take-off gross weight of
150 kg or less, and a calibrated air speed of no greater than 100 km per hour. UAS weighing 1.5 kg or less are
generally not required to follow the Provisions.
6.28 The UAS Operation Provisions set forth an online, real-time supervision system comprising the electric fence
and the UAS Cloud [24]. The electric fence is a system consisting of hardware and software that stops aircraft
from entering certain areas. The UAS Cloud is a dynamic database management system that monitors flight
data, which has an alarm function for UAS connected to it that is activated when these UAS fly into the electric
fence. A UAS Cloud system developed by the Aircraft Owners and Pilots Association of China, “U-Cloud,” has
been approved for operation during a two-year period from March 4, 2016, to March 3, 2018 by the CAAC.
6.29 UAS under certain specific categories must install and use the electric fence and connect to the UAS Cloud.
Operators must report at least every second when in densely populated areas and at least every thirty seconds
when in non-densely populated areas. UAS under other categories are required to install and use the electric
fence, connect to the UAS Cloud, and report at least every second if they are operated above the airspace of
key areas and in airport clear zones. Key areas is defined by the Provisions to include military sites, nuclear
plants, administrative centres and their neighbouring areas, and areas temporarily designated as key areas by

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local governments. From available information [24], it does not become clear what the system requirements
are for those UAS required to report to the UAS cloud.
6.30 Given that Hong Kong is a densely populated city with a lot of high-rise buildings, it is unclear if the Hong Kong
environment may benefit from potential application of UAS Cloud.
Drone Apps (drone maps, weather information etc)
6.31 These are apps for no-fly zones for UAS or even weather information. These apps (mostly by private developers)
allows the user to make flight plans, to get warnings in case the UAS is in the vicinity of a no-fly zone, and may
have a flight log capability. After analysing almost 30 available apps [25], the main conclusions are:
• Almost all apps can be downloaded for free or have a free basic version
• None of the apps contains airspace information that is 100% correct
• For many apps it is unclear what the source of the information is
• For many apps it is unclear if the governments or other bodies can influence the representation of the no-
fly zones
• For many apps the dynamic update of the no-fly zones is not integrated.