Unmanned aircraft systems - Vocabulary Ingestion-build-73073 when used as fluid barriers

when used as fluid barriers and separation layer in the construction of underground structures (other than tunnels and associated structures)

including electro-optical devices

It also sets out what needs to be done at each stage

ATS service providers

Unmanned aircraft systems - Vocabulary Ingestion-build-73073 when used as fluid barriersWhat is ISO 21384 4 about? ISO 21384 series discusses unmanned aircraft systems ISO 21384 4 is one of the parts of the documents that define terms and definitions relating to unmanned aircraft systems that are widely used in science and technology. Who is ISO 21384 4 for? ISO 21384 4 on unmanned aircraft systems is applicable to: Civil aviation authorities and organizations Unmanned aircraft manufacturers Unmanned Aerial Systems (UAS) Aerial Vehicles