What is the relationship between flying and aviation in the context of the input sentence. Choose an answer from: product/material produced; manufacturer; distributed by; industry; position held; original broadcaster; owned by; founded by; distribution format; headquarters location; stock exchange; currency; parent organization; chief executive officer; director/manager; owner of; operator; member of; employer; chairperson; platform; subsidiary; legal form; publisher; developer; brand; business division; location of formation; creator.

Our initial designs are based on the following parameters: a targeted Mach 3 certified delta wing vehicle, a cabin design that would accommodate from 9 to 19 passengers flying in an altitude above 60,000 feet and a vehicle design that aims to help lead the way towards state-of-the-art sustainable aviation fuel.

Answer: industry