Line Up And Wait (LUAW) Used by ATC to inform a pilot to taxi onto the departure runway to line up and wait. It is not authorization for takeoff. It is used when takeoff clearance cannot immediately be issued because of traffic or other reasons. 

"We are excited to accelerate the adoption of electric aviation technology and further our journey towards a sustainable future. The agreement with magniX underscores our commitment to revolutionize commercial aviation with electric propulsion and to pave the way for cleaner, quieter, and more efficient air travel." Source: Bert van der Stege, CEO of Harbour Air, in comments made as magniX entered into a Letter of Intent with Harbour Air to supply 50 magni650 electric engines.