Chinook stealth ops!
While stationed at RAF Abingdon we used to provide facilities for the SAS to practice hostage release using the airframes in storage there. First notice of this was the arrive of nondescript trucks and Range Rovers in our hangar with nondescript bods climbing out of said Range Rovers.
This was followed by lots of interesting gear being laid out on hangar floor and ladders being attached to the Range Rovers. The exercise then commenced with the Range Rovers approaching the airframe at speed with the SAS festooned around them to assault the airframe. Simultaneously an approach was made by a Chinook which hovered over the airframe to lower more SAS onto the aircraft. If the highjackers didn't realise what was going on by then they certainly did then as the target aircaft vibrated in the downwash and the sound echoed round Oxfordshire!!
Certainly not a stealth approach.
All very interesting to watch.