Originally Posted by
dicks-airbus
Why bother going to FL450 and then back to FL295 and making a lot of unexplainable turns?
Too many whys
The lobe patterns for some primary radars may limit their high altitude coverage.
The routing may have been designed to skirt the presumed edge of some search radars.
The reduction of height to 295 may also have been planned to get below long range cover of the ground radars.
All you would need to plan a dark route is knowledge of the capabilities of the different radar systems and knowledge of their location.
Routing along an FIR boundary could be used to engender 'ownership' confusion between Indonesia and Malaysia etc.
All pretty easy stuff for a technically savvy person.