And you think the TCAS is correctly calibrated on those old Russki heaps flying RVSM in Africa
Silly thing to do though in 'working' airspace, but having had 3 different aeroplanes (one flying outbound along the localiser at my inbound level, one in restricted airspace where he wasn't supposed to be and the last bust his level in Brussels airspace and very nearly took us out) try to hit me over my career I'm inclined to let others know where I am....