Wed Apr 05, 2017 10:51 pm
#1528512
PaulB wrote:Outside CAS I've not been asked for my passing altitude when requesting a basic service.
It depends on the type of squawk being allocated.
Some squawks, such as conspicuity squawks, are annotated in the AIP (enr 1.6, section 2.6) as being 'altitude unverified and unreliable' - in which case there is no need for the ATCO to verify your altitude (albeit many units still do for good measure).
e.g. If I leave Doncaster VFR they will typically put me on their 6160 conspicuity squawk with no need to verify altitude, but if I depart IFR they will allocate me a unique squawk which requires altitude verification .... rather than think about what type of squawk I've got, it's just easier to always include the passing altitude.