IO540,
Apologies for subjecting yet another thread to the Drifter(tm) brand of tangentialization.
How does one navigate IFR OCAS, without a radar service? Map reading isn't practical, nor is it practical at 3km vis which a PPL can fly at "VFR".
Reading the ANO, those wonderful people at the CAA effectively state that DR in IMC is favourable to non FM Immune VOR tracking. Just more of the same?