777 FMC: direct to with abeam points
Flying through Warsaw FIR recently, we were cleared direct from EGL to Lusid - about 320ish nm. We used the FMC abeam points facility - all well and good. I noticed (for the first time - but it seems to happen consistently) that at every abeam point there was a small but pronounced turn. I realise a direct track course will change following more or less a Great Circle, but the course change happened specifically at the abeam points. The FMC showed the course changing by five degrees (310-305) via about eight abeam points - that's quite a pronounced change over such a short distance isn't it? I'm sure my old type (737NG) maintained a 'straighter' (so to speak) track crossing similar abeams. Anybody else notice this? Any ideas why?
Puzzled FO