Hi there,
Thanks Ron for sharing this clip. I've taken a look at FR24 and ADSB data.
A few minutes before reaching SUNOT.
-- NAX1AJ (the Norshuttle) was at FL370 and at 510 knots GS approximately.
-- KLM671, was at FL370 and at 470 knots GS approximately.
Apparently when receiving OCC clearance, NAX had been cleared to cross SUNOT at 15:22 - which they won't comply since they are showing to cross at 23 now. A minute later than cleared and planned.
Although not mentioned, I assume KLM OCC clearance was to cross SUNOT at 15:26 (4 minute separation with precedent). This is why KLM gets angry because they're doing things correctly and proceeding according to their SUNOT time. For those not familiar, SUNOT is the entry point for the Shanwick OCA.
KLM finally assumed higher level to keep going on Track C so I'm sure it was not such a big deal for them as the Captain showed on frequency. It would have been worse if their highest FL available at that point were FL370, unable to climb any higher, and therefore being forced to make a dogleg or change to Track D as they were informed.
Oceanic Operations are indeed very interesting