Clearance.
Estimate for Oceanic Entry
After obtaining and reading back the clearance, the pilot should monitor the forward estimate
for oceanic entry, and if this changes by 3 minutes or more, should pass a revised estimate
to ATC. As planned longitudinal spacing by these OACs is based solely on the estimated
times over the oceanic entry fix or boundary, failure to adhere to this ETA amendment
procedure may jeopardise planned separation between aircraft, thus resulting in a
subsequent re-clearance to a less economical track/flight level for the complete crossing.
Any such failure may also penalise following aircraft.
.
This is what our manual says......is it out of date.....or was this never correct?