EGKK SID profiles
Good day,
Should I follow the SID vertical profile or remain at the initial altitude disregarding all other following constraints until I will get the clearance from the ATC?
For example, CLN4X departure. The initial is 4000' but SUNAV should be passed at 5000'. In case I don't have a contact to the London before SUNAV I have two options: to stay at 4000' or climb to 5000' according to the special warning on the chart.