Airways clearance question
Hey guys. Newish PPL holder here. Just a quick question about requesting airways clearance.
Say I was departing a CTAF underneath the class C airspace steps and my flight plan was to climb up into the class C airspace and transit through it. When do/can I contact centre for airways clearance? Can I do it on the ground at the CTAF?
For example there are numerous CTAFs under the class C steps around Melbourne where this would occur. What is the normal process?
Thanks in advance!