The IFR clearance is an authorisation delivered by the Delivery Controler to IFR flights with a filled flight plan. This clearance contains a number of instructions detailled bellow that must be followed by the departing aircraft.
A departure clearance must contains the following elements:
The SID
The SID or Standard Instrument Departure, is a specific route linked the departure airport with the first point/fix of a flight plan.
These departure routings are published on charts illustrating the trajectory on a ground projection, they also contain altitude and/or speed restrictions as well as any specific procedures if any exists.
The initial climb
The initial altitude or level is confirmed by the Delivery controler even if it is published on the chart, this is done on the network as a mitigation to single pilot operations.
If the initial climb is an altitude, you must give the QNH after the cleared altitude unless the pilot has reported having the latest valid ATIS information when requesting clearance.
Once the initial level or altitude is readback the traffic is expected to climb to and maintain this altitude while complying with all restrictions if they exist.
The departure runway
This is the runway the pilot can plan for departure.
The squawk code
The squawk code is an identification code to be entered in the aircraft's transponder. This code allows the radar controlers (APP & ENR) to correctly identify a radar track.
The code varies depending on :
Even though most airfields in France have published departure routings, some aircraft may not be able to follow them. In this situation a radar vectoring is provided to the first flight plan point; this is an omnidirectionnal departure.
An omnidirectionnal departure clearance must contains the following elements:
A correct readback of allways required but the controler must be vigilent with omnidirectional departure clearances readback due to the rarity of these and the profeciency of pilots to understand them.