For a VFR flight in real life, you do not have to file a flightplan. In our virtual world however, a flightplan should always be filed.
VFR stands for Visual Flight Rules. The pilot must fly and navigate with visual reference to the surface. Due to this, there are certain weather criteria that must be met for a VFR flight to take place.
VFR flights are not permitted in Class A airspace, so there are no criteria.
There is no Class B airspace within the UK, so we will not explain the criteria.
Requirements for VFR flight in Class C, D and E airspace
At or above FL100:
An aircraft is deemed to have complied with the below FL100 restrictions if the aircraft is not a helicopter and it flies at or below 3,000ft amsl, it flies at a speed which is 140KIAS or less, remains clear of cloud, with the surface in sight and an in flight visibility of at least 5km.
If it is a helicopter, it is deemed to have complied with the below FL100 restrictions if it flies at or below 3,000ft amsl, it remains clear of cloud, with the surface in sight and an in flight visibility of at least 1,500 metres.
Entering and leaving a control zone
There are 2 ways to depart a control zone; A random route with a direction or a specified route. A random route may be something as simple as "Cleared to the southern zone boundary with a left turn out". In this case, the aircraft would turn left after departure and fly towards the southern zone boundary.
A specified route takes an aircraft from the airfield, along a route (which usually follows geographical features such as roads, railways and rivers) to a Visual Reference Point at the edge of the zone boundary.