IFR – Instrument flight rules
Compared to VFR flights, IFR uses instruments inside the plane to navigate from one point to the other. Thanks to this equipment, IFR flights are not restricted by weather and/or lack of visibility.
VFR – Visual flight rules
As per the definition of the acronym, VFR stands for flights that are conducted without the support of instruments. The pilot navigates according to visual references like terrestrial navigation, or according basic navigation instruments, like NDB’s or VOR’s. The flight must be conducted under visual meteorological conditions, which allow a safe flight.
MIL – Military flight rules
Military flights differs from Civil flights for the operations conducted. However they do not differs in terms of flying rules. As Civil flights, Military flights follows VFR or IFR rules as required.