GNSS in civil aviation. Learning material for "winter training"

The main purpose of this publication is to increase the awareness of pilots in the use of GNSS. The Winter Training Brochure is oriented towards a brief and clear explanation of the basic principles and requirements for the correct and safe use of GNSS devices during the flight, with regard to the target group, pilots and instructors, different age, experience and skill categories.  The Winter Training Brochure is divided into three main parts, Part 1 addresses the basic theoretical bases and GNSS principles common for VFR and IFR flights, Part 2 deals with the principles of GNSS use for VFR flights, Part 3 deals with the principles of GNSS use for IFR flights.