Probably all of us say goodbye to 2020 with relief. We will certainly remember it as a time of pandemic fight, of sanitary restrictions and of the daily difficulties that we all had to face. For companies in almost all sectors, the past year was extremely difficult and left its mark on their operations for years to come. Our company, like many others, was forced to react quickly to the new reality. The pandemic has forced us to introduce new forms of sales, such as via the internet and online trainings. In the previous year, the pandemic has left its mark on the aviation market, especially the international one. BA and GA were affected to a lesser degree. Many aircraft owners used this pandemic time to upgrade the avionics on their aircraft. Our Design Office and PART145 Service Organization were busy. In recent months, they have completed several interesting avionics modernization projects on Cessna aircraft. One of them is widely described in this issue.