The article concerns the issue of using imagery reconnaissance sensors for the identification of geological-engineering conditions in river channels, in the aspect of evaluating the forcing of a water obstacle. It discusses the issues associated with using air platforms (manned and unmanned) in remote sensing surveying of selected fragments of the Vistula and Bug river channels and the correct interpretation of the obtained results, through their verification using bathymetric tests conducted directly in the river channels.

The research problem raised in the article is gathering experience and determining the possibilities of implementing modern forms of training used when training candidates for air traffic controllers. For the exercise of determining the separation time between aircraft with different maximum take-off masses, an application was created as part of the research program. As the applied research method, trainees' testing of the developed application at the training center can be considered. They had the opportunity to test the functionality and usefulness of software and ergonomics of created application. During application testing, students shared numerous comments on the usability and application's functions. It was confirmed that virtual reality helps recognize the silhouettes of aircraft and their learning thanks to the possibility of their actual presentation. The possibility of training the use of separation in air traffic before the simulator training starts would lead to preparation and visualization of theoretical knowledge in practical application. Creating an application to determine the separation time between aircraft with different maximum take-off masses has excellent potential for use in the training center. The development of the application consisting in extending this possibility would allow creating a tool that, in addition to training, would also be used as software for conducting internal examinations of the acquired knowledge during the subsequent stages of training.

This article presents the preparation and performance of tests of a GPS receiver in terms of confirming the selected technical parameters. Due to impossibility to carry out the tests with the use of classic ground methods, an unconventional method that uses a Sonex LL air platform was developed.