Speaker: Ruben Rabaneda Bueno, Biology Centre CAS, Czech Republic Session title: Visualizing Generalised Additive Models, an introduction to the package gratia This is a recording of a training session from the Training School on calculating positions in acoustic telemetry organized on 18-20 May 2022 in Ceske Budejovice, Czech Republic by the European Tracking Network COST Action (CA18102), supported by COST (European Cooperation in Science and Technology).