## 3 Results
### Implementation Phase  
The implementation phase takes place by announcing a simulated emergency according to the approved exercise plan and is completed by the implementation of rescue and clean-up operations by the involved IRS units. Nowadays, there are many modern technologies for the implementation of exercises, which use a variety of software equipment. One of these technologies is virtual reality technology, which is gradually building its place in the IRS. According to [PERSON] [18], virtual reality can be defined as \"an advanced user interface that includes a simulation of a real environment in real-time, where the user interacts through several sensory channels (sight, hearing, touch, smell, and taste)\". Exercises with the help of this technology do not have to take place in real situations, but with the help of simulators they can be embedded in the overall simulation and thus carry out the implementation of the exercises as they were determined in the preparatory phase. Virtual reality is predominant in the field of fire protection. An example is the FLAIM Trainer, which is a configurable and mobile training system. This simulator simulates a realistic rendering of the effects of smoke, fire, water, and foam and corresponds exactly to the physical settings of the nozzles and power. It is thus possible to simulate the fire-fighting conditions that firefighters experience in real situations. [PERSON], [PERSON], et al. [19] describe the possibilities of integrating a virtual reality platform with numerical simulation tools for reproducing a fire scenario and use FLAIM Trainer for this purpose. To take advantage of virtual reality, it is necessary to have the right equipment. For these purposes, it is necessary to have hardware (PC) with VR support, a VR headset (e.g., \begin{table}
\begin{tabular}{c c c c} \hline \hline
**Function** & **PRACTICE** & **TerEx** & **Pathfinder** \\ \hline Affordability & Unspecified & Unspecified & \$ 2250–3375 \\ Time intervals & Yes & No & Yes \\ Programme training intervals & Individual & Individual & Individual \\ Graphic display & Yes & Yes & Yes \\ Event schedule & Yes & No & No \\ Map materials & No & Yes & No \\ Mobile device & No & No & No \\ Possibility to run on a web portal & Yes & Yes & No \\ Possibility to insert documents & Yes & No & No \\ The demand of programme operation & Medium & Low & High \\ Creating scenarios & Yes & No & No \\ Demarcation of participants & Yes & No & Yes \\ \hline \hline \end{tabular}
\end{table} 
Table 1: Comparison of programme tools for the preparatory phase. HTC VIVE, OCULUS), and software (3D tools, Steam VR, and others). A preview of HTC Vive pro is shown in Figure 12.  
Another technology is augmented reality technology. [PERSON] et al. [20] define augmented reality as \"the enrichment of reality with artificial virtual content\". This technology can be used with smart devices (smartphones, tablets), or newer technologies in the form of headsets can be used. Similar to VR technology, AR is increasingly focusing on the use of headsets in the workplace, and so far, the headset seems to be the most sophisticated option. A suitable example can be considered Hololens 2 ([PERSON], WA, USA) from Microsoft. ARinVR: Bringing Mobile AR into VR, [PERSON], et al. [21] emphasize the issue of screen size in smart devices. Although smart devices are among the most common platforms for AR, the size of the screens limits the use of this technology, even with limited performance and user experience. For the area of IRS and exercises, this technology is offered for displaying simulations of events in which the IRS participates. It is also possible to use standard activities, which determine the procedures for rescue and liquidation work. One of the possibilities is, for example, to display the plan of the progress of the components at the intervention commander or the exercise schedule, where it would also be possible to take shots of the whole course using installed cameras in either a smart device or Hololens 2.