# Holographic Mixed Reality System for Air Traffic Control and Management
## 3 User Survey
\begin{table}
\begin{tabular}{p{113.8 pt} p{113.8 pt} p{113.8 pt} p{113.8 pt}} \hline \hline
**Question** & \multicolumn{2}{c}{**Response Results**} \\ \hline Please give an estimated number of difficult incidents or problems during the execution of control work & Average of participants: 4.6 times per month & Average of participants: 4.6 times per month \\ \hline \multirow{4}{*}{Please concretely describe the difficult incidents or problems that have occurred.} & (P1) It is difficult to ensure safe separation between aircraft in the jurisdiction when aircraft landing is difficult due to bad weather conditions & \\  & (P2) When an open airplane stops without fully departing from the runway, affecting other aircraft & \\  & (P3) When airplanes are tangled so that the flow is not smooth & \\  & (P4) When pilot reaction time and maneuver time are delayed, affecting other aircraft & \\  & (P5) Bad radio, inaccurate radar data & \\ \hline What was the severity of the difficult incidents or problems? & Not serious at all & Not very serious & Moderate serious & Very serious \\  & & P1 & P2, P4, P5 & P3 \\ \hline \multirow{4}{*}{What are your concerns about the above problems?} & (P1) Possibility of accident due to difficulties in safe separation because of bad weather conditions, increase in the possibility of runway incursion due to blind areas & \\  & (P2) Bottlenecks in moving aircraft on the ground & \\  & (P3) Accidents caused by runway incursions & \\  & (P4) Increase in air traffic controller workload due to aircraft exceeding the airport’s capacity to accommodate aircraft & \\  & (P5) Possibility of accident due to low reliability of radar data & \\ \hline \multirow{4}{*}{What efforts do you make to minimize recurrence when difficult incidents or problems occur?} & (P1) Calling meetings of all workers in control tower/control station & \\  & (P2) Calling meetings and training by relevant work seat & \\  & (P3) Candic questions of all team heads by job of the control tower/control station & \\  & (P2) Letting meetings and training of all workers in the control tower/control station & \\  & (P3) Calling meetings and training of all workers in the control tower/control station & \\  & (P4) Notifying related organizations & \\  & (P5) Notifying the equipment manager and requesting handling & \\ \hline \multirow{4}{*}{As for calling a meeting or education for the prevention of recurrence, what methods do you think are appropriate?} & (P1) Conduct situation revival, discussion or training at conference table & \\  & (P2) Conduct situation revival, discussion or training at conference table & \\  & (P3) Conduct discussion or training while viewing the point where the problem & \\  & (P3) Conduct discussion or training while viewing the point where the problem & \\  & (P4) Equipment support first & \\  & (P5) Visit the place where the problem occurred in person and conduct discussion or education & \\ \hline What flight information do you mainly refer to during work? & (A) Flight name, aircraft type, position, speed, altitude, heading, squawk code, aircraft, arrival airport, crash alarm & \\ \hline Do you think it would be helpful if visual information, such as text, was provided to supplement problems in communication with voice during work? & (P1) Should be quite helpful—there is a possibility of be different interpretations due to differences in pronunciations and accents. & \\  & (P2) Moderate—the problem of communication cannot be solved with visual information in many cases & \\  & (P3) Will not be helpful—not good for safety when eyes are distracted & \\  & (P4) Moderate & \\  & (P5) Moderate & \\ \hline \multirow{4}{*}{How do you perform your work in low visibility conditions? Please write if there is anything different from usual.} & (P1) Provides information actively in the event of strong winds and wind shear & \\  &  Take measures such as increasing the separation between aircraft & \\ \cline{1-1}  & (P2) Try to control a small number of aircraft at a time and strictly apply safe separation & \\ \cline{1-1}  & (P3) Runway lighting—adjust brightly, apply rigorous ground motion procedures & \\ \cline{1-1}  & (P4) Increase separation between aircraft & \\ \cline{1-1}  & (P5) Increase separation between aircraft, due to low reliability of equipment, operated & \\ \cline{1-1}  & & based on experience of air traffic controllers & \\ \hline \hline \end{tabular}
\end{table}