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Brief Description: A crewmember or viewer wants to view the data from the sensors in a graph, to do this they place their desired graph in their tab.

1. The crewmember is going to add a new graph to his tab.

3. The crewmember selects the desired sensor to add a graph from.

5. The crewmember selects the desired type of graph to add to the tab

2. System shows all sensors to choose a graph from.

4. System shows all graph that are included in the current selection.

6. System adds the graph to the tab.

2a. There are no sensors available in the database.
      end of usecase.

4a. There are no graphs available that are linked with the shown sensors.
      end of usecase.