the same and contain the most basic instruments panels with respect to the mfd nd the display is decluttered for example only depicting immediately required information e g current route 72 if an emergency or failure is detected in the system a checklist 74 can be displayed the operator is forced to elect check off boxes 76 to assure that required checks are performed fig2 c demonstrates the additional decluttering created upon exceeding the secondary threshold in stress level 2 the efb 30 may be switched off by the biomonitoring system dependant on the flight phase an indicator 78 is provided to show that the system was switched off on purpose not due to power loss a function to return to the last displayed screen u201c one click u201d functions to access information for u201c nearest airport u201d u201c go around procedure chart u201d etc may be alternatively provided in case of a system failure the operator needs to focus on controlling the aircraft and on checklists as with stress level 1 previously described the pfd 36 remains unchanged the mfd 32 can be used to depict a checklist 80 comparable to that provided for stress level i but with enhanced sizing or color features the example includes a miniature depiction of the current flight plan 82 including current position and the next waypoint 84 only as well as the checklist checklist items for captain and first officer may be separated here in shown as u201c clear u201d items.