7.3.1-4 Unique Commands for Destructive and Safety-Significant Commands

Unique commands associated with actions that have important consequences should not be easily confused with other commands used in the same or different modes.

Additional Information:
Reserving special commands for special actions can prevent mode errors because, if the command is entered while the device is in the wrong mode, it will not be accepted by the system. A unique or reserved command should not be so similar to other commands that a valid entry may result from incorrectly entering another command. For example, if the command 'CNTL X' is reserved for a special action, then similar commands, such as 'ALT X' and 'Shift X,' should not be valid, even in other modes. The combination of a mode error and the incorrect entry of the command may execute an unintended action.