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Some system are able to dead-reckon for a while after losing GPS or other sources providing positional feedback. If the estimated position error grows above the failsafe threshold, the system enters a failsafe mode. As the position error estimate is growing linerly over time, and it is recommended to take action before entering the failsafe, we here warn the user about the imminent failsafe and propose to take manual control. --------- Signed-off-by: Silvan Fuhrer <silvan@auterion.com>