"All good and well to have 1Hz logging and a buffer or whatever, but most (all?) loggers keep this in volatile memory/RAM and only periodically flush to non-volatile storage, so just about no crash ever gets recorded. It's a tricky problem as volatile storage has write limits that would (possibly) be hit too early in their life if every fix was written out. "

The Oudie is self contained and has a buffer in non volatile memory. Naviter has retrieved this data from Oudies that have been in an accident.