What critical knowledge pertaining to lunar descent navigation could not be actively maintained over five decades?
Answer
Critical knowledge pertaining to the specifics of lunar descent navigation
The half-century gap between the last Soviet soft lander attempt and Luna 25 represented a period where practical application of specific, complex skills related to controlled lunar descent could not be maintained or passed down effectively through active missions. This led to a situation where the modern mission relied on newer, less battle-tested software sequences for the critical landing phase, contrasting with the deeply ingrained, practiced expertise of the original space race era engineers.

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