Docent Spotlight: Dirk Dedoes

On August 21, 2007, the crew aboard the Space Shuttle Endeavour hurriedly completed their pre-landing checklists. Although these tasks had been performed hundreds of times before on previous shuttle missions, this time was different. Mission STS-118 would be the first time a Space Shuttle would navigate from reentry to landing using the Global Positioning System (GPS) in place of traditional terrestrially-based TACAN navigation.

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