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commandmodulepilot:

Apollo 17 - Gene Cernan deploying the Traverse Gravitmeter Experiment (TGE) on a steep slope at Station 6 during the third an last EVA.

At each geology station, Gene took the TGE off the back of the Rover, put it down on the surface well out of the way, got it to sit securely upright, and pushed a button to start a measurement.  He could then do other work and, at a convenient time, pushed another button to display the result.