Additionally, twelve short sampling stops were made at Schmitt's discretion while riding the rover, during which the astronauts used a handled scoop to get a sample, without dismounting. During lunar-surface operations, Commander Cernan always drove the rover, while Lunar Module Pilot Schmitt was a passenger who assisted with navigation. This division of responsibilities between the two crew positions was used consistently throughout Apollo's J-missions.
The lunar surface operations involved a division of labor between the commander and pilot, with Cernan driving the rover and Schmitt assisting with navigation.  This pattern of crew roles was consistent across all Apollo J-missions.