By the time the Apollo 16 mission was launched, the Apollo assembly lines had been shut down and NASA had already canceled 3 missions, even for ones that already had hardware built. After Apollo 16 there would be only one more mission to the moon.
With Apollo ending there was no new equipment to test, no new procedures to try, but, with proven equipment and procedures, the last two missions presented opportunities to clear some uncertainties in our understanding of the Moon.
Apollo 16 was the first study of highlands area. Selected surface experiments deployed, ultraviolet camera/spectrograph used for first time on Moon, and the Lunar Rover was used for the second time traveling 26.7 km. Three EVAs totaling 20 hours 14 minutes recovering 213 lbs of lunar samples. Lunar surface stay-time, 71 hours; in lunar orbit 126 hours, with 64 orbits. A sub-satellite was released in lunar orbit. Mattingly performed 1-hour trans-Earth EVA.
John W. Young , Commander
Charles M. Duke Jr. , Lunar Module Pilot
Thomas K. Mattingly II , Command Module Pilot
April 16, 1972; 12:54:00:567 p.m. EST
Launch Pad 39A
April 27, 1972
Recovery Ship: USS Ticonderoga