Apollo 16 prime crew aboard the NASA Motor Vessel Retriever during training
Description: The Apollo 16 prime crew relax aboard the NASA Motor Vessel Retriever during water egress training activity in the Gulf of Mexico. They are, left to right, Astronauts Thomas K. Mattingly II, command module pilot; John W. Young, commander; and Charles M. Duke J.r, lunar module pilot. The Command Module trainer was used in the training exercise.
