How did NASA know exactly where Apollo 13 would land?

Apollo 13. Apollo 13 insignia. Credits: NASA. "Houston, we've had a problem..." Mission Objective Apollo 13 was supposed to land in the Fra Mauro area. .... The ground and crew then knew they could do the five-minute P.C. + 2 burn with assurance, cutting the total time of their voyage to about 142 hours. read more

Apollo 13 was supposed to land in the Fra Mauro area. An explosion on board forced Apollo 13 to circle the moon without landing. The Fra Mauro site was reassigned to Apollo 14. read more

Apollo 13 was supposed to be NASA's third moon-landing mission. Instead, in an instant, the spacecraft pivoted from a moon-bound landing unit to a crippled vessel. The spaceflight stands today as a demonstration of NASA innovation saving lives on the fly, and vividly illustrates the dangers of working in space as well. read more