How long where Buzz Aldrin 's EVA sessions in November 1966 ?
In 1970 , after Apollo 13 was crippled by the rupture of a Service Module oxygen tank , Jack Swigert 's Speedmaster was famously used to precisely time the critical 14 - second Mid-Course Correction 7 burn using the Lunar Module 's Reaction Control System , which allowed for the crew 's safe return .