Schirra’s Stellar Navigation

John Glenn trains in a Mercury simulator, the Mercury Procedures Trainer. Credit: NASA

John Glenn trains in a Mercury simulator, the Mercury Procedures Trainer. Credit: NASA

Simulators have always been an integral part of spaceflight. In the case of the all important reentry and landing phase, simulators were like analogue versions Google Earth: reproductions of landscapes from specific altitudes taught astronauts to look for when lining up their spacecraft for reentry. But as Wally Schirra learned on his Sigma 7 flight, landing simulators can’t prepare you for everything.  [Read more…]