You accept the mission.
Your ground crew is ready.
All systems are go.
Start automatic ground launch sequencer.
Start auxiliary power units.
Arm solid rocket booster range safety safe and arm devices.
Crew members close and lock their visors.
Ground launch sequencer is go for auto sequence start.
Activate launch pad sound suppression system.
Activate main engine hydrogen burnoff system.
Main engine start.
T-Minus 9, 8, 7, 6, 5, 4…