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Detail of the function selector and indicators in the center of the top of the launch console.

The large red arrow reads "Function Selector".

The two indicators above the function selector are labelled "Plug 1-3 Connected" and "Explosive Rivets Safe". The indicator to the left of the function selector reads "Test", and the one to the right reads "Launch". The indicator immediately below the selector reads "Ground Power".

The six rows of indicators read

• "750 Press OK" and "LOX Tank Pressurized"
• "450 Press OK" and "Missile Power"
• "Explosive Rivets Hot" and "LOX Valve Open"
• "Ignition Links OK" and "Ignition Alc. Valve"
• "Plug Ejection Link OK" and "Main Stage Command"
• "Fuel Tank Pressurized" and "Main Fuel Valves"