Related Clues:

• Fine, to NASA
• Running perfectly
• NASA 'thumbs up'
• All right
• In position
• Poised for action
• Done cooking
• First word of a three-word command
• 'Set?'
• 'No problemo!'
• Letters of satisfaction
• Perfect, at NASA
• Flawless
• Available now
• With 11-Down, words before "here I come!"