Related Clues:

• ''All systems go,'' in letters
• NASA assent
• ''Fine, Houston''
• ''Everything's fine!''
• 'Everything's fine!'
• Like a perfect launch
• Perfectly good
• Astronaut's 'thumbs-up'
• NASA's 'fine'
• Just peachy
• Green-light phrase
• 'Good here, Houston'
• "Everything's fine"
• Astronaut's 'yes'
• Perfectly all right