Related Clues:

• Just perfect
• Just swell
• ''All systems go''
• 'Thumbs up'
• Apollo affirmative
• Ducky
• Comment from a capsule
• Proceeding normally
• Houston approval
• 'Thumbs-up'
• Astronaut affirmative
• Just fine, at NASA
• ''All systems go,'' in letters
• NASA assent
• ''Fine, Houston''