Related Clues:
- All right, informally
- Comment from a capsule
- Starter's alert
- "All set to go!"
- Proceeding normally
- Houston approval
- Done preparing
- Word to a marksman
- 'Thumbs-up'
- Word flashed at the beginning of some video games
- Houston assurance
- Astronaut affirmative
- Query before a big event
- Just fine, at NASA
- Fully prepared