Air Traffic Control Lights

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Across
  1. 3. Return to starting point on airport (2 words no space)
  2. 5. Taxi clear of runway in use (2 words no space)
  3. 7. (U.S.) Danger. Be on alert. This signal may be used to warn you of such hazards as danger of collision, obstruction, soft field, etc. (4 words no space)
  4. 8. Clear to land(3 words no space)
  5. 10. The firing of this, whether by day or night and notwithstanding any previous instruction means “Do not land for the time being”. (2 words no space)
  6. 11. Vehicles and pedestrians vacate the runway immediately (3 words no space)
  7. 12. Stop. (3 words no space)
Down
  1. 1. Do not land. Continue in circuit. (3 words no space)
  2. 2. Cleared for take-off (2 words no space)
  3. 4. Cleared to taxi (2 words no space)
  4. 6. Airport unsafe, do not land (3 words)
  5. 9. Recall signal. Return for landing (3 words no space)