Emergency lighting, oxygen and smoke detectors are the same on all 3 aircrafts.
1. Emergency lighting, oxygen, and smoke detectors are identical on all 3 aircraft models.
2. Emergency lighting, oxygen, and smoke detectors are consistent across all 3 aircraft types.
3. Emergency lighting, oxygen, and smoke detectors are unchanged on all 3 aircrafts.
4. Emergency lighting, oxygen, and smoke detectors are uniform across all 3 aircrafts.