Three steps from left to right. First a five-bar readability meter climbs from 1, unreadable, through 2, readable now and then, and 3, readable with difficulty, where a tag says ask again, to 4, readable, and 5, perfectly readable. Next two cards appear: PAN PAN, urgency, and MAYDAY, distress, each pulsing three times because the word is said three times. Last, four boxes appear for what an emergency call should say: who, where, what and need.
