The crossword solutions for the term JFK GUESSES are ETAS and ETDS. ETAS stands for Estimated Time of Arrival, which is a prediction of when a vehicle or person will arrive at a certain destination. ETDS stands for Estimated Time of Departure, which is a prediction of when a vehicle or person will leave a certain destination. Both terms are commonly used in the aviation industry and were popularized by John F. Kennedy International Airport in New York City.