Why? Getting a PADI AOW card by completing 5 specialties (including nav and deep), is a better way to go. Even though the performance standards are not challenging, it still gives a lot more than a single try dive per specialty. If you find instructors who excel at particular specialties, then you might actual have a fair bit of skills improvement. Finding them does take work.Guess it depends if the person has interest in the Rescue Diver class.