Sting Ray City with 85 year old FIL

My father-in-law would love to go with us to Sting Ray City, but he wants to know if the water is shallow enough, when interacting with the sting rays, to be able to stand up? How deep is the water? We're thinking the morning slot.

Go ahead, he'll be fine. The water is only up to his waist. It's a great excursion and I really enjoyed it. The guides are good, they feed the stingrays and you can try it yourself. They have names for each one. F-in-L should be able to haul himself up the ladder out of the water and back onto the dock. I would like to think I can still do it when I'm 95.