Hi OP- I just want to stop by and say that I hope your father gets well soon. Six months ago my 78 (now 79) year old father had a subdural hematoma on his brain and when they removed it he had a stroke. It has been an extremely difficult thing for us all to go through but my father is slowly recovering. I have had to be the parent and make his medical decisions...not fun!
Hopefully the doctors will be able to help your father very quickly and he will start healing. I am sure it is very scary for your family.
So you are a swimming ref? My kids are very competitive swimmers and water polo players so I have spent countless hours at pools.