How sad! I am sorry your Dad is having such a time. I hope he will improve with some of the medicines they are working on now.
What a fine looking Sailor your Dad was. Is the uniform a Chief's uniform? I can't make out the insignia on his rating badge. Looks like a Machinist Mate.....but the M & D on either side of the Ship's Screw/Propeller on the badge is different than the ones I saw when I was in the Navy.
Do you remember what his rating was?
All the very best to you and all your Family.