Diane, my dad is older than yours (80) and has some really bad episodes like you describe. He'll be convinced he is on a ship or a submarine, he did build submarines during WWII, and he has been on ships many times, so he has a good frame of reference. Sometimes he is just using the wrong word to describe what he needs or wants. A long time ago he was refeing to the air conditioning vents in the kitchen. I was thinking he was talking nonsense, but he was on target. If the kitchen vents are open too far, their is too little cool air in the room he spends the most time in, and he gets too hot. By the way, we got him a pair of floor fans, that we aim towards him, and set on low speed and he is comfortable. Before they would set the air cond. low and mom would freeze, and he was still too hot. I believe from what I have read here, that the halucinations can be almost 100% controlled with proper medication, given at the right times. I will leave the details to the Neurologists, and you. Ken B