Thank you for reading my post.
My stepfather's brother was 91 and wanted to go fishing, we wheeled him to the edge of the creek and put a pole in his hand, he only caught catfish but enjoyed it anyway.

If you could have seen the look on his face maybe you would consider taking your father fishing, if you can't take him to the pier, maybe you could take him to a boat ramp or some other place where he can sit and fish.

That is if it is something he would like to do.