When I was young my father was hired to sail our Friendship sloop for a movie about a curmudgeonly old man and a young boy. I would love to get a copy of this for my father's birthday in May, he is turning 91. Our boat (25+1/2' sloop named 'MarGin') was weighed down with sand bags and a hidden 55 gallon drum filled with water in the cockpit to look like it was sinking. I think the actor was Jack Elam but not sure. Can anyone help me locate this movie?