Question What does the expression "equal positive control" mean?

Dear @Brian R. Peterson I was really impressed by your very sophisticated explanation of the Titanic's telemotor. There is one expression, though, that puzzles me a bit as I couldn't find an appropriate translation in a German dictionary. The expression "equal positive control" seems to be very simple, but I might have got a wrong idea about this term. I'd appreciate it if you could rephrase or simplify the function as stated above. Thank you very much and all the best to you! Kindest regards, Herbert Strobel, Falkenstr. 5, 72459 Albstadt (Germany)
related to an answer for: What does the bridge telemotor do?