If one searches around youtube there is quite a lot of films reels people have uploaded show the devices in action. e.g. This is a fire control mechanism for s

If one searches around youtube there is quite a lot of films reels people have uploaded show the devices in action. e.g. This is a fire control mechanism for ships. https://www.youtube.com/watch?v=s1i-dnAH9Y4 https://www.youtube.com/watch?v=s1i-dnAH9Y4 Very clever stuff indeed.