Back!
Near disaster today. The locks I work on are very big and are controlled hydraulically. They also have traffic lights!
Today I had five very large (sea-going) fibre glass cruisers (c. £150000 each) in the lock. I had set a red light for a large steel Dutch Barge approaching from the other direction. The deaf, blind and senile clown in the barge IGNORED the red light and attempted to enter the lock as the 5 cruisers were coming out
People in the lock were actually screaming.
I told them all to stop and told him to reverse. They went off and I had a VERY LONG AND STERN CONVERSATION with barge man