Entering one of the 46 locks on the Royal Canalletsgetlost (55) in dtube • 7 years ago (edited) There are 46 locks from the Shannon to Dublin. They are all manually operated. This means we open them with a ratched, which is a key the size and weight of a mallet. It's fun, care needs to be taken, and it keeps us fit. dtube dtube-travel dtube-waterways dtube-boats dtube-ireland