Locks allow canals to go up and over hills. They can be single locks or ‘flights’ which can be anything between 3 or 30 locks in one go!  A lock is a chamber that the boat sails into and water is let in or let out depending on whether you are travelling up or down, and then you sail out of the other end.
Don’t worry if at first the idea of a lock is a little daunting.   The Black Prince team at your chosen base will cover locks as part of the handover, and you’ll generally find either lock-keepers or other holiday makers more than eager to lend a hand should you need it.  Once you’ve done your first few, you’ll find you have a good process in place with your team and working the locks becomes enjoyable!