Locking down

Having gone up 21 locks you have to go back through them all. Final section of the canal is quite energetic with 9 locks in a short distance. It can take time if other boats are coming up. There is another boat in front of us gong down and each lock holds 90,000 gallons of water which has to be let in and let out to lower the boat. No 1 son here is doing his best to have is picture taken.