I hope you don't mind a long-time ghost reader of this forum sharing some photos of my visit yesterday to the Miraflores locks of the Panama Canal. As someone who loved taking canal holidays when I was younger, before exiling to USA/TX, the visit to the canal was a must-do when in Panama on business.
We visited the Miraflores locks, which are on the pacific side of the canal. They are a two-level staircase lock that raises the ships between 47 to 82 ft (14.33 to 24.99 m) high, depending on the current state of the tide in the Pacific, and then connect on to the single Pedro Migel lock to raise the ships up to the transit level for Lake Gatun. 8-10 hours later they will decend the three-stage Gatun locks into the Caribbean.
Crazy trivia - Although we think of the canal running East-West from Caribbean to Pacific, the "S" shape curves of Panama actually make the canal run almost North-South. Although even crazier, the Caribbean entrance in Colon is actually further west than the Pacific Entrance in Panama City.
First view of the canal as we arrived at the visitor center at Miraflores. We had just missed seeing one ship exit the canal and were hoping there would be another transit to watch come through.
We were in luck - a tug boat and a yacht were just moving from the upper chamber into the lower chamber ready to lower down into the Pacific ocean.
And they were sharing the lock with Fjellanger, a 183m/29,500GRT Norwegian flagged chemical tanker. Also descending in the second set of locks, was the Panamanian containership MSC Pilar (294m/52,000GRT) which was entering the upper chamber from Lake Miraflores after a short transit from the Pedro Migel lock.
Mules (small locomotives) run along the sides of the chambers to keep the ships straight and central in the locks. The ships provide the forward propulsion but the mules are used for positioning and stopping. They seemed to run 2 each side at the front (one fore and one spring) and the same at the stern. The mules have a very steep change in level between the upper/lower chambers.
The canal just celebrated 100 years of operation from 1914 to 2014
The upper gates of each lock/chamber have double gates, spaced 70 feet/21m apart, incase of collision by a ship into the gates. The second gate provides protection from flooding/draining the system .
And as the MSC Pilar moved on down into the final lower chamber of the Miraflores, the container ship MOL Efficiency(294m/53,800GRT) entered the upper chamber to start the process all over again.
And the best part....the viewing center also has a bar/restaurant so all this was watched with an ice cold Balboa in my hand.