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#lock

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Public *
Bobbing Boat

On the UK's canals, locks allow boats to go uphill or downhill, in stepped chambers that raise or lower the water, so the boat can move on. As a lock chamber fills, every meter of water weighs about 40,000 kilos. The lock's gates must hold in that water.

An average 6½-foot gate weighs 950 kilos, or 2,000 pounds. Each one is handmade of solid wood, reinforced with steel plates, straps, and bolts.

The image ALT text tells more.

Close-up of the inside of a lock gate when the lock is drained. For scale, there's a person's hand. A thick, flat, steel, T-shaped plate of about 50cm or 18 inches tall is bolted into several wood beams. The plate and other steel strapping like it hold the beams together tightly, so no water leaks through. The wood, probably oak, is textured from wear and age, and covered in bits of vegetation, algae, and … let's call it gunk. When new, the wood would have been smooth. Like all gates, this one has a cast-iron label (not shown) that says when it was made: 2003. The following is extra information that's not shown in the photo. A lock gate has a long arm, a massive oak beam, usually 30×30 centimetres and 3 meters long, which sticks out from the gate over land. This beam is the lever that boaters push to open and close the gate. If the gate is well balanced, it's a slow but relatively easy task, given that you're moving a tonne of oak and steel strapping. If it's not well balanced, you ask passers-by to help, which they almost always will. A lock gate can last two decades or more, particularly when well maintained, when leaks are fixed so water and freezing doesn't erode cracks further, and when boaters don't crash their multi-tonne steel boats into the gate.
#CanalLife#canal#lock
Public *
Bobbing Boat

Uphill, #boating alone:
1. Approach the #lock, tie up the boat.
2. Drain the lock: open lower paddles.
3. Once empty: close lower #paddles.
4. Open the lower gate.
5. Untie the #boat, enter the lock.
6. Climb the ladder, bring the #midline.
7. Close the lower #gate.
8. Fill the lock: open upper paddles.
9. Use the midline to control the boat.
10. Once full: close the upper paddles.
11. Open the top gate.
12. Exit the lock and tie up.
13. Close the top gate.
14. Untie the boat and keep #boating.

A steel ladder inset into the side of a drained lock chamber. The top two steps and grab handles are painted white. Below the waterline (when the lock is filled with water), the lower rungs are black. The stones are hand hewn: they differ in width and some rows doffer in height (thickness). There are a few green plants growing on the wall.
Public
Bobbing Boat

When there's a flight of locks, sometimes you end up waiting in one lock for a boat that's coming from the next lock. Both crews leave the lock gate open so we can pass each other between locks and directly enter the next lock.

Today, the draining water from the lock above was overfilling the pound and lock I was waiting in. Just look at the water level … nearly overflowing.

A narrowboat floating in a broadbeam canal lock. The view is from the stern over the roof. It shows the lock is full, its upper gate is already open, and the lock and pound above are very full of water. There are trees, grass, and parts of the lock (ladder, bollards) in the frame.
#CanalLife#canal#boat
Public
C.

@lauren

I'm wondering if you have any #thoughts on the "#Web #Environment #Integrity" proposal by some #Google folks. I wrote a short thread about it, but would be interested in hearing your thoughts before reading it (if you do read it - I'm not demanding it 😀 ).

mindly.social/@cazabon/1107500

Re: it's essentially a proposal to #lock #down #browsers so they can't do things the web #publishers don't want - think #adblockers, #extensions that modify content, etc.
github.com/RupertBenWiser/Web-

Mindly.SocialC. (@cazabon@mindly.social)Google's "Web Environment #Integrity" #proposal is one of the #evilest things I have ever seen proposed for the #internet, possibly only behind #government #IDs being required for any access. https://github.com/RupertBenWiser/Web-Environment-Integrity/blob/main/explainer.md Let's get this out of the way: they give a number of #reasons why #webservers "might wish" to establish that a web #client is running on a "#trusted" software stack, including things like "make sure other game players aren't cheating" and "ensure I'm talking to another human". 1/x
#BadIdea
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