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2. Caisson lock - Wikipedia

   en.wikipedia.org/wiki/Caisson_lock

   The caisson lock is a type of canal lock in which a narrowboat is floated into a sealed watertight box and raised or lowered between two different canal water levels. It was invented in the late 18th century as a solution to the problem posed by the excessive demand for water when conventional locks were used to raise and lower canal boats ...

3. Caisson (engineering) - Wikipedia

   en.wikipedia.org/wiki/Caisson_(engineering)

   Schematic cross section of a pressurized caisson. In geotechnical engineering, a caisson (/ ˈ k eɪ s ən,-s ɒ n /; borrowed from French caisson 'box', from Italian cassone 'large box', an augmentative of cassa) is a watertight retaining structure [1] used, for example, to work on the foundations of a bridge pier, for the construction of a concrete dam, [2] or for the repair of ships.

4. Stuffing box - Wikipedia

   en.wikipedia.org/wiki/Stuffing_box

   The stuffing box prevents water from entering the boat's hull. In many small fiberglass boats, for example, the stuffing box is mounted inboard near the point the shaft exits the hull . The "box" is a cylindrical assembly, typically of bronze, comprising a sleeve threaded on one end to accept adjusting and locking nuts.

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6. Lifeboat (shipboard) - Wikipedia

   en.wikipedia.org/wiki/Lifeboat_(shipboard)

   One copy of life saving signals on waterproof paper. One set of fishing tackle. A food ration with an energy value of at least 10,000 kJ (2,400 Cal) for each person the liferaft is designed to hold, packed in airtight and waterproof packaging. Watertight container with 1.5 litres of fresh water for each person the liferaft is designed to hold.

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   Litter-Robot: $100 off bundles on the best-selling self-cleaning litter box Petco : Buy one get one free on dog treats; buy one get one 50% on litter Pet Smart : 50% off all holiday treats and ...