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2. 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.

3. 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.

4. Diving equipment - Wikipedia

   en.wikipedia.org/wiki/Diving_equipment

   Dry box to hold objects the diver needs to keep dry at depth (wallet, cell phone) [clarification needed] Dry bag to carry items that must stay dry on the boat. Dive bag to hold personal dive equipment for travel. Soft bags are traditional for local use, when the dive gear may be wet when packed after use.

5. Lifeboat (shipboard) - Wikipedia

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

   One first aid kit in a resealable waterproof container. One whistle or equivalent sound signal. Four red rocket parachute flares. Six red hand flares. Two buoyant orange smoke signals. One electric torch suitable for Morse signalling with spare batteries and bulb (in a waterproof container). One radar reflector; One daylight signalling mirror.

6. Dorade box - Wikipedia

   en.wikipedia.org/wiki/Dorade_box

   The grey area indicates the deck of the boat. A dorade box (also called a dorade vent, collector box, cowl vent, or simply a "ventilator") is a type of vent that permits the passage of air in and out of the cabin or engine room of a boat while keeping rain, spray, and sea wash out.

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