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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.
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.
A liftboat is a self-propelled, self-elevating vessel used in support of various offshore mineral exploration and production or offshore construction activities. A liftboat has a relatively large open deck to accommodate equipment and supplies, and the capability of raising its hull clear of the water on its own legs so as to provide a stable ...
Geheyan dam boat lift, also in Hubei Province, capable of lifting vessels of 300 tons displacement. The dam was completed in 1994, but technical difficulties delayed the opening of the ship lift for four more years. Longtan dam boat lift, capacity to lift vessels of 250 tons, in a basin 40×10.8×1.8 meters, and a vertical lift of 68.5 meters. [2]
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] It is 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]
A boat lift, ship lift, or lift lock is a machine for transporting boats between water at two different elevations, and is an alternative to the canal lock. It may be vertically moving, like the Anderton boat lift in England , rotational, like the Falkirk Wheel in Scotland , or operate on an inclined plane , like the Ronquières inclined plane ...
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