MADEY GO DOCKING.
Assalamualaikum and hi, so before aku start #madeygodockingseries better aku kenalkan diri sikit.
Muhamad Mahathir bin Mohd Fadzil and currently sail with ICONOFFSHORE.
Alhamdulilah so far aku baru experience 2 kapal OSV docking -
- Icon Samudera @ Grade One Marine Shipyard (GOMS), Lumut
- Icon Lotus @ Malaysia Marine and Heavy Engineering (MMHE), P.Gudang.
AHTS ICON SAMUDERA
AHTS ICON LOTUS
GRADE ONE MARINE SHIPYARD , LUMUT
MMHE , P.GUDANG
Definition ?
A dock is an enclosed area of water used for loading, unloading, building or repairing ships. Such a dock may be created by building enclosing harbour walls into an existing natural water space, or by excavation within what would otherwise be dry land.
There are specific types of dock structures where the water level is controlled:
- A wet dock or impounded dock is a variant in which the water is impounded either by dock gates or by a lock, thus allowing ships to remain afloat at low tide in places with high tidal ranges. The level of water in the dock is maintained despite the rising and falling of the tide. This makes transfer of cargo easier. It works like a lock which controls the water level and allows passage of ships. The world's first enclosed wet dock with lock gates to maintain a constant water level irrespective of tidal conditions was the Howland Great Dock on the River Thames, built in 1703. The dock was merely a haven surrounded by trees, with no unloading facilities. The world's first commercial enclosed wet dock, with quays and unloading warehouses, was the Old Dock at Liverpool, built in 1715 and held up to 100 ships. The dock reduced ship waiting giving quick turn arounds, greatly improving the throughput of cargo.
- A drydock is another variant, also with dock gates, which can be emptied of water to allow investigation and maintenance of the underwater parts of ships.
- A floating dry dock (sometimes just floating dock) is a submersible structure which lifts ships out of the water to allow dry docking where no land-based facilities are available.
Where the water level is not controlled berths may be:
- Floating, where there is always sufficient water to float the ship.
- NAABSA (Not Always Afloat But Safely Aground) where ships settle on the bottom at low tide. Ships using NAABSA facilities have to be designed for them.
A dockyard (or shipyard) consists of one or more docks, usually with other structures.
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Why docking?
From time to time, it becomes important to carry out repairs in the underwater portion of the hull. Such repairs may include renewal of the sacrificial anodes, refit of the propellers, overhauling of the propulsion shafts, repair of rudders, underwater hull blasting to remove fouling, etc. In order to carry out these repairs, the underwater portion of the hull needs to be made accessible, which is the purpose served by a dry dock. It has also become a common practice in large shipyards to build their ships on dry docks, and float it out when ready for trials. For such procedures, the docking plans need to be prepared taking into consideration the increase in weight of the ship structure along the building time. Once the ship has been built, the dry dock is flooded and the ship is undocked. The calculations for undocking also play a major role in the process because it is during undocking that the the ship is at a risk of capsizing
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