by GuestfromEU » February 4, 2023, 10:37 am
There is a drawing called the Docking Plan which shows the location of longitudinal stiffeners and transverse web frames. When a ship is set on the blocks in dry dock the shipyard uses this drawing to place the blocks prior to flooding the dock and bringing in the ship. During normal docking surveys, the blocks are spotted in different locations than previous dockings so coatings can be applied in the areas that were previously obscured by blocks. Divers are often used to spot the ship as it enters the dock. Blocks are usually set within one working day - the bow and stern areas take a bit more time due to curvature of the hull, but the midbody section is repetitive - same spacing on X and Y axis.
During damage repairs, the location of plates and frames that are set in and will be cropped and renewed are identified on the docking plan and blocks are avoided in these areas. If the damaged area is large, blocks will be placed in damaged areas for support, then repositioned out of the way as repairs progress. Often the construction plans will state the number of blocks to be placed in a specified area of the hull. Example, the machinery spaces require additional blocks due to weight of the engine and machinery, possible fuel in bunker tanks, etc.
There is a drawing called the Docking Plan which shows the location of longitudinal stiffeners and transverse web frames. When a ship is set on the blocks in dry dock the shipyard uses this drawing to place the blocks prior to flooding the dock and bringing in the ship. During normal docking surveys, the blocks are spotted in different locations than previous dockings so coatings can be applied in the areas that were previously obscured by blocks. Divers are often used to spot the ship as it enters the dock. Blocks are usually set within one working day - the bow and stern areas take a bit more time due to curvature of the hull, but the midbody section is repetitive - same spacing on X and Y axis.
During damage repairs, the location of plates and frames that are set in and will be cropped and renewed are identified on the docking plan and blocks are avoided in these areas. If the damaged area is large, blocks will be placed in damaged areas for support, then repositioned out of the way as repairs progress. Often the construction plans will state the number of blocks to be placed in a specified area of the hull. Example, the machinery spaces require additional blocks due to weight of the engine and machinery, possible fuel in bunker tanks, etc.