How do you prepare a ship for dry docking?

How to Prepare the Vessel for Dry-Docking Procedure?

  1. Create a repair and maintenance list and obtain a drydock handbook if required.
  2. Each and every spare part must be checked and repair items should be kept handy – ready for use.
  3. Engine room, tank top, and bilges should be thoroughly cleaned.

What are the stability requirements for dry docking?

Stability of Ships During Dry docking

  • P = upward force excerted by the keel block.
  • M1 = metacentre of waterline W1L1.
  • G = centre of gravity of the water-borne ship.
  • W = displacement of water-borne ship.
  • W-P = water-borne displacement at waterline W1L1.
  • GM1 = virtual metcentric height of the ship at waterline W1L1.

How often should a vessel be dry docked?

five years
The rules state that cargo ships have to be dry docked twice in an interval of five years with the interval between consecutive dry dockings being not less than two years and not more than three years.

What is dry docking plan?

The process of dry-docking refers to when a vessel is taken to the service yard and brought to dry land so that submerged portions of the hull can be cleaned and inspected. This work is both preventative as well as a regulatory requirement within the industry.

What are the components of dry docking?

dry dock, type of dock (q.v.) consisting of a rectangular basin dug into the shore of a body of water and provided with a removable enclosure wall or gate on the side toward the water, used for major repairs and overhaul of vessels.

How do ships balance in dry dock?

Stability during Docking: When the ship enters a dry dock, it must have a positive metacentric height; and is usually trimmed by stern. The floor of the dry dock is lined with keel blocks, which are so arranged such that they can bear the weight of the ship.

How is dry docking done?

In dry docking, a ship is removed from the water to enable work to be performed on the exterior part of the ship below the waterline. Ships are constructed on dry docks. In launching, the new or repaired ship is either floated in place or slid from its berth.

What maintenance is carried out in dry dock?

The main purpose of a Dry Dock is to expose the underwater parts for inspection, repair and maintenance. The ship to be repaired is hence manoeuvred into the lock and the gates are sealed post which all the sea water accumulated in the vessel is drained for better inspection and repairs.

What happens in a dry dock?

A dry dock is exactly what it sounds like: a dock for ships, submarines and any aquatic vehicle, which is emptied of water. It’s used to repair and build with easy access to the hull and underside, while the vessel is suspended off the bottom.