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Hub AI
Draft (hull) AI simulator
(@Draft (hull)_simulator)
Hub AI
Draft (hull) AI simulator
(@Draft (hull)_simulator)
Draft (hull)
The draft or draught of a ship is a determined depth of the vessel below the waterline, measured vertically to its hull's lowest—its propellers, or keel, or other reference point. Draft varies according to the loaded condition of the ship. A deeper draft means the ship will have greater vertical depth below the waterline. Draft is used in under keel clearance calculations, where the draft is calculated with the available depth of water (from Electronic navigational charts) to ensure the ship can navigate safely, without grounding. Navigators can determine their draught by calculation or by visual observation (of the ship's painted load lines).
A ship's draft/draught is the "depth of the vessel below the waterline measured vertically to the lowest part of the hull, propellers, or other reference point". That is, the draft or draught is the maximum depth of any part of the vessel, including appendages such as rudders, propellers and drop keels if deployed.[citation needed] The related term air draft is the maximum height of any part of the vessel above the water.[citation needed]
Draft determines the minimum depth of water a ship or boat can safely navigate in relation to the under keel clearance available. The more heavily a vessel is loaded, the deeper it sinks into the water, and the greater its draft (also referred to as its displacement). After construction, the shipyard creates a table showing how much water the vessel displaces based on its draft and the density of the water (salt or fresh).[citation needed] The draft can also be used to determine the weight of cargo on board by calculating the total displacement of water, accounting for the content of the ship's bunkers, and using Archimedes' principle.[citation needed]
The difference between the forward and aft drafts of a ship is termed its trim.
In commercial ship operations, the ship will usually quote the mean draft as the vessel's draft.[citation needed] However, in navigational situations, the maximum draft, usually the aft draft, will be known on the bridge and will be shared with the pilot.[citation needed]
The draft of a ship can be affected by multiple factors, besides the variations caused by changes in displacement:
When measured to the lowest projecting portion of the vessel, it is called the "draft, extreme"; when measured at the bow, it is called "draft, forward"; and when measured at the stern, the "draft, aft"; the average of the draft, forward, and the draft, aft is the "draft, mean", and the mean draft when in full load condition is the "draft load".
These are markings and numbers located on both sides of a vessel, as close as possible to the bow and stern, and then also, often amidships. The number and its associated marking indicate the distance from the marking to the bottom lowest fixed reference point of the vessel (e.g., its keel). The numbers and markings were large and clear; for instance, on U.S. naval vessels, the numbers were, historically, as a standard, 6 inches tall, with spacing of 12 inches bottom to bottom, vertically.
Draft (hull)
The draft or draught of a ship is a determined depth of the vessel below the waterline, measured vertically to its hull's lowest—its propellers, or keel, or other reference point. Draft varies according to the loaded condition of the ship. A deeper draft means the ship will have greater vertical depth below the waterline. Draft is used in under keel clearance calculations, where the draft is calculated with the available depth of water (from Electronic navigational charts) to ensure the ship can navigate safely, without grounding. Navigators can determine their draught by calculation or by visual observation (of the ship's painted load lines).
A ship's draft/draught is the "depth of the vessel below the waterline measured vertically to the lowest part of the hull, propellers, or other reference point". That is, the draft or draught is the maximum depth of any part of the vessel, including appendages such as rudders, propellers and drop keels if deployed.[citation needed] The related term air draft is the maximum height of any part of the vessel above the water.[citation needed]
Draft determines the minimum depth of water a ship or boat can safely navigate in relation to the under keel clearance available. The more heavily a vessel is loaded, the deeper it sinks into the water, and the greater its draft (also referred to as its displacement). After construction, the shipyard creates a table showing how much water the vessel displaces based on its draft and the density of the water (salt or fresh).[citation needed] The draft can also be used to determine the weight of cargo on board by calculating the total displacement of water, accounting for the content of the ship's bunkers, and using Archimedes' principle.[citation needed]
The difference between the forward and aft drafts of a ship is termed its trim.
In commercial ship operations, the ship will usually quote the mean draft as the vessel's draft.[citation needed] However, in navigational situations, the maximum draft, usually the aft draft, will be known on the bridge and will be shared with the pilot.[citation needed]
The draft of a ship can be affected by multiple factors, besides the variations caused by changes in displacement:
When measured to the lowest projecting portion of the vessel, it is called the "draft, extreme"; when measured at the bow, it is called "draft, forward"; and when measured at the stern, the "draft, aft"; the average of the draft, forward, and the draft, aft is the "draft, mean", and the mean draft when in full load condition is the "draft load".
These are markings and numbers located on both sides of a vessel, as close as possible to the bow and stern, and then also, often amidships. The number and its associated marking indicate the distance from the marking to the bottom lowest fixed reference point of the vessel (e.g., its keel). The numbers and markings were large and clear; for instance, on U.S. naval vessels, the numbers were, historically, as a standard, 6 inches tall, with spacing of 12 inches bottom to bottom, vertically.
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