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Beam – A measure of the width of the ship. There are two types: Beam, Overall (BOA), commonly referred to simply as Beam – The overall width of the ship measured at the widest point of the nominal waterline. Beam on Centerline (BOC) – Used for multihull vessels. The BOC for vessels is measured as follows: For a catamaran: the ...
Graphical representation of the dimensions used to describe a ship. Dimension "b" is the beam at waterline.. The beam of a ship is its width at its widest point. The maximum beam (B MAX) is the distance between planes passing through the outer sides of the ship, beam of the hull (B H) only includes permanently fixed parts of the hull, and beam at waterline (B WL) is the maximum width where the ...
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. [1] 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 ...
In seafaring, under keel clearance (UKC) is the height between seabed and the keel or hull of a ship. [ 1 ] [ 2 ] [ 3 ] It is used to ensure sufficient navigable water is available for ships at sea. [ 4 ] [ 5 ] [ 1 ] [ 6 ] It is most commonly defied as Master mariners should ensure there is sufficient minimum UKC for their ships ; ports should ...
The process of determining a vessel's displacement begins with measuring its draft. [3] This is accomplished by means of its "draft marks". A merchant vessel has three matching sets: one mark each on the port and starboard sides forward, midships, and astern. [3] These marks allow a ship's displacement to be determined to an accuracy of 0.5%. [3]
abaft the beam Farther aft than the beam; a relative bearing of greater than 90 degrees from the bow; e.g. "two points abaft the beam, starboard side" would describe "an object lying 22.5 degrees toward the rear of the ship, as measured clockwise from a perpendicular line from the right side, center, of the ship, toward the horizon". [4 ...
Beam Draft Example Ultra Large Container Vessel (ULCV) 14,501 and higher 1,200 ft (366 m) and longer 160.7 ft (49 m) and wider 49.9 ft (15.2 m) and deeper With a length of 400 m, a beam of 59 m, draft of 14.5 m, and a capacity of 18,270 TEU, ships of the Maersk Triple E class are able to transit the Suez canal. [35]
The vessel's clearance is the distance in excess of the air draft which allows a vessel to pass safely under a bridge or obstacle such as power lines, etc.A bridge's "clearance below" is most often noted on charts as measured from the surface of the water to the underside of the bridge at the chart datum Mean High Water (MHW), [3] [4] a less restrictive clearance than Mean Higher High Water ...