Maximum weight permitted to be lifted by a lifting appliance. Generally, a load less than the yield or failure load by a safety factor defined by a code, standard or good engineering practice. The SWL of a mooring fitting is greater than or equal to the MBL of the mooring line that contacts the fitting while the SWL of a mooring line itself is defined more conventionally.

Related Terms


(1) chemically speaking, a distinct substance formed by the combination of two or more elements in definite proportions by weight and possessing physical and chemical properties different from those of the combining elements. (2) in petroleum processing, generally connotes fatty oils and similar materials foreign to petroleum added to lubricants to impart special properties.


The weight of a specified artificial contaminant that must be added to the influent to produce a given differential pressure across a filter at specified conditions. Used as an indication of relative service life. Also known as Dirt capacity, Dust capacity


A plan outlining the spaces available for fuel, cargo, ballast, fresh water, etc, with guides on weight and volume for spaces at various drafts and displacements


A device for hoisting and lowering heavy weights, cargo, stores, etc


A device for determining the course and speed over the ground in shallow water consisting of a lead or weight attached to a line. The lead is thrown overboard and allowed to rest on the bottom. The course over ground is indicated by the direction the line tends and the speed by the amount of line paid out in a unit of time.


The volume, mass, or weight of a fluid passing through any conductor per unit of time.


Also called asphalt or tar, bitumen is the brown or black viscous residue from the vacuum distillation of crude petroleum. It also occurs in nature as asphalt 'lakes' and 'tar sands'. It consists of high molecular weight hydrocarbons and minor amounts of sulfur and nitrogen compounds.


A method of analysis whereby the dry weight of contaminant per unit volume of fluid can be measured showing the degree of contamination in terms of milligrams of contaminant per liter of fluid.


The weight of an elementary atom, in relation to the weight of an atom of hydrogen. A hydrogen atom being taken as 1.00g.


A dip needle with a sliding weight that can be moved along one of its arms to balance magnetic force, used to determine the correct position of a heeling magnet.

Related questions

MarineProHelp 2018 - 2022