Deadweight
Deadweight is the difference between the displacement at the summer load line corresponding to the assigned freeboard and the lightship displacement
Source: "R.035-2010. Rules for Inspection of Ships in Operation. Guide"
(approved by Order of the Russian River Register dated 02.07.2010 No. 38-p)
(together with "Instructions for Determining the Technical Condition of Ship Hulls in Operation Using the Calculated Method", "Methodological Guidelines for Determining the Technical Condition of Metallic Hulls", "Methodological Guidelines for Determining the Technical Condition of Machinery", "Methodological Guidelines for Determining the Technical Condition of Electrical Equipment"