Draft Survey

DRAFT SURVEY

• Draft Surveys are to determine the quantity of cargo loaded in, or discharged from a vessel or barge and are dependent on the fact that the vessel or barge is always afloat, and that all the drafts are visible. Some of the common problems during draft surveys should always be aware of are: • • Unusable sounding pipe - i.e., inaccessible, blocked or broken.
• Ballast holds, which are poorly calibrated.
• Tunnel space/duct keel that cannot be sounded.
• Loaded vessel aground prior to commencement of discharge.
• Loaded vessel aground after completion of loading prior to sailing.
• Listed vessel, which has its effect on displacement and soundings of liquids in tanks and other spaces.
• Weights other than the cargo, ballast, or consumables that are not the same between the starting and to the finishing surveys.