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Working with Density at 15°C in air:
1) Observed Ullage – apply corrections – get Corrected Ullage
2) Observed Interface – apply corrections – get Corrected Interface
3) From Corrected Ullage, find Total Observed Volume TOV (in cubic metres)
4) From Corrected Interface, find Volume of Water (in cubic metres)
5) TOV – Water = Gross Observed Volume (GOV) of Cargo (in cubic metres)
6) Use Density at 15°C and Observed Temperature (°C) and find Volume Correction Factor (VCF) from Table 54
7) Gross Standard Volume (GSV) = GOV x VCF (cubic metres)
8) Weight Correction Factor (WCF) = Density at 15°C in vacuum – 0.0011 (or the Density at 15°C in air)
9) Weight in Air (Metric Ton) = GSV x WCF(Density at 15°C in air)
10) Weight in Vaccum (Metric Ton) = GSV x Density at 15°C in vacuum

Working with API Gravity at 60°F:
1) Observed Ullage – apply corrections – get Corrected Ullage
2) Observed Interface – apply corrections – get Corrected Interface
3) From Corrected Ullage, find Gross Observed Volume (in US Barrels)
4) From Corrected Interface, find Volume of Water (in US Barrels)
5) GOV – Water = Observed Volume of Cargo (in US Barrels)
6) Use API Gravity at 60°F and Observed Temperature (°F) and find Volume Correction Factor (VCF) from Table 6
7) Gross Standard Volume (GSV) = Observed Cargo Volume (Barrels) x VCF (in US Barrels)
8) Find Weight Correction Factor (WCF) from Table 13
9) Weight in Air (Metric Tons) = GSV x WCF

Working with Relative Density at 60/60°F:
1) Observed Ullage – apply corrections – get Corrected Ullage
2) Observed Interface – apply corrections – get Corrected Interface
3) From Corrected Ullage, find Gross Observed Volume (in cubic metres)
4) From Corrected Interface, find Volume of Water (in cubic metres)
5) GOV – Water = Observed Volume of Cargo (in cubic metres)
6) Use Relative Density at 60/60°F and Observed Temperature (°F) and find Volume Correction Factor (VCF) from Table 24
7) Gross Standard Volume (GSV) = Observed Cargo Volume (m³) x VCF (in m³)
8) Weight in Air (Metric Ton) = GSV x Relative Density at 60/60°F