Posted By Surveyors on Feb 3, 2016 |

**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 (m^{3}) x VCF (in m^{3})

8) Weight in Air (Metric Ton) = GSV x Relative Density at 60/60°F

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