Before reading this post, it is suggested to read the previous post – Petroleum Calculation Series: Definition – to become familiar with abbreviation and terms.
The shipboard loading survey is conduted to get the quantity loaded onboard the vessel with measurement of cargo tank. The sounding or ullaging are performed to obtain the level of oil and free water on each tank. The obtained oil level data were calculated by using ship tank table to get TOV and total free water.
Data required for Crude Oil Survey:
- Tank Number
- Tank Reference Height
- Dip innage (sounding) or ullage
- Free water dip (FW)
- Oil temperature (C or F)
- Oil density or API
- BS&W volume in % (as per analysis result)
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