Overview
OBQ and ROB determination measures liquid remaining in a tank before loading and after discharge. CARSURIN surveyors measure tank content using ullage, ROB or similar methods before loading begins and after discharge completes, then report the determined quantity for the operation's records.
Request a serviceWhy It Matters
Quantity accuracy
Establish an accurate starting or ending quantity for the transfer.
Reconciliation basis
Support reconciliation between shore and vessel quantity records.
Dispute prevention
Provide an independent figure that reduces the basis for quantity disputes.
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Scope of Services
- 01Ullage measurement
- 02OBQ determination
- 03ROB determination
- 04Temperature & density check
- 05OBQ/ROB report
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FAQ
OBQ is the quantity on board before loading; ROB is the quantity remaining on board after discharge is completed.