Interpolate between two capacity-table entries to turn an ullage into a Gross Observed Volume.
Formula
$$ V = V_1 + \frac{u - u_1}{u_2 - u_1} (V_2 - V_1) $$
Symbol legend
| Symbol | Meaning | Unit | Source |
|---|---|---|---|
| $u$ | Observed ullage (space above liquid) | m | UTI or radar gauge |
| $u_1, V_1$ | Lower table entry | m, m³ | capacity table |
| $u_2, V_2$ | Upper table entry | m, m³ | capacity table |
Sources
- ISO 13739 - Bunker quantity determination.
- API MPMS Ch.2.