Payback of an in-water hull cleaning - days to recover cost via the fuel saved on the resistance reduction.
Formula
$$ \text{Payback} = \frac{\text{Cost}}{\dot F \cdot s \cdot P} $$
Symbol legend
| Symbol | Meaning | Unit | Source |
|---|---|---|---|
| $\dot F$ | Daily fuel before clean | t/day | noon report |
| $s$ | Fuel saving fraction | - | post-clean measurement |
| $P$ | Bunker price | USD/t | bunker index |
Sources
- BIMCO / IMO - In-water hull cleaning guidance.