Minimum distance from land and rate/speed limits for sewage discharge per MARPOL Annex IV.
Formula
$$ \text{Distance} = {12 \text{ nm (raw)}, ; 3 \text{ nm (comminuted)}, ; 0 \text{ (STP)}} $$
Symbol legend
| Symbol | Meaning | Unit | Source |
|---|---|---|---|
| $Treatment$ | Raw / comminuted / type-approved STP | - | installation |
| $Speed$ | Under-way ship speed | kn | log |
Sources
- MARPOL Annex IV Reg 11.
- MEPC.227(64) - STP performance standards.