Submarine-cable installation vessels. Outside CII scope; per-km-cable-laid intensity serves as the industry benchmark.
Formula
$$ \text{CO}2^\text{year} = \sum_j F_j \cdot C{f,j} $$
$$ \text{Intensity} = \frac{\text{CO}2^\text{year}}{L\text{cable}} $$
Symbol legend
| Symbol | Meaning | Unit | Source |
|---|---|---|---|
| $F_j$ | Mass of fuel $j$ | t | bunker log |
| $C_{f,j}$ | CO₂ factor | t CO₂ / t fuel | MEPC.364(79) |
| $Bench (Cable laid / year)$ | operational benchmark | km | operations log |
| $d_\text{op}$ | Operating days | d | operations log |
Hybrid power plants and shore-power at mobilisation port are common CII-equivalent levers. Typical cable layer: 2–4 t CO₂ per km laid.
Sources
- SubCom - Installation environmental report.
- IMO MEPC.364(79) - Cf conversion factors.