Pilot cutters, crew boats, patrol craft, whale-watching boats. Outside CII scope; CO₂ per operating hour is the portable benchmark across work-boat categories.
Formula
$$ \text{CO}2^\text{year} = \sum_j F_j \cdot C{f,j} $$
$$ \text{Intensity} = \frac{\text{CO}2 \cdot 1000}{h\text{op}} $$
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) |
| $Bench (Operating hours / year)$ | operational benchmark | h | operations log |
| $d_\text{op}$ | Operating days | d | operations log |
High-duty pilot cutter operations achieve ~ 20–40 kg CO₂ per operating hour. Battery-electric is viable for routes < 30 nm and proliferates rapidly in pilot and patrol services.
Sources
- IMPA - International Maritime Pilots’ Association.
- IMO MEPC.364(79) - Cf conversion factors.