In the maritime industry, the vessel carbon intensity indicator (AER / CII) is often perceived as a final annual assessment. In reality, however, this rating is not formed at year-end - it is built voyage by voyage, through every commercial decision made by the fleet.
This is why, in Marine Solver, environmental metrics are embedded not only in reporting but directly into scenario planning itself. Each voyage is a small decision that contributes to the overall annual result.
From Compliance to Control
When vessel parameters are uploaded, the system calculates individual rating boundaries for each vessel, since these depend on its technical characteristics. For each scenario, the system automatically calculates the projected carbon intensity indicator and displays it alongside financial and operational metrics.
When stricter requirements apply, users may define a target vessel rating as a model constraint before optimization begins. In such cases, the system generates only those transportation scenarios that fall within the defined environmental range.
Managing Fleet Performance Dynamically
Importantly, constraints are applied based on the individual rating boundaries of each vessel, even when optimization is performed simultaneously across multiple vessels. This allows regulatory requirements for each vessel to be respected while still achieving the best possible aggregated fleet performance.
Real market conditions do not always allow fleets to maintain maximum environmental ratings for every individual voyage. However, systematic scenario planning makes it possible to manage this indicator dynamically - balancing decisions across varying market conditions and maintaining stable environmental performance across the planning horizon.
Embedded Optimization
Environmental calculations in Marine Solver are based on IMO methodologies. It is also important to recognize that the improvement of environmental performance is inherently embedded in the nature of system-level voyage optimization.
Most efficient commercial decisions - constructing rational voyage chains, minimizing ballast legs, and achieving more balanced cargo distribution - simultaneously improve operational efficiency and naturally contribute to improved environmental performance.
The Next Level of Planning
Active environmental rating management represents the next level of planning. When market conditions require selecting commercially stronger options that temporarily reduce environmental performance, subsequent scenario planning allows this effect to be compensated through improved routing and cargo allocation during later fleet operations.
As a result, environmental rating ceases to be a static regulatory metric and becomes a dynamic management parameter that can be balanced within a company’s broader business strategy.