The objective of these guidelines is to provide the users
with guidance on achieving the targets set by IMO resolution A.963(23). The guidelines provide
assistance in the process of establishing a mechanism to achieve the
limitation or reduction of greenhouse gas emissions from shipping.
This guideline presents the concept of an index for the energy
efficiency of a ship in operation, limited to an expression of efficiency
expressed in way of CO2 emitted per unit of transport work.
The guidelines are intended as an objective, performance-based document
for guidance on monitoring of the efficiency of ship operation.
These guidelines are recommendatory in nature and present a
possible application of an index. However, shipowners are invited
to implement these guidelines in their environmental management systems
and adopt the principles herein for performance monitoring.