Both near-term and long-term emission reductions are especially needed in maritime transport due to long lifetime of ships and their engines (symbolized by the mitigation*2 title).
Significant total emission reductions will only come with deployment of technology breakthroughs/transformations, such as hydrogen transport. At the same time investment in maritime Research & Design has been declining in recent years.
Simulations clearly show the great importance of bringing forward the step changes called for by IMERS, as animated below (after about 3 seconds).