Naval vessels have a set of key requirements that must be maintained to ensure operational capability. Whilst we design vessels for war, the reality is that many are used for various other roles and rarely see combat. How do we ensure navies can play their part in reducing emissions without impacting on capability in times of conflict? Utilising dual fuel arrangements provides the opportunity to reduce emissions during peace time operations in the near term. It also provides an increase in survivability during combat whilst ensuring fuel availability has a reduced impact on the vessel. This paper will explore the work conducted to integrate dual fuel methanol on the BMT concept Ellida vessel, an amphibious transport craft. The integration of dual fuel methanol can also be a route to support decarbonisation across the existing fleet with retro-fit of the technology. Which is also highlighted within the paper.