The Paris Agreement forced the International Maritime Organisation (IMO) to create fresh paradigm for the maritime industry to achieve net zero carbon emissions by 2050. In doing so, IMO exempted warships from complying with these emission norms. However, advanced navies promulgated several initiatives to contribute progressively towards net-zero emission. While the ‘Climate Change and Sustainability Strategic Approach’ of the UK Ministry of Defence (MoD) and the ‘Green Fleet Navy’ of the US are well known, efforts such as the joint venture of the Indian Navy with the Indian Oil Company to develop a fuel recipe by varying over 22 parameters to reduce GHG emissions from warships cannot be disregarded. In recent years, the EU initiative of ‘Adaptation of Industry 4.0 Model to the Naval Sector’ has aimed to reduce carbon emissions in the naval sector using automated technologies of Industry 4.0 by creating new techniques to monitor, control and manage emissions from the ships, repair yards, shipbuilding yards and mercantile marine. It is expected that by carefully curating and cataloguing the emissions from naval assets, both movable and immovable, positive changes towards emission control from the naval sector can be achieved. The article thus aims to discuss Industry 4.0 to provide a better trajectory towards net zero carbon emission from the maritime domain in general and the naval sector in particular.