Planes, like the ones that do commercial passenger and cargo flights, are much harder to go fully electric compared to ships. Ships, unlike planes, don’t need to maintain a minimum speed and are less constrained by battery weight. Recharging their batteries would take a long time, depending on their size.
Also, you can make nuclear powered ships, though the operating costs are very high and thus unsuitable for most civilian needs.
Planes, like the ones that do commercial passenger and cargo flights, are much harder to go fully electric compared to ships. Ships, unlike planes, don’t need to maintain a minimum speed and are less constrained by battery weight. Recharging their batteries would take a long time, depending on their size.
Also, you can make nuclear powered ships, though the operating costs are very high and thus unsuitable for most civilian needs.
There are some interesting proposals for electric ships using containerized batteries which can be loaded/unloaded with the same cranes they use for shipping containers and charged in port. https://cleantechnica.com/2025/05/24/beyond-the-harbor-electrifying-short-sea-routes-and-hybridizing-blue-water-shipping/
It may not be suitable for transoceanic trips but a lot of shipping follows the coasts or even travels by river where this may be more practical.