The present appeal of electric ships is not, of course, new. They have been around for many years; famous examples include the French Transatlantic passenger liner Normandie of 1935, also numerous T2 tankers and submarines of the Second World War and afterwards. Over the second half of the 20th century, a sprinkling of trawlers, tugs, ferries, and special-purpose vessels such as cablelayers and icebreakers have also featured this machinery, all generally using diesel-altemators as their prime electric current generators (although Normandie and the T2 tankers celebrated the steam turbo-electric concept).
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