Type S4 ship may refer to:
*
Casablanca-class escort carrier
The ''Casablanca''-class escort carrier were a series of escort carriers constructed for the United States Navy during World War II. They are the most numerous class of aircraft carriers ever built. Fifty were laid down, launched and commissione ...
a S4-S2-BB3 ship.
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Gilliam-class attack transport a S4-SE2-BD1 ship.
*
Artemis-class attack cargo ship a S4-SE2-BE1 ship.
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