Cruisers occupy a particularly wide part of the warship spectrum. Ships called frigates, galleons, carracks, cogs, and galleys have all performed cruising work at different times. That history matters because the role can outlast the label attached to any particular class. This functional definition carries through the historical and modern examples that follow.
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Why the cruiser role defies a single definition
Cruisers are defined less by a fixed hull type than by a broad, long-running set of maritime roles.