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A civil flag is a version of the national flag that is flown by civilians on nongovernmental installations or craft. The use of civil flags was more common in the past to denote buildings or ships not manned by the military.
In Scandinavia, state and war flags can be double and triple-tailed variants of the Nordic Cross flag. Many countries, particularly those with a British heritage, still have distinctive civil flags (technically civil ensigns) for use at sea, many based on the Red Ensign.