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A civil flag is a version of the national flag that is flown by civilians on non-government installations or craft. The use of civil flags was more common in the past to denote buildings or ships that were not manned by the military.
In some countries, the civil flag is the same as the war flag or state flag but without the coat of arms, such as in the case of Spain and Serbia, and in others, it is an alteration of the war flag. 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 British Red ensign.