This flag can indicate a state of war if it is displayed with the red side on top.

Another solution is to keep a flag indicating whether the most recent operation was a read or a write.

"To me it was a red flag indicating a possible connection," he said.

This flag indicates the legal jurisdiction to which it is subject.

A black flag with white border, indicating that a rider must leave the course.

These flags indicate that a commanding or leadership officer is on board.

It will also set a flag indicating that an input has been captured.

The biggest ship and the flag without the streamer indicate high water.

The flag indicates the actual position of the vehicle within the cloud which can be important for safety reasons.

In auto racing, a red flag indicates a stop to the race due to dangerous conditions.