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A flashing yellow signal light means proceed with caution.
A flashing yellow arrow signal means you can turn left, but you must yield to oncoming traffic and pedestrians.
You must stop
Nine white flashing lights in boating typically indicate a distress signal or an emergency situation. This signal is often used to attract attention, as it is not a common navigational light pattern. If observed, nearby vessels should be alert and ready to assist. It's important to follow proper protocols and communicate with maritime authorities if you encounter such a signal.
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In aviation, flashing red means get of the runway if you are on the ground and it means the airport is not safe for landing if you are in the air.
In the U.S.A it means you have the right of way but proceed with caution.
General Warning: Exercise extreme precautions
The white flag is traditionally considered a signal of surrender.
A red light - steady or flashing - means STOP. A steady amber light means Caution - signal about to change. A flashing amber light means SLOW DOWN.
Flashing headlights can mean different things, often signaling a warning about a potential hazard or alerting you to a problem with your vehicle. It can also be a signal for you to dim your high beams if they are too bright. In some cases, law enforcement officers may use flashing headlights as a signal to pull over for a traffic stop.