Warning!....Look!... Heads Up! ...Incoming!
beams
beams
Flash high beams. Sound the horn.
The distant signal is the "early warning" indicator for the home signal, it's used to give an early indication to the driver of what to expect when he arives at the home signal.
Alert, alarm
To inform other drivers of your intent to turn. Or when used in unison as a warning that the vehicle is in trouble or stopped or broken down on the side of a carriageway. Improved answer: To switch 'on' the signal light
She is warning them and the rest of the herd that you are there it is a warning signal. They always do this when they feel a threat to the herd (warren). It is especially used when a predator is in the area.
If you are asking about what was the distress signal the Titanic wireless operators used, it was "CQD" ("All stations: distress").
Train horns are used as a warning sign. Each different type of warning requires a different sequence of sound by the horn. The train horn can be used to signal things such as an upcoming intersection, upcoming train station, initiation of movement, change of direction, and warn pedestrians of the train's presence.
When armies would fight for China they used the wall for signal fires which provided early warning of an attack. That's all I got!
Of course The letters that they give you are the most common to be used. Then you choose your own
The warning track is commonly used in baseball to describe the area nearest the fence to give players warning of the fence that is approaching. It is usually opposite the area before it ex. the outfield is grass meaning the warning track is dirt/gravel etc.