Signal status display on the
USS ; from top to bottom: "red alert", "yellow alert", "normal", "stand by", "auxiliary" Excelsior
Starfleet vessels and outposts, a series of color-coded alert signals were issued, usually by the ship's computer or internal communications systems.
The Earth Starfleet began without an alert status system (signal) until one was suggested by Lieutenant Malcolm Reed aboard the prototype
Enterprise, an early starship that had a larger crew and a greater need for reaction time during crisis situations.
While planning an escape from their
hostage situation, Sub-commander T'Pol mentioned that the sound of the transporter would alert the guards. ( : " ENT ")
The Andorian Incident
Colored alerts Edit
Red alert (condition red) - critical situation, denoted by flashing red warning lights and audio alarms.
Yellow alert (condition yellow) - elevated alert
Blue alert (condition blue) - environmental, docking/separation, or landing alert
General alerts Edit
alert indicator in normal, yellow alert, and red alert modes Galaxy-class