Aboard Starfleet vessels and outposts, a series of color-coded, and also generally named, alert signals were issued, usually by the ship's computer or internal communications systems.

Colored alerts Edit

• Red alert (condition red) - critical situation - Marked by flashing red warning lights and audio alarms.
  • Double red alert
• Yellow alert (condition yellow) - elevated alert
• Blue alert (condition blue) - environmental, docking/separation or landing alert
• Gray mode

General alerts Edit

• Battle alert
• Battle stations
• "Brace for impact"
• Evacuation alert
• Fire alert
• General quarters
• Intruder alert
• Proximity alert
• Security alert
• Standby alert
• Tactical alert