Definition
A switch fitted with a hinged cover or shield that must be lifted before the switch can be moved, designed to prevent accidental or inadvertent operation of a critical system.
Plain English
A switch with a small flip-up cover over it. You have to lift the cover before you can flip the switch, so you can't bump it on by mistake.
Context Anchor
Seen on cockpit panels for switches that control important systems, especially where an accidental switch movement could create a safety problem.
Derivation
From 'guard,' meaning to protect or shield. The cover literally guards the switch from being moved unintentionally.
Why Pilots Care
Prevents unintended activation of important systems during turbulence, vibration, or normal hand movements in the cockpit.
Analogy
It is like a safety cover over a light switch at home: you can still use the switch, but you have to make a clear, intentional movement first.
Intuition Check
Guarded does not mean the switch is locked or unusable. It means a cover or barrier helps keep the switch from being moved accidentally.
Example Sentence 1
The fire extinguisher discharge is on a guarded switch so it can't be activated by accident during normal operations.
Example Sentence 2
During the emergency descent checklist the crew moved the guard aside and activated the switch.