If an aircraft has a movable payload (e.g. camera) attached to it, two of the status modes are caged and stowed.
Stowed indicates the payload is retracted and or in a locked position.
What is caged? I have found reference to "caged" in a couple of resources online, but the do not explain the term. In some documents about passenger aircraft, it refers to cages in the luggage compartment, but this is completely different.