Plain English Meaning
Two things placed at the same spot. For navigation aids, it means the equipment sits in the same place on the ground, even if it serves different purposes.
Full Definition
Located together at the same physical site. In navigation, two facilities are collocated when their antennas or transmitters are installed at the same location, allowing them to share a common reference point for defining a fix or intersection.
Context Anchor
Seen in instrument navigation discussions, especially when identifying intersections or describing navigation equipment installed at the same site.
Derivation
From Latin 'com-' (together) and 'locare' (to place). Literally 'placed together.' In aviation it carries that exact sense — two facilities placed at the same location.
Why Pilots Care
Collocated provide reliable, and distance information without offset when defining or .