Beacons
Definition of a Beacon
A fixed man-made navigation mark that can be recognised by its shape, colour, pattern, topmark, or light character, or a combination of these.
Description of a Beacon
Can carry a signal light and in this case is termed a light beacon or lighted beacon;
If not fitted with a light it is termed an unlighted or unlit beacon and provides only a day mark;
As a leading line/range or conspicuous radar mark;
It may also carry a topmark.
Source: IALA