Characteristics of Aids To Navigation, Continued
Red and white vertically striped buoys (daymarks for daybeacons and
lights) are called safe-water marks. They are used to mark a
mid-channel, fairway, or landfall. Safe-water marks have white lights.
Black and red horizontally banded buoys are called isolated danger
marks. They are used to mark an isolated danger that has navigable
water all around it. Isolated danger marks have white lights.
Yellow buoys and beacons are called special-purpose marks. They are
used to mark anchorages, dredging, and fishnet areas. These aids have
Nonlateral aids are lights and daybeacons that have no lateral
significance in our system of buoyage. Daymarks for these aids are
diamond-shaped and will either be red and white, green and white, or
black and white. The light color will always be white. These aids are
used primarily as landmarks for navigation.