high focal plane buoy
Floating beacon whose light is especially high above the surface of the water.
waterline 
ladder 
For accessing the components at the top of the tubular structure.
tubular structure 
Columnar part of the superstructure that supports the day- and nightmarks and keeps them above the water.
daymark 
Navigation aid that is visible by day only; it displays various colors and signage.
photovoltaic panel 
Device that converts solar energy into electricity to power the light.
radar reflector 
Metal part that reflects ships’ radar signals so they can locate the buoy.
light 
Encoded light beam that serves as a navigation aid at night.