Some objects like lighthouses have a given height which is the height of its light above mean high water spring tides, or the mean sea level in places where there is no tide.
Ezinye izinto ezifana nezindlu ezikhanyayo zinobude obunikiweyo obubude bokhanyo ngentla kokhohlakelo lwamanzi anyukileyo, okanye ukhohlakalo lweqondo lolwandle ezindaweni apho kurhoxa nokuzala komlambo.