Thus theoretically, the head of one ski-boater, 5 ft. above the water, can be seen by a similar ski-boater 2.6 + 2.6 = 5.2 n. miles away.
Ngokuthetha, intloko yomhambi ngesikhephe esibhabhayo omnye, mayibe ziinyawozintlanu ingentla kwamanzi, ingabonwa sisikhephe esibhabhayo esifana naso 2.6+2.6=5.2n yeemayile ezikude.