Leading Lights (G.B.)
Alternative term: Range Lights (U.S.A.)
Two or more lights associated to form one or more leading lines (or ranges).
A leading line defined by two such leading lights is called the axis of the lights. (Fig.47)
Note: In Britain, the axis of the lights is often called the Line of Lights. In German it is called Richtfeuerlinie.
Please note that this is the term as it stands in the original IALA Dictionary edition (1970-1989)
International Association of Marine Aids to Navigation and Lighthouse Authorities - AISM