An antenna consisting of interconnected parallel dipoles separated by a small fraction of the wavelength of operation, connected together at their outer ends, and fed at the centre of one of the dipoles.
Reference: B.S. (modified)
Please note that this is the term as it stands in the original IALA Dictionary edition (1970-1989)
Centre of buoyancy
International Association of Marine Aids to Navigation and Lighthouse Authorities - AISM