Altair, is different to the other omni-directional antennas, in that it has a Radome with dimensions (diameter 250 mm/10'', height 300 mm/12'') allowing the installation of the vertical reception component inside. Altair is equipped with amplifier with by-pass function (50023/98.) In order to keep a balanced look of your boat, Altair can be matched to the VHF RA124, as they are identical in shape and size.