Supergain ELBA AIS Antenna - 3 DB - 970MM / 38" length - with supplied bracket and integrated 20M / 66' RG58C/U coax cable. Elba AIS is a 3dB gain AIS antenna designed for Sailboats: it’s 970mm / 38” length and is very easy to install thanks to the supplied “L” bracket. With its black strong fiberglass whip and integrated 20m (66’) RG58C/U coax cable, it’s the best choice to have a stable AIS performance under any navigation conditions.