Being 'Ground Plane Dependent' the antenna base needs to be in contact with a metallic surface (Ground Plane), such as steel or aluminium of approximately 0.5m2 in area or greater. Please Note: Fishfinders and other electrical devices can radiate varying levels of 'noise' during operation. To maximise the clarity of your transceiver signal avoid routing the antenna cable adjacent to transducer cables and other sources of possible interference. GME - The Company GME was established over 50 years ago with the intention of designing and manufacturing world class radio and communication equipment within Australia. GME products fall under the umbrella of Standard Communications Pty. Ltd. and proudly remain a privately owned Australian company. Their radio products are of the most reliable quality and have been depended upon by the Australian rural community and State Emergency Services. Should this product fail, you have the option of contacting the manufacturer / supplier directly. Browse all UHF antennas.