PHASE III 6396-AIS-R 4' AIS Antenna 3dB Gain Specially engineered for the extra bandwidth required by AIS transceivers, this Phase IIIT antenna enables reliable communication over marine VHF frequencies. * Silver-plated outer conductor, copper inner conductor * Stainless steel mounting sleeve * SO-239/PL-259 connector Specifications * Max. Power Input: 50 watts * SWR: Less than 1.5:1 at 162 MHz * Bandwidth: 5 MHz within 2.0:1 VSWR * Frequency: VHF AIS Marine Band * DC Grounding: Yes * Pattern: Omnidirectional * Polarization: Vertical