Check the listing for details. Digital 598-SW-S 8' White AIS Antenna. Condition: New. Listed at 467.08 USD. Digitnal Antenna 598-SW-S 8' 4.5dBi Gain Premium AIS AntennaModel: 598-SW-S Designed for use with Digital AIS signals4.5dBi omni-directional gainPowerful brass radiatorsRugged UV stable polyurethane finishSecure soldered connections316 stainless steel baseVSWR 1"x14 female threaded baseFactory installed mini-UHF connector5 year warranty Digital Antennas AIS (Automatic Identification System) antennas provide optimal signal integrity and maximum range for digital AIS signals. The 598-SW-S is designed for AIS frequencies with a low 25 of premium low-loss RG-8X cable terminates in a factory installed mini-UHF connector. The included PL259 adapter makes a simple and secure connection to the AIS transceiver. A 316 stainless steel ferrule and UV stable polyurethane coated rod provide superior longevity in the harshest marine environment.