Digital Antenna 578-SW 4 AIS Antenna [578-SW ] Marine Hardware | Deck Plates Use an upper support bracket

Use an upper support bracket (sold seperately) if the lengt of antenna and mast total more than eight feet

Height: 19"

Gold plated

Backed by nearly 40 years of trim tab

Digital Antenna 578-SW 4 AIS Antenna [578-SW ] Marine Hardware | Deck Plates Use an upper support bracketAIS Antennas 4' Length, 4. 5dB Gain In conjunction with the USCG Automatic Identification System (AIS) requirements for commercial vessels, Digital Antenna created a series of 4 AIS antennas that meet the exacting AIS frequency requirements. Designed with a low 1. 5: 1. 0 SWR ratio from 159 162 MHz, Digital Antennas 4. 5 dB gain AIS antennas offer unsurpassed durability and performance compatible with all AIS transponders. Customers and installers