KEY FEATURES HA156 is a 15cm VHF heliflex antenna, this is specifically tuned to AIS (162MHz) frequencies for optimal performance and it will perform as well as much larger. It’s lightweight and also has low windage and the L bracket we supply creates for easy installation onto any vertical surface. It includes 20m cable with BNC connector for any AIS products such as our Class B AIS Transponders or AIS receivers. SPECIFICATIONS VHF heliflex antenna Ultra light weight helical construction 15cm height Tuned to AIS (162MHz) frequencies for optimal performance Unobtrusive design for mounting at deck level 20m cable Can be used as emergency backup VHF aerial BNC connector