VHF antenna
DANGER
Ensure that your VHF antenna meets the requirements of the VHF antenna specification, which are detailed in the following section of this document: VHF antenna requirements
Using an antenna optimized for only AIS frequencies may damage the product.
Using an antenna optimized for only VHF frequencies may cause erroneous alarms.
Using an old antenna with degraded performance will result in reduced AIS performance.
New VHF antennas are sold with a fixed cable length. The cable length partly determines the antenna performance, and therefore cutting the cable of an antenna can affect its performance and result in a high VSWR ratio and limited reception.