Specifications

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6.1.3.2 VHF Antenna
When individual GPS antenna is used, the CX4 VHF antenna must also be connected.
Location of the mandatory AIS VHF-antenna should be carefully considered. Digital
communication is more sensitive than analogue/voice communication to interference
created by reflections in obstructions like masts and booms. It may be necessary to
relocate the VHF radiotelephone antenna to minimize interference effects.
Install the VHF antenna referring to drawings in beginning of this chapter
The antenna should be connected using RG214 cable or better using BNC connector on the
transponder end and PL259 connector on the antenna end.
Calculation of cable length/attenuation etc… is described in chapter 6.2