Digital Yacht SPL1500 Antenna Splitter VHF/AIS [ZDIGSPLK1500]SPL1500 Antenna Splitter VHF AIS An AIS receiver or transponder requires a VHF antenna, but Digital Yachts SPL1500 AIS VHF antenna splitter allows an existing antenna to be used for both the AIS and VHF (DSC). Unlike most simple splitters, it can also be used with a class B transponder system and it incorporates special circuitry to ensure safe operation of the two transmitting devices. The unit has three simple connections one input for the main VHF