In article ,
"Gordon" wrote:

Smart Radio (Milltech Marine) offers an active splitter so you can use the
same antenna for both vhf and ais.
However, it seems expensive. So what is an active splitter? (Does it turn
flips to or just splits?) Why so expensive? Is there a substitute?
Thanks
Gordon

Probubly an RF Activated Antenna Switch with internal 1/4 Wave Stub
Grounding on both radio ports, if it is designed for full AIS
Transponder operation. Seems kind of a stupid idea, if it costs more
than a second antenna would cost. But hey, what ever blows youe skirt
up......