"Birdog" wrote in message
...
hello

there a company called marine electronic supplies (MES) and i think
there in southampton, but i moght be wrong. they do a box called an nema
splitter, feed a gps in and you can get anywhere from 2 to lots and lots
of outputs, think they start around £200,

But you cannot use a splitter to combine the outputs of different
instruments together to one. That can only be achived by a multiplexer.

Meindert