On Fri, 30 Apr 2004 08:32:59 +0100, "Dennis Pogson"
wrote:

Link the input wire from the Furuno to your PC also to the Uniden, since it
is obviously working and transmitting NMEA sentences.

In the interest of brevity, I didn't mention that the two outputs
(data 1 and data 2) are also labelled "Current Loop" and "RS-232C" so
they must have different electrical characteristics. They share a
common return terminal on the GPS.

I've sent the question to Uniden also.