I have on board devices from Raymarine, working under SeaTalk protocol
and also a Raystar plotter using a NMEA GPS signal. On the boat there
is a NMEA to SeaTalk Bridge Unit, so exists a "mixing" of all the
data. Upto now : no problems !

My question:
I would like to add a second GPS (Raystar 125) connecting its SeaTalk
output signal to the SeaTalk network. This would be meant to be a
reserve in case of failure of the first one. May I leave it in
operation, having GPS data coming from two devices, or it's better to
keep it off and disconnected while the first one is in operation ?

In theory there should not exist collisions on the talker side, but
what about same data flowing on the same network ?

Appreciated your comments

Manlio