Garmin sidevu

[Curly88]

Hi

I am wanting to add sidevu to my Garmin gpsmap 1020. At the moment I am running a Airmar TM260 1kw tranny. I have been down to my local Garmin dealer and told him what I want and he has been no help at all. I want to know what I need to buy to get this to work. I think I need a Garmin black box with downvu/sidevu transducer but will this interfere with my Airmar tranny. Also do I need to set up a NMEA startupkit on my boat to make the black box work?. People that have sidevu for there Garmin do you like it?. Is it good for finding baitfish when your outwide. Any help would be much appreciated.

Thanks Curly