Raymarine a50d

[hooked-up03]

I am looking at buying this unit and installing on my 22' Roabalo center console. I fish the middle and lower bay and need to know how it works with pre installed charts or if a chip is necessary. Also my T top is composite not fabric and wondering if internal gps sesor will work ok. If anyone has one let me know what you think. Thanks Big Dave

[rmamechanic]

I have an E80 on my HS 220 cc with the composite top and it has an external antenna mounted on the T-top. I noted somewhere in the manual that the GPS antenna has to be mounted so that the radar does not interfere.