Having got to the stage where my A65 chartplotter
was loosing its fix occasionaly I recently connected a surplus evermore GPS head
to it. The results where impressive. From finding 5-6 sats its gone to finding a full page of them and at full strenght signal. I'm not saying the R12 antenna
is bad but it is a much older chipset. I would recommend anyone using the older raymarine
chartplotters/mfd's to try this. Only drawback is you will probably have to splice your connector on the evermore. I used an evermore sa320 but I believe the 920 is even better.