I hope you will all forgive me if I write this in English as I do not wish tha translator to make any silly mistakes.
So here it goes.
I have been trying to connect my GARMIN GPS to my ICOM VHF/DSC. So far reading the GARMIN manual got me no where. However, I emailed GARMIN and this is the reply they sent to me.
I hope that there is some benefit to who ever is interested to do this by him/her self
PS GARMIN have been always 1st calss in aftersales service