I recently mounted the gps receiver to my boat. I purchased the external AS GPS HS instead of using the internal receiver on my 1199 unit. I did not have a good level surface to mount the transducer to so I got creative. I have attached pictures of how I mounted the GPS puck. Using a RAM mount is great because I was able to properly orient the puck with the heading of the boat and also keep it level with the world. I used some 3/4" HDPE plastic along with the RAM mount to make a great, adjustable mount. I thought someone else may be in the same position and could use the idea.