I have read that the GRP-HS & the Point 1 should be mounted as close to the front of the boat as possible for heading purposes.

What if you have your transducer on the stern? Wouldn't that make any WP you mark 17-20 feet off?

Also, it seems like both pick up RF more than a regular antenna. We have enough problems already

Finally, can you use them without having the Heading sensor activated? I see there are updates for the Point 1. I usually keep my eyes open when I fish.

I think the HS might be helpful for off shore