I have a 17.5 ft seanymph and is layed out like a great lakes walleye boat rather that a bass boat, deep and more room behind console and smaller bow deck vs large bow deck and little area behind console. I currently have a 899 hd si on my console and have been turning it around to us it while at the bow. I want a unit for my bow for jigging and dropshotting. I am looking at either the helix 7 sonar only(non GPS), helix 7 sonar/di only(non GPS) or the 859 hd. Not really considering the helix 7 GPS/sonar or helix 7 GPS/DI because they are priced the sames as the 859 and I really like the preset soft buttons of the 800 series but if the masses can make a argument then I am open to changing my mind. I have no intention at this time to upgrade my trolling motor to an ipilot link. The helix is cheaper/brighter but I would still have to use my 899 for GPS and mapping. The 859 would be able to network with my 899, has GPS, would be easier to use ipilot link if my current trolling motor goes **** up, and would allow me to move the 899 to stay pointing towards the rear of the boat to allow other people to use it for jigging/dropshotting, or would there be interference between the two unit running at the same time? So the way I see my choices are cheaper and no GPS or more money, GPS and networking (which I don't fully understand the functionally of other than sharing waypoints.)
Anybody have a similar situation and can share their insight.