Thread: birds

NO it doesn't have anything to do with the transducers it's the GPS Chartplotter PUCKS....The 999's have built in Gps. The 998's have an external puck that can be traded in for one with a heading sensor. Since you have already ordered the 999's if you want a true heading sensor you will have to buy an additional puck. I checked into it because I thought if the 999's had a built in heading sensor I might sell mine and order a new one, but they don't. I'd try it first before I spent the extra money on the 200 dollar pucks to show you which way your boat is pointing on the gps map screen, it may not be that big of an issue for you. But if you want to know which direction your boat is pointing at any speed you'll have to buy the puck's with the heading sensor, which run 200 each...They will show you boat direction at any speed, where the regular ones you have to be moving for the gps to pick up on your direction.... I know it's all confusing to me also, but I've been reading about them all week and e-mailing hummingbird to find out how I might get my boat direction to accurately show up on the screen. It's kind of difficult finding your marked spot if you cant tell which way your boat is pointing relevant to the marked spot.... You have to know which way north is, set your fish finder chart plotter to north up and kind of go from there. It isn't that difficult on navigation mode but would be a whole lot easier if you could tell which direction your boat is pointed at all times and just drive to your mark and not just when you are moving at a great enough speed for the gps to tell you. When I get close to my mark I have to guess and drive around until I get close enough to throw out a buoy, if I had heading sensor it would point my boat direction relevant to my mark.