Hi all. I've been looking through the forums for information on the HB units. I am extremely new to SI so please be gentle. I am looking to purchase a unit for exploring fresh water depths to 200' or so. Looking for wrecks or other submerged items to be explored later while diving. I am not looking for fish. Nor do I necessarily have the need to have "live" info. It'd probably be best to review the SI data later if possible.
If I am correct (and that's not likely) it looks like the 898/998/1198 units all produce the same data, it's just the screen size that is the big difference. Please let me know if that is incorrect.
Also, most of the info I've seen on here are people who are doing stuff in pretty shallow water (less than 50'). While that would be nice, I'll probably be doing some stuff up to 200' of water (probably more like 100'-150'). I am sure the images break down, but I can't find out how much. Can I see a 20' boat clearly down at 150' or is it a speck on the screen that would take years of practice to notice? Would I "need" a towfish? I thought there was a transducer for deeper stuff, but I'm not sure whether that is needed or not.
Any help here would be appreciated. If you can point me to "SI for dummies" that would be most welcome as well. I have the basics I think, but maybe not.
Thanks,
Chris