The 2011 798ci HD SI comes with the Contour XD base mapping. That is similar to the former NVB that was an additional $200 and available on earlier models. The NVB was the 2006 issue of Navionics Hotmaps Premium for all regions plus the Navionics Gold.
The older base map is the Uni-map and basically featureless.

I know this site is for equiptment info inwhich you all have done an excellent job. But I have a trouble shooting issue. If this is not the correct place to ask for help I understand and will post in general equipment. I have a 1198si mounted on a 22' Pathfinder with a pocket tunnel hull. The problem is a low speed (3-5 mph ) and sometimes when sitting completely still the depth reading will go crazy. Readings are speratic up to 500+ feet. Usuall it will clear up if I run at a faster speed for a little bit, but may return when I slow down. Any suggestions as to what may be causing the problem would be greatly appreciated?

Post a picture or two of your transducer installation and transom at the hull bottom level.

This thread is for all things Humminbird. It is so all information is in one place and hopefully the next person that is experiancing the same issues or has the same question can find his answer here rather than scrolling through a hundred pages.

How are your transducers mounted? Does it do it at certain depths? What are your sonar settings? Many different variables that can effect performance. Are you running the latest software? One thing you can do is restore defaults or cross test on another transducer that is working correctly?

quick question jumping back to the 798. i used it yesterday for the first time and when toggling thru the views i didn't see a DI view. i thought with the 798 i could see both DI and SI. just curious....

is it a brand new 798 or a older model? the older models didnt have DI on it from the factory. register your unit on the humminbird website and download the updates, then you will have DI

Glad we're off of that front page. All the pics take it forever to load.

holy moly... i just did the update and not only does it now show DI but i have a good 1/2 dozen more views. (now i wish i had a few more short cut buttons)

what is the depth when you should change the setting from salt shallow to salt deep?

one thing I always thought would be cool was if humminbird threw three buttons on the I-pilot remote and allowed you to change quick views from your i-pilot remote

i haven't had this too long but i think the 3 preset buttons would be improved if each button was capable of 2 settings. that would give fast selection to 6 views using 3 buttons. (button one-push once for view A, push again for view B)

someone could just jump to view 5 just by hitting button 3 once.

just a thought

Doug has a video where he explains how the 3 buttons can be used to make 9 presets. you do this by programing the three buttons then use the view and exit button to go forward one page and the exit button to go back one page. when you use these one button pushes the quick view actually makes it very easy to get to 9 screens. The video I posted below, after I watched it isnt actually the one I was looking for, but im sure doug will jump on here and explain it better.

here ya go, this should help get 9 quick views with only a couple buttons pushed.

http://www.youtube.com/watch?feature=player_embedded&v=Je2KYuzn2Jw

OK, so looking at a Bird 898si combo, due to what seems to be everyones more favarable reviews of that unit over Lowrance HDS8. But I have 2 Lowrances, 1 at bow and 1 at console I would keep as not enough $ to make a complete transition. How is the best way to use this mixed combo?