Oh My Gosh. Everything in one place. I know what I will be doing for the next few weeks....reviewing all of this valuable information so that when my 1198 gets here, I will have jump started my learning curve thanks to this thread. Thank you one and all.

Optional XM Nav Weather

Here are some examples of getting weather radar direct on your Humminbird. When an alert is issued it will display the alert on any screen notifying you of approaching hazardous weather in your location.

i need some info on trolling motor mounting.

I'm debating getting a 570di. I have a 24foot pontoon boat and having a finder on the back does me absolutely no good when I'm actually trying to find fish and is even worse when Im' in a cove or shallows due to the fact that everything I see is officially ancient history being 24feet behind the front of the boat.

Do you need a special transducer for trolling motor mounting or will the one that comes with your depth finder work?
Do you really just strap it to the motor?
how does it deal with the motor rotating?
is there a smarter way to mount a transducer to the front of a pontoon boat that could maybe enable me to leave the thing in the water and functional at full speed?

www.transducershieldandsaver.com builds a mount for the DI Transducer.

Neat Historical Facts about Humminbird:



Digital Sonar - An Explanation

Sonar by its very nature uses an "analog" sound wave that is transmitted into the water by the fishfinder transmitter. These sound waves travel into the water on a carrier frequency such as 200kHz. These sound waves echo off the bottom, fish, and structure creating many varying sonar echoes that return back to the receiver on the analog frequency. This analog signal is then converted to digital within the fishfinder by virtually all marine electronics companies - the differences lie in what point within the sonar system the conversion takes place. Those promoting "digital" sonar convert these analog signals to digital within a sonar receiver itself. Humminbird converts analog signals using the analog to digital capability of the on-board microprocessor. Therefore, Humminbird offers digital technology, however the conversion from analog to digital just occurs differently that what is being promoted by others. It is interesting to note that Humminbird has been converting analog to digital in this manner since 1989.

Infinite Variable Bandwidths

Further benefits of units marketed as "digital" sonar include technology such as adaptive transmitters, and "virtually" infinite variable bandwidths. It is important for the consumer to know that these benefits are not limited to the methodology of the so called "digital" sonar products. If fact these and other techniques are central to Humminbird's Professional Grade Sonar. Humminbird transmitter design offers adaptive technology that modulates power and pulse width based on conditions.

Additionally, our receiver offers variable bandwidth and wide 90db dynamic range to hear both high and low intensity signals simultaneously. Another key benefit touted by marketers of "digital" sonar is the use of filtering algorithms in their design to remove unwanted noise and clutter. The use of filtering techniques produces results counter to the desires of all anglers, since these "intelligent" algorithms actually remove information that is important to the angler - such as detail in structure and fish. This is clearly evident when comparing on-water sonar images from the "digital" products to the same structure when viewed by a Humminbird product.

Humminbird has been Digital...long before Digital was a cool buzz word...And Broad Range of Listening to Sonar Returns.

Screen and Display Comparison Data:

Square Inches of Sonar Data Display Area less Readouts:

798c = 12.234 Square Inches
898c = 16.031 Square Inches
998c = 21.312 Square Inches
1198c = 48.156 Square Inches

Display Size is usable area of the screen less readouts. Screen is the Display Size.



TMike's Physical Image Comparison Image:

i stumbled across this forum and i am blown away at the plethora of information provided in just this single log. i am in need of some information and advice that i cant seem to get a straight answer for. what is the difference between the new HD resolution and last years non-hd. (yes i know and understand it on tv's but on a 5" screen???) i am contemplating a 597 ci HD DI Combo vs. last years 798c SI Combo. ANY INSIGHT OR COMPARABLE SCREEN SHOTS APPRECIATED. THANKS

Doug will jump on here and confirm but what I have read is it's just in the name. Now the difference in the 597 and the 798 is side imaging which if I was debating between the two and the "HD" did actually make a difference in screen quality, it still wouldnt be enough to overtake the possibility of have SI.

HD Designation is to tell the public the 5" Screen is the Industries Highest Pixel COunt Display of 640 Horizintal and 640 Vertical Pixels. This is new on many of the 500 Series Models and has been the same on the 700 Series for several years. On the 700 Series HD unit it also signifies that the unit is Ethernet Capable Unit and 2011 Model.

i knew about the Ethernet but since i wont be multiplexing 2 units i'm not worried about it. my post was a bit off, 2 weeks ago i bought a new 597 at BPS for $650 because i couldnt drop 1k for the sidescan but thats what i really really wanted. over the past few days i have been talking to the techs at Humminbird, trying to tweak the 597 in and 2 days ago they tipped me off to looking around for last years 798 at a discounted price. so now i had that idea stuck in my head and because of that my 597 was not what i was happy with anymore. yesterday i found the 798 on humminbird's site for only $100 more than i paid for the 597. now i am trying to recover as much as i can for my 597. (anyone interested???)

I ORDERED 798 SI YESTER DAY AT LUNCH FROM HUMMINGBIRD WEB SITE $ 771 WITH SHIPPING, BY FAR THE CHEAPEST SI IVE SEEN. AS I READ THRU THE THREAD CORRECT ME IF IM WRONG IT WILL DO DOWN IMAGING ALSO

Yes it will do down imaging.

Only price I found on HB site for the 798 ci HD Si was $1049?? I didn't see one for $771? wish I would have. Just got mine from Digital oasis for $849, or are there 2 models?

Question: I noticed on my boat when installing the 798 transducer, my transom has a slight bow or angle from center to each outside corner. This slightly offsets my transducer from parallel with the back of the boat, I went ahead and mounted it at the angle rather than try some kind of shim, because I was worried about obstruction the SI.

Any problems with it this way? it is maybe 1-2 degrees off I would guess, but I believe the SI transmission will be unobstructed.

They are the 2010 798c (NON HD or NON Ethernet Models)these units where replaced by the 2011 Model 798ci HD.

Closeout Section at Humminbird:
http://store.humminbird.com/category/78409/Closeouts