Humminbird 998 GPS installation

[bowhunter1]

I just got a hb 998 and I am having some difficulty understanding how to set the GPS up. I am planning on installing it inches away from my unit so other then drill a hole and screw the GPS into it, is all I have to do is plug the GPS into the unit? Or do I need to wire the power and ground into the boat wiring? I don't understand the manuals descriptions on how to do it

[Professor29]

I've run the 997,1197 and currently run the 898..partner uses the 1198..and all the unit's just plug-in and play for your G.P.S....I personally have the head unit and the gps units very close to each other without a problem...partners boat has three different g.p.s. units...runs a plotter,depth finder and 1 as a spare to use in case of emergency..wiring nightmare if you've seen it..

[bowhunter1]

Thanks for the response!

[rnvinc]

For the best accuracy of marking (and returning to) waypoints...the GPS antenna should be as close to the Xducer as possible...

The horizontal distance between what the Xducer is "seeing under it" and the satillites the GPS antenna is "seeing above it" instills an automatic distance discrepancy in the structure you are marking under the boat in relation to the waypoint coordinates you are logging onto the chartplotter's map...

GPS and Mapping Information Resource

And Professor is correct in that the puck is plug and play...(unless you are networking more than one unit and you want a remote head unit to share the GPS antenna with the base unit...this would require some extra menu changes)...

Rickie

[vic n]

This may be a dumb question, and I don't mean to highjack the thread, but if the 998 comes with GPS, why add the additional puck? Do you feel it improves the accuracy?

[bowhunter1]

Rickie, I bought this unit because I am serious In regards to wanting to use and understand side imaging. I understand the concept of side imaging but I was wondering if you could show me they way as far as settings set points (noise, sensitivity, surface clutter ect.... ). For this unit.

[rnvinc]

Here is some good basic info for starters...

What settings should I use to get the best Side Imaging results?

Some things not covered in the Robert's link...

*Color Pallete will be different according to the ambient light at the time...experiment with different pallette choices thruout the day to see which looks better to your eyes at the time....(I like Inverse for cloudy days and blue or green for bright sunny days)...
*Overlay the "SI Enhance" menu onto the SI image to give instant access to several settings to play with...
*Higher "Sharpness" will make the image grainy but also make fish echos pop out on the screen...
*"Contrast" somewhere between 9-12 according to how much pixilation you can tolerate in the image...
*"Sensitivity" use as a brightness controll for the image...(this is the most used setting on my unit because deeper water will make the image darker-raise "Sensitivity"... Dirty water will darken the image-raise "Sensitivity"....softer bottom will make the image darker-raise "Sensitivity"...

Setting the SI display to 1 side only will in effect "zoom" the view of that side...(I use this scanning parallel to the bank looking for bream beds)...

Use 800kHz for best image detail of objects you want to discern under the Xducer...(image will be crisper but outside edges of image will be darker)
Use 455kHz for wanting to see objects farther out to the sides...(outside edges of image will be brighter but overall image will be fuzzier)...

Ask lots of questions....

Rickie

[rnvinc]

This may be a dumb question, and I don't mean to highjack the thread, but if the 998 comes with GPS, why add the additional puck? Do you feel it improves the accuracy?

The 998 comes standard with the external GPS antenna...

Rickie

[gotta_fish]

Man the more I read on the SI the more confused I get , I got the transducer switch installed and runn a 2d transducer while running higher speeds then switch over and run my unit a 998 split on di and si and it seems to be a little grainy on the di so ,is my wiring on the 2 different transducers to close I really don't have a lot of options on routing my wires because I have an aluminum boat .Hope I didn't high jack this post ..Thanks

[rnvinc]

Man the more I read on the SI the more confused I get , I got the transducer switch installed and runn a 2d transducer while running higher speeds then switch over and run my unit a 998 split on di and si and it seems to be a little grainy on the di so ,is my wiring on the 2 different transducers to close I really don't have a lot of options on routing my wires because I have an aluminum boat .Hope I didn't high jack this post ..Thanks

Post a screenshot of what you are seeing...

I rarely use DI in the HB SI series unit because of no dedicated DI crystal in the HDSI xducer...
(DI in the HB SI series unit is a computer generated image from data received by the SI crystals..it is very unlikely you will ever get satisfactory DI images in the 998)...

I'm curious as to why you use a switch instead of the AS SIDB Y cable for a separate 2d xducer....??

Rickie