Lowrance GPS Question?

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Originally Posted by rnvinc

The horse is never dead until HB forces RGecy to remove the "donut" from the HB wish list... ALL SI Models - Unit loses GPS signal at slow speeds - Below .6 mph

Then, and only then, will I give up on HB listening to their customers thru the HB "wish list"...

Rickie

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I went over there and read that. Saw my old pal moose1am there. He an expert on gps now. ha. He still owes me a truck. I won it fare and square.

MY Ipilot can track a course at .2mph. Stays on the recorded track pretty good too. Wonder how it does this if the accuracy is just 3 metres only 95 percent of the time. Must be something in the algorithm section of the track program. haha DLOP. Just something to ponder fellers. I don't have a HB so I have no futher comments. MIght get one next week though if it is a good deal.

Quote:

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Originally Posted by rnvinc

The horse is never dead until HB forces RGecy to remove the "donut" from the HB wish list... ALL SI Models - Unit loses GPS signal at slow speeds - Below .6 mph

Then, and only then, will I give up on HB listening to their customers thru the HB "wish list"...

Maybe all the people who do not believe in HB's "wish list" function of "listening to their customers" should start a "movement" and contact HB with requests to remove the "HB Donut" from the HB wish list as a technological impossibility....

(Lowrance would be grateful for the added sales...)

Rickie

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Is that the thread with 1306 views, and only 16 replies? Hmmm? Why would they "force" RCegy to remove the post? Doesn't sound like that many H/B owners are concerned about it.

People get mad about the donut, but with all the HDS features on the HB wish lists you'd think that would create a stink. I guess if you loyal to just the name, you could always just put a sticker on the other brands unit.

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Originally Posted by Cane Pole

what about L5?

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L5 is at least several years out. Even L2 can't give you high accuracy and rapid updates like would be required to see constant slow speed updates.

I kind of think somebody will integrate this little guy with a GPS and make something really nice.

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Originally Posted by CatFan

L5 is at least several years out. Even L2 can't give you high accuracy and rapid updates like would be required to see constant slow speed updates.

I kind of think somebody will integrate this little guy with a GPS and make something really nice.

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I thought L5 was coming 2014? I know they are putting sats up and running them tandem to then existing ones. But, it is the government deal.


Interesting little feller there on that link. I wish I could live forever, but I have seen so much and been part of so much technology. Hard to let it go.

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Originally Posted by Cane Pole

I thought L5 was coming 2014? I know they are putting sats up and running them tandem to then existing ones. But, it is the government deal.


Interesting little feller there on that link. I wish I could live forever, but I have seen so much and been part of so much technology. Hard to let it go.

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It depends on a lot. It takes 24 L5 satellites to begin using it. If the European sats and US sats work together and IF enough of them get launched and IF somebody markets a dual freq receiver, it could be as early as 2014. 2018 is a better guess, because it then there will be enough US sats to run the system. Earlier in its life, the only receivers available probably will be dual-band L1-L5 and will probably be too expensive for fishing boats. But I never imagined I'd see the day that fishing boats would be running $5000 worth of electronics either!

Hello all, my first post here, I got hooked on this site buy the poor mans i-pilot post.

Airmar has the GH2183 GPS & Heading sensor at least it is only 750.00.

I think i-pilot uses very similar setup to the airmar and that is how it can follow a track so closely. I think with the accelerometers and the e-compass you can have additional parameters to incorporate in to the dampening algo's. If you are very confident of where you are now and you get indication you are somewhere else that is not backed up with accelerometers and the e-compass data wait a second (or part there of) till all 3 jive. Street GPS's do this with a road reduction filter, a reference DB of highly accurate surveyed road positions.

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Originally Posted by CarolinaJim

Hello all, my first post here, I got hooked on this site buy the poor mans i-pilot post.

Airmar has the GH2183 GPS & Heading sensor at least it is only 750.00.

I think i-pilot uses very similar setup to the airmar and that is how it can follow a track so closely. I think with the accelerometers and the e-compass you can have additional parameters to incorporate in to the dampening algo's. If you are very confident of where you are now and you get indication you are somewhere else that is not backed up with accelerometers and the e-compass data wait a second (or part there of) till all 3 jive. Street GPS's do this with a road reduction filter, a reference DB of highly accurate surveyed road positions.

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It just want work with my HDS.

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Originally Posted by Cane Pole

I went over there and read that. Saw my old pal moose1am there. He an expert on gps now. ha. He still owes me a truck. I won it fare and square.

MY Ipilot can track a course at .2mph. Stays on the recorded track pretty good too. Wonder how it does this if the accuracy is just 3 metres only 95 percent of the time. Must be something in the algorithm section of the track program. haha DLOP. Just something to ponder fellers. I don't have a HB so I have no futher comments. MIght get one next week though if it is a good deal.

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The quote from Tom above should tell something about this "donut" conversation....

I can understand people not agreeing with my opinions... I'm no expert on these things...

But if Tom says there is technology that will track down to 0.1mph, and he has proof of it...in his electronics...

Why do people keep discounting this possibility that the technology exists for a HB unit to track below 0.5mph...??

Rickie

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Originally Posted by Cane Pole

what about L5?

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I worked with the FAA for many years. I worked on WAAS and GPS design. I retired in '06. As of that time, there was no GPS receiver, even WAAS enabled that could completely eliminate satellite and interference related errors. There is even a worm that wanders around the atmosphere that interferes with GPS accuracy. The faster you are moving, the more accurate it becomes and the slower you are moving the less accurate it becomes. If you are moving extremely slow, you are much more subject to the error. Receivers can average out readings by taking multiple samples and averaging the differences but the error is still there. WAAS uses a stationary antenna at a known location and transmits differential signals that help to compensate for the satellite wobble, drift, intentionally induced errors. (Yes, the military can make GPS totally useless if they want) Even with the WAAS input, there is some error left. Until you can account for such things as reflections, atmospheric interference, electromagnetic interference, and someone getting between the receiver and one of the satellites, you will never have a unit that depends solely on a satellite for it's location.

I worked with Inertial Nav systems in the Air Force and while they are quite accurate, they are mechanical. The usually consist of gyros and accelerometers. Each is a mechanical device and as such is subject to friction and wear.

It appears to me that Humminbird is simply admitting when it is not able to provide precicse data by displaying a circle. Lowrance just makes you feel good.