Thread: still making comparisions

I probably didn't describe it as well as some could to make it easier to understand. I kind of ramble while I explain. The "heading sensor" function is the real reason/benefit to buying it.

Tight lines,
Joe

Originally Posted by wicklundrh

Having extensive knowledge in regards to grid and waypoint accuracy due to my time and training in the Marine Corps, I completely understand the technologies involved. I do however beleive that people have been sold a line of crap in relation to the point 1 antenna.

Placing the puck directly over your transducer isn't going to gain you a whole lot. The reason... most of these units operate on an 8 or 10 digit grid coordinate. An 8 digit grid is only accurate to within 10 meters. A 10 digit grid is only accurate to within 1 meter. 1 Meter you say... that is pretty close. Nope, not in relation to 1 meter of where you are at, but relation to within 1 meter of the "scale" of the mapping software you utilize.

" An often-confusing point is that most NIMA 1:50,000 scale maps are made to an accuracy of 50m
at the 90% confidence interval. This means that 90% of all well-defined points on a map will fall within a 50
meter radius of their actual position on the earth’s surface. The confusion comes in when soldiers try to
use a map to get a 10-digit grid coordinate, which equates to a 1 meter precision. A 1:50,000 scale map is
only accurate to 50m 90% of the time so a 6 digit (100m precision) or an 8 digit (10m precision) are more
appropriate. A 1:250,000 scale map maintains an accuracy of 250 meters at the 90% confidence interval."

So, having the puck over your transducer on an 18 foot boat where your helm is say, 6 feet away and your helm unit (with internal GPS) is sitting, is not any more accurate than simply utilizing the internal GPS software.

Relation has everything to do with mapping software and not the antenna. As for the heading, I've never had an issue with maps bouncing, spinning, or anything else. I troll 95% of the time. Whether it be on contours, point to point, or waypoint to waypoint.

That being said, if they give you the unit for free, you never sniff a gift fish, but I personally wouldn't purchase it as an add on. Not when you are talking mapping software that cannot realistically get you accurate enough to get you down within a specific perameter.

Spot On! The difference in distance of the puck and that of the internal GPS antenna isn't enough to spit at, let alone the cost of the puck! jmo

Sent from my SAMSUNG-SM-J320A using Tapatalk

Originally Posted by armyman

Spot On! The difference in distance of the puck and that of the internal GPS antenna isn't enough to spit at, let alone the cost of the puck! jmo

Sent from my SAMSUNG-SM-J320A using Tapatalk

Your missing the POINT (no pun intended) of the value in the "heading sensor" function of the Point 1 antenna. And I do believe it "helps" in accuracy the way I described setting it up instead of using the internal antenna of the units.... especially if your unit is an older generation unit that does not have as fast a refresh rate as the point 1 or gen3 units.

What y'all are saying, (that its close enough, and not going to make any difference if the gps source is directly over the transducer or if it is 10 feed away) would be like saying..... I'm going to shoot at this squirrel with this 12 gauge shotgun..... but I know that this shotgun has a pattern that spreads out wide..... so I will be fine aiming 6 feet beside the squirrel..... it won't make any difference.... or not enough to spit at!!. Sorry, not me.... I would still aim directly at the squirrel to maximize my chances. Just like if I have the choice, I want my gps antenna as close to the transducer as I can to not add any EXTRA inaccuracy to the already present inaccuracy when I mark a waypoint. Why compound it? All I can say is, It works awesome for me and going right to a saved waypoint is not a problem on the first try. But like I said before..... the point 1 is actually all about the "Heading sensor", not the gps antenna as much. I will NEVER own another system that does not utilize a Heading sensor.

Joe

I believe Humminbird also has a heading sensor gps puck that is an add-on accessory. It matters when you get to below .5mph or so. Anything faster and the gps will usually show boat travel direction. .5 mph and slower and you just get a red circle indicating your location on a map, not your direction of travel. Very frustrating when you are trying to sneak up on a fish crib and you lose direction of travel.

As for gps puck location. While I agree placing the puck over the transducer could be considered pointless considering the error built into civilian gps. I still like the idea of reducing error every chance I can cost justify.

The point one antenna rocks and I'm a brush pile and structure fisherman. You can fish without a marker bouy at times.

Yes, humminbird's heading sensor/ gps puck is the "as gps hs". Just as valuable as the point 1. When I switch over to humminbird in the near future, I plan on using one for both graphs. I will miss the fact that I can share the single Point 1 between 2 graphs like I can do with Lowrance though. But I believe going with onix or solix would give me that ability.... but I got my eyes on the Helix 10 Mega for the console and bow!! On the other hand, I like that you can hook the humminbird heading sensor up directly to the graph instead of needing the NMEA network like I have to use with Lowrance.

Originally Posted by Hanr3

I believe Humminbird also has a heading sensor gps puck that is an add-on accessory. It matters when you get to below .5mph or so. Anything faster and the gps will usually show boat travel direction. .5 mph and slower and you just get a red circle indicating your location on a map, not your direction of travel. Very frustrating when you are trying to sneak up on a fish crib and you lose direction of travel.

As for gps puck location. While I agree placing the puck over the transducer could be considered pointless considering the error built into civilian gps. I still like the idea of reducing error every chance I can cost justify.

Originally Posted by akaslyguy

Yes, humminbird's heading sensor/ gps puck is the "as gps hs". Just as valuable as the point 1. When I switch over to humminbird in the near future, I plan on using one for both graphs. I will miss the fact that I can share the single Point 1 between 2 graphs like I can do with Lowrance though. But I believe going with onix or solix would give me that ability.... but I got my eyes on the Helix 10 Mega for the console and bow!! On the other hand, I like that you can hook the humminbird heading sensor up directly to the graph instead of needing the NMEA network like I have to use with Lowrance.

AS GPS HS antenna can be shared over Ethernet between HELIX units ...

Both GPS and heading must be shared in HELIX ...

GPS or heading - (or both) can be shared in ONIX and SOLIX ...

Rickie

Originally Posted by rnvinc

AS GPS HS antenna can be shared over Ethernet between HELIX units ...

Both GPS and heading must be shared in HELIX ...

GPS or heading - (or both) can be shared in ONIX and SOLIX ...

Rickie

Thanks to everyone for their input. I learned a lot about GPS. That was not my question or statement. The statement was that the Lowrance hook 5 has about the same screen coverage as the helix 7 due to the loss of screen to overlay(temp, depth, and etc.). Ricky, are you able to turn the overlay off on all helix models , or just the 9,10, and 12 inch models. Sorry guys for not being more specific,but as always I gained a world of knowledge.... thanks for the comments.......crappie1133