Are they a great help ? What difference do they make in mapping and way point accuracy ?
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Are they a great help ? What difference do they make in mapping and way point accuracy ?
Without one any marks you make will be off by the distance between your unit and the transducer. With it if you can locate it as close to over the transducer the more accurate it'll be.
I have three high speed GPS antennas on my boat. One is for the T/M and the other two are mounted right above the transducers. The high speed GPS antennas are more accurate than the older ones, I get a better/faster boat positioning. One is on top of a ducer mount from Ricky, the other is mounted on the transom angle plate. As stated when I mark a waypoint it is spot on. Without, you are marking possibly 6 foot away as with my boat being a 16 footer. Attachment 381151
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I got mine to help with direction pointing. When your barely moving, sometimes the heading just jumps all over the place without one.
Is this high speed heading sensor any different than the GPS heading sensor I purchased 7-8 yrs, ago back when I was running a 1298 KVD before I upgraded to gen 3 helix. Trying to figure if there is now a newer more accurate one out there. Scott
The High Speed GPS antenna # 408400-1. MASH-UPS HS PRECISION GPS. It will have a little arrow on the front of it so when you mount it, that points forward.
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I bought mine for the sole purpose of seeing my boat position on the screen instead of the doughnut.
Really helps me get to the spots I want to fish.
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They seem to be in short supply . The ones that say they are in stock guarantee shipment with in 10 days . The ones that will ship In a few days want 70.00 more . Not In that big a hurry . Will get one from BB and G Marine .
FYI - AnchorExpress.com has them for $148.99 + $10.99 Shpg
Humminbird AS GPS HS Precision GPS Antenna with Heading Sensor - 408400-1 | Anchor Express
I ordered mine from them on 8/3, they took my money and sent me a confirmation and said I would get another email when it shipped. No email so far. They may be out of stock too, and just not showing it on their site.
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I sent them an inquiry through their Contact Page on the web site, asking if they had the Item in stock and ready to ship. Here's the reply;
"Department: Sales
That item is currently out of stock.
We do not have a date from Humminbird for their next delivery at this time.
Thank you,
Anchor Express Customer Support
(866) 888-2624
So you may want to cancel your order and get a full refund.
Thanks, sent them a cancellation request this morning and they have refunded my payment.
The search continues.
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Fishfinders factory outlet. 169.99 AS-GPS-HS. #408400-1. Amazon 161. In stock
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