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Old 02-21-2013, 02:38 AM
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Default Lowrance Point 1 antenna ?

Just heard that Lowrance is releasing a new antenna with build in gyros soon, I heard that it can be used as source for radaroverlay.
Is it a "real" compass, or just a very good antenna ?
Can it replace the RC42 autopilotcompass ?
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Old 02-21-2013, 02:53 AM
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It's a combined GPS and heading compass.

It has a 3-axis magnetometer, 3-axis accelerometer and 3-axis rate gyro. The combination of these sensors and the gps is similar to Airmar G2183. I ussume Link-1 is using lower cost sensors and a simplified calibration procedure compared to G2183.

According to Navico the new heading sensors (Lowrance Point-1 and Simrad RS35) are inteded for radar overlay, but don't have the required performance for MARPA and autopilot.

Last edited by abbor; 02-21-2013 at 04:06 AM.
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Old 02-21-2013, 03:20 AM
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Thanks Abbor

So - It can not replace the RC42 !. So its there is not a "real" compass build in. Its still use the satelites to calculate the direction, and it can not do that at absolute zero speed - it has to be "moved". Is that correctly understood ?

I also heard that Point 1 will shut heading off if another heading sensor is in the network ! does that also include the a heading sensor in the NMEA 0183 network ? (which i have)
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Old 02-21-2013, 03:38 AM
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A 3-axis magnetometer combined with a 3-axis accelerometer is the same as an electronic compass.

As a heading sensor for radar overlay Link-1 will do a similar job as RC42, it will work also when not moving.

I don't know anything about disabling of heading PGN's, but it's not uncommon for some devices to disable one or more PGN's if another source is detected in the NMEA 2000 network. PGN's will not be disabled based on what is happening on NMEA 183, but if the MFD is bridging from NMEA 183 to NMEA 2000 this can cause PGN's to be disabled.
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Old 02-21-2013, 03:51 AM
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A 3-axis magnetometer combined with a 3-axis accelerometer is the same as an electronics compass.

The compass will as any other magnetic compass of course also work when not moving.

I don't know the details when it comes to Point-1 communications, but it's not uncommon that some PGN's are disabled when another device sending the same PGN's is detected. Disabling of PGN's will not happen due to what is happening at the NMEA 183 side, but if the MFD is bridging NMEA 183 to NMEA 2000 PGN disabling may happen.

The cost of only calibrating a high accuracy heading sensor like RC42 or H2183 is probably comparable with the total cost of a devive like Link-1 out of the factory. The simplified calibration scheme combined with usage of cheaper sensors of the same type as used in smart phones and tablets is probably the reason why Link-1 is not suited for demanding applications like MARPA and autopilot heading.

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Old 02-21-2013, 11:10 AM
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Remember mounting location also affects suitability of a compass for MARPA and AP.
RC42 will be down low ideally, Point-1 will be on the roof, up on a spreader, maybe on a pole.
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Old 02-21-2013, 12:34 PM
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Will this be compatible with any NMEA2000 plotter? I have a Garmin 740 with radar that I would like to have the radar overlay while not moving.
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Old 02-21-2013, 12:36 PM
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Yes, Point-1 will work with any plotter with NMEA 2000.
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Old 02-21-2013, 09:14 PM
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Could someone explain how the term "gyro" as in gyroscope has become associated with this device? I though the compass was a magnetic compass, not a gyro-compass.

I understand the device might have accelerometers, but I was not aware that an accelerometer implies a gyroscope. Is there something spinning inside this POINT-1 device?
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Old 03-11-2013, 12:25 PM
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I am a bit confused on this Point-1 Antena. Can we replace the LGC-4000 for a Point-1?
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Old 03-12-2013, 01:19 AM
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Quote:
Originally Posted by jhebert View Post
Could someone explain how the term "gyro" as in gyroscope has become associated with this device? I though the compass was a magnetic compass, not a gyro-compass.

I understand the device might have accelerometers, but I was not aware that an accelerometer implies a gyroscope. Is there something spinning inside this POINT-1 device?
It's not a gyro compass, but in addition to the 3-axis magnetometer and 3-axis accelerometer this unit also has three miniature rate gyros which are used to measure the rotation of the boat in all three axis.
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Old 04-12-2013, 06:51 AM
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Will this antenna work on a HDS8 Gen 1 ?. ( Radaroverlay ?- 10HZ - heading )
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Old 04-12-2013, 07:04 AM
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Quote:
Originally Posted by peterSnow View Post
Will this antenna work on a HDS8 Gen 1 ?. ( Radaroverlay ?- 10HZ - heading )
Yes it will work with a HDS8 Gen 1 and yes it will provide radar overlay.
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Old 04-12-2013, 07:20 AM
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The manual for the sensors says that Point-1 will stop sending heading information if there are more than 1 heading sensor on the network, but the GS25 and ZG100 will still output data.
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Old 04-12-2013, 08:12 AM
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has anyone purchased this? and has it "in-use"

I was about to find an lc-4000 and now will look to this as an option...
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Old 04-12-2013, 09:57 AM
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Quote:
Originally Posted by westiemax View Post
has anyone purchased this? and has it "in-use"

I was about to find an lc-4000 and now will look to this as an option...
Fishton has a write-up somewhere on here and on his Facebook page. I believe he indicated the EPE for the GPS is better (less positional error) with the Point-1 than over the LGC-4000 and even more so than the internal antenna. Given they are the same price, seems a no-brainer if you were about to get an LGC-4000 unless they drop significantly in price as a result.
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Old 04-12-2013, 02:01 PM
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Has anyone used one of these on a Garmin network?
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Old 04-07-2014, 09:20 AM
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I would assume that the Lowrance Point 1 would work as a good heading sensor for radar/chartplotter overlay with a Furuno vx2 system? Or would I gain something by using an Airmar 2183 instead?
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Old 04-07-2014, 09:36 AM
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Quote:
Originally Posted by chrisrack View Post
I would assume that the Lowrance Point 1 would work as a good heading sensor for radar/chartplotter overlay with a Furuno vx2 system? Or would I gain something by using an Airmar 2183 instead?
I believe the Point 1 is NMEA2000 only. I think the Airmar is NMEA2000 and 0183 also.
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Old 04-07-2014, 09:43 AM
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From what I'm reading Greg, the Point 1 replaces Navco (Lowrance) GPS antennas and is not compatible with Garmin or Furuno. But I've also read conflicting statements as well.
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