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Old 29-06-2020, 05:49   #1
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Furuno SCX 20 Satellite Compass

Anyone have experience with this device? I'm trying to improve heading data for pilot, MARPA, and radar overlay. Kind of tired of magnetic compass issues.
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Old 29-06-2020, 06:56   #2
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Re: Furuno SCX 20 Satellite Compass

I’ve seen them on super yachts as a gyro substitute

Never used one

Whats wrong with the new generation autopilot compasses ?
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Old 29-06-2020, 07:34   #3
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Re: Furuno SCX 20 Satellite Compass

Quote:
Originally Posted by slug View Post
Iíve seen them on super yachts as a gyro substitute

Never used one

Whats wrong with the new generation autopilot compasses ?
Never ending search for more accuracy more stability.
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Old 29-06-2020, 08:08   #4
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Re: Furuno SCX 20 Satellite Compass

Quote:
Originally Posted by Dockhead View Post
Anyone have experience with this device? I'm trying to improve heading data for pilot, MARPA, and radar overlay. Kind of tired of magnetic compass issues.
Nope haven't used em. At a quick glance they sound pretty good. I know you have been looking for something along these lines for a bit. How do the performance specs stack up?
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Old 29-06-2020, 09:15   #5
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Re: Furuno SCX 20 Satellite Compass

We installed the electronic rate compass required with our Simrad suit of chart plotter, broadband radar, and autopilot. It is reliable and repeatable. Since it is aligned to the vessel it registers the angle of the boat centerline which shows as a crab angle on the avatar of the chart plotter. The GPS gives true course over ground at the plotter including leeway and drift from currents. Our Simrad autopilot can be made to steer by GPS COG, rate compass, or to a distant GPS point. It can be made to reference either true or magnetic north. Compass variation in the Caribbean is big. The numbers shown by all of these various devices never agree. The only possible exception is dead down wind motoring with no current. The point is that you need to learn how to make these tools work for you. I also keep paper charts nearby.
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Old 29-06-2020, 10:10   #6
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Re: Furuno SCX 20 Satellite Compass

I just installed an SCX20 a couple of weeks ago to replace an infuriatingly inaccurate Aimar H2183 (dunno why the otherwise well-regarded 2183 never worked properly on my boat--maybe the 2 ton cast-iron keel ).

Due to an ongoing hatch replacement project, I haven't been away from the dock to perform a sea-trial yet, but the heading data provided by the SCX20 is spot on for the position of my boat in its slip. Not so for the 2183.

After some initial difficulty, I used my Actisense NGT gateway to run the Furuno SC Setting Tool to provide the necessary configuration coordinates for the SCX20. While I don't have a particularly large N2K network, it was necessary to disconnect many of the devices from the network to provide sufficient bandwidth for the Setting Tool to work. Once that was done, however, the tool worked well. (I've never experienced a similar problem with configuration software from other vendors, e.g. Airmar Weathercaster, Maretron N2KAnalyzer, etc, but there you have it...)

Hopefully, I'll be out on the water in the next couple of weeks and can provide a more comprehensive report later. I expect to use the heading data for better autopilot control and sailing performance data--not so much MARPA or fathometer corrections....
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Old 29-06-2020, 10:21   #7
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Re: Furuno SCX 20 Satellite Compass

Have scx21 for 0183. Got it when first available. Perfect.
Cross track usually 1 to 2 degrees. 50 x 24 . 50 tons. 7 knots.
Many problems went away.
Get it.
Always best to go with Furuno.
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Old 29-06-2020, 15:29   #8
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Re: Furuno SCX 20 Satellite Compass

I have a Raymarine set up with one of their EVG1. My problem is that it appears got quite a bit of Deviation, may be up to 10 deg. Due to my boat being steel I suppose and there appears to be no adjustment available for it.
It only matters when trying to get data for polar diagram.
Think such a devise as the SCX may solve my problem, or is there another method/devise. Apologies for thread drift.
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Old 29-06-2020, 22:11   #9
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Re: Furuno SCX 20 Satellite Compass

Quote:
Originally Posted by Tugwit View Post
I just installed an SCX20 a couple of weeks ago to replace an infuriatingly inaccurate Aimar H2183 (dunno why the otherwise well-regarded 2183 never worked properly on my boat--maybe the 2 ton cast-iron keel ).

Due to an ongoing hatch replacement project, I haven't been away from the dock to perform a sea-trial yet, but the heading data provided by the SCX20 is spot on for the position of my boat in its slip. Not so for the 2183.

After some initial difficulty, I used my Actisense NGT gateway to run the Furuno SC Setting Tool to provide the necessary configuration coordinates for the SCX20. While I don't have a particularly large N2K network, it was necessary to disconnect many of the devices from the network to provide sufficient bandwidth for the Setting Tool to work. Once that was done, however, the tool worked well. (I've never experienced a similar problem with configuration software from other vendors, e.g. Airmar Weathercaster, Maretron N2KAnalyzer, etc, but there you have it...)

Hopefully, I'll be out on the water in the next couple of weeks and can provide a more comprehensive report later. I expect to use the heading data for better autopilot control and sailing performance data--not so much MARPA or fathometer corrections....

Thanks. That sounds encouraging. Please post updates when you've been out with it.


I am changing for exactly the same reason -- an H2183 which is just not as good as it is supposed to be.
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Old 03-07-2020, 08:58   #10
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Re: Furuno SCX 20 Satellite Compass

Any other opinions on the SCX20 vs other compasses?


The price is about $1000 in the U.S. which is near the price of the cheapest GPS compasses previously, and less than half of the cost of the classic SC33.



The Furuno propaganda makes it look awfully appealing:


https://furunousa.com/en/products/scx20


But I don't know how it stacks up in real life. They claim 1 degree static and 0.5 degree dynamic accuracy; the H2183 claims 2 degrees dynamic accuracy, but I don't believe I have seen that kind of performance.
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