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Go Back   SailNet Community > General Interest > General Discussion (sailing related) > 3G Radar V/S AIS, or get both...
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Thread: 3G Radar V/S AIS, or get both... Reply to Thread
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Topic Review (Newest First)
02-08-2014 04:56 PM
knuterikt
Re: 3G Radar V/S AIS, or get both...

Quote:
Originally Posted by tdw View Post
Raymarine Pathfinder RL80C.
Bad news..
Unlikely that you will be able to show radar picture on a laptop or on a new MFD.

I was under the impression that we where talking about "modern" radars.

Most new radars use Ethernet to connect the radar "antenna" to the display, that is the reason that some of these can show data on PC's with Open CPN.

In modern radars all the picture processing take place in the "antenna", the MFD is only a display and control unit.

The Raymarine Pathfinder RL80C is already previous generation.
This unit does the processing in the display unit.

If you want to go for AIS there are several options
AIS receiver (go for a two channel), you can get VHF radio with built in AIS receiver (two channel is important here also)
or
AIS class B transponder (also two channel listening here)

By to channel I mean a receiver that will receive on both channels at the same time.

For display there are also a some options
- MFD that can display AIS data
- PC with suitable software
- Dedicated display unit
Or combinations of the above
02-08-2014 02:38 AM
tdw
Re: 3G Radar V/S AIS, or get both...

Quote:
Originally Posted by knuterikt View Post



You didn't say what kind of equipment you already have (make & modell)
Would make it easier to give a good answer
Raymarine Pathfinder RL80C.
02-07-2014 10:51 PM
Geoff54
Re: 3G Radar V/S AIS, or get both...

Quote:
Originally Posted by tdw View Post
Thank for clearing that up. Now I just need to figure out how to make my notebook talk to my radar.
I just started playing with Open CPN, so I am no expert but….

Open CPN has a plugin (GRadar) for Garmin digital radar which connects via the Ethernet cable. It can connect directly to or if you want the radar feed available to other devices, such as a Garmin Chartplotter, via an Ethernet hub. I believe that they are developing a plugin for Lowrance 3G, which I think also uses an Ethernet cable.
02-07-2014 08:58 PM
tdw
Re: 3G Radar V/S AIS, or get both...

Thank for clearing that up. Now I just need to figure out how to make my notebook talk to my radar.
02-07-2014 08:27 PM
knuterikt
Re: 3G Radar V/S AIS, or get both...

Quote:
Originally Posted by blowinstink View Post
Yeah - I wasn't clear. My understanding is that you can bring commercial radar into an openCPN platform on a laptop (but *not* into another manufacturer's CP).
Correct and only one or two I think
02-07-2014 07:59 PM
blowinstink
Re: 3G Radar V/S AIS, or get both...

Quote:
Originally Posted by tdw View Post
hmmm ... we use OpenCPN on a notebook. I didn't know you could use openCPN on a stand alone chart plotter or am I confused by your meaning ?
Yeah - I wasn't clear. My understanding is that you can bring commercial radar into an openCPN platform on a laptop (but *not* into another manufacturer's CP).
02-07-2014 07:55 PM
tdw
Re: 3G Radar V/S AIS, or get both...

Quote:
Originally Posted by blowinstink View Post
I think NMEA 2000 has done a great job of standardizing protocols for most components (there are still problems in that some manufacturers don't play nice and maintain some proprietary elements). My understanding is that radar is not among the standardized components. So, if you have a garmin radar, you will need a Garmin CP to display it. Like someone said above, openCPN may be the best way to bring radar data into a non-uniform (i.e., multi-brand) system. If anyone knows differently (i.e., how to bring BBR into a garmin system or Garmin HD into a RM system) please advise.
hmmm ... we use OpenCPN on a notebook. I didn't know you could use openCPN on a stand alone chart plotter or am I confused by your meaning ?
02-07-2014 07:22 PM
knuterikt
Re: 3G Radar V/S AIS, or get both...

Quote:
Originally Posted by tdw View Post
You are quite right. I thought I read 'broadband' on the Raymarine website but a quick check proved otherwise.
The newer radars from Raymarine, Garmin and Furuno also far better than their older cousins. but the use different technology than the broadband type radars.

Quote:
Originally Posted by tdw View Post
I'm not sure what you mean by "No there are no standard for interfacing radars with MFD's". Our older chart plotter displays both charts and radar though in separate windows.
I will try to explain.
In the "old days" we had dedicated units
A radar antenna connected to a radar display
A chart plotter connected to a GPS receiver

Today these will often be one box with one screen and control buttons, this type of units we call Multi Function Displays (MFD)
NMEA 0183 and NMEA 2000 are standards that make it possible to share data between devices from different manufacturers.
I have wind/speed/depth sensors from Raymarine connected to a box that convert sensor data into NMEA 2000 format.
This data can be displayed on both my Furuno MFD and my Raymarine i70 displays and be used by my autpilot from Coursemaster.

Modern radar antennas have all the "logic" in the antenna, and the MFD is just an display and control unit.

So if I added another Furuno MFD to my boat I would be able to view radar on both displays.
But if I add a Raymarine MFD it will not be able to show radar pictures from the Furuno radar

But the NMEA standard does not say anything about radar data, so that is why you must have radar and display from same manufacturer.


Quote:
Originally Posted by tdw View Post
We do already have AIS send/recieve via a newer plotter as well.

So many electronic gadgets for an electronic imbecile like me. Sigh.
You didn't say what kind of equipment you already have (make & modell)
Would make it easier to give a good answer
02-07-2014 07:01 PM
blowinstink
Re: 3G Radar V/S AIS, or get both...

Quote:
Originally Posted by tdw View Post
You are quite right. I thought I read 'broadband' on the Raymarine website but a quick check proved otherwise.

I'm not sure what you mean by "No there are no standard for interfacing radars with MFD's". Our older chart plotter displays both charts and radar though in separate windows.

We do already have AIS send/recieve via a newer plotter as well.

So many electronic gadgets for an electronic imbecile like me. Sigh.
I think NMEA 2000 has done a great job of standardizing protocols for most components (there are still problems in that some manufacturers don't play nice and maintain some proprietary elements). My understanding is that radar is not among the standardized components. So, if you have a garmin radar, you will need a Garmin CP to display it. Like someone said above, openCPN may be the best way to bring radar data into a non-uniform (i.e., multi-brand) system. If anyone knows differently (i.e., how to bring BBR into a garmin system or Garmin HD into a RM system) please advise.
02-07-2014 06:51 PM
tdw
Re: 3G Radar V/S AIS, or get both...

Quote:
Originally Posted by knuterikt View Post
No from Important Radar Information from Raymarine



No there are no standard for interfacing radars with MFD's
There are however one option, some radar units can work with Open CPN software.


If little fog and large merchant ships is your main concern an AIS receiver or AIS transponder seems like a better option.

I have both, but think that first choice depends on where and how you use the boat.
Large ships will be AIS class A equipped and will have rapid update on AIS.
The AIS will help give you CPA (Closest Point of Approach), TCPA (Time to Closest Point of Approach), speed, call sign, name ++ of the big ships.
You are quite right. I thought I read 'broadband' on the Raymarine website but a quick check proved otherwise.

I'm not sure what you mean by "No there are no standard for interfacing radars with MFD's". Our older chart plotter displays both charts and radar though in separate windows.

We do already have AIS send/recieve via a newer plotter as well.

So many electronic gadgets for an electronic imbecile like me. Sigh.
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