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New Nav Software
If you have any interest in what strikes me as a simple, complete and
truly user friendly nav software, you may want to investigate http://rosepointnav.com/default.htm I am not an employee, investor or anything like anything that would associate me with the company. My interest is only in finding what works, is simple to use and does it reliably. |
anchorlt wrote:
If you have any interest in what strikes me as a simple, complete and truly user friendly nav software, you may want to investigate http://rosepointnav.com/default.htm I am not an employee, investor or anything like anything that would associate me with the company. My interest is only in finding what works, is simple to use and does it reliably. There is a minimal description there, no page views, or real specifics. Have you actually tried this software out? Or maybe we could just cough up $300 and find out for you? :) Jack (speaking in jest but also curious about the new program). -- Jack Erbes in Ellsworth, Maine, USA - jacker at midmaine dot com |
"anchorlt" wrote in message
om... If you have any interest in what strikes me as a simple, complete and truly user friendly nav software, you may want to investigate http://rosepointnav.com/default.htm Mmmm.... that's the second time this week that it struck you..... I am not an employee, investor or anything like anything that would associate me with the company. My interest is only in finding what works, is simple to use and does it reliably. I wonder.... Meindert |
Strikes me too, having never seen it in the Boat Shows being sold next to
Maptech, Transas, and Nobeltec. Never heard of it. Are there free samples for us Marine elec. Techs to give you the REAL SCOOP, Or do I need to spend $300. Brian Remove NOJUNK from Email for responses via email. |
I haven't tried it personally, but the folks I know who have love it!
-- Keith __ "I feel sorry for people who don't drink. When they wake up in the morning, that's as good as they're going to feel all day."--Dean Martin "Jack Erbes" wrote in message ... anchorlt wrote: If you have any interest in what strikes me as a simple, complete and truly user friendly nav software, you may want to investigate http://rosepointnav.com/default.htm I am not an employee, investor or anything like anything that would associate me with the company. My interest is only in finding what works, is simple to use and does it reliably. There is a minimal description there, no page views, or real specifics. Have you actually tried this software out? Or maybe we could just cough up $300 and find out for you? :) Jack (speaking in jest but also curious about the new program). -- Jack Erbes in Ellsworth, Maine, USA - jacker at midmaine dot com |
anchorIt?
Oh come on Brad. You can come up with something more anonymous than that. Do you think this type of cheap advertising is how you'll build your company? No one is fooled by this type of thing any longer... "anchorlt" wrote in message om... If you have any interest in what strikes me as a simple, complete and truly user friendly nav software, you may want to investigate http://rosepointnav.com/default.htm I am not an employee, investor or anything like anything that would associate me with the company. My interest is only in finding what works, is simple to use and does it reliably. |
Can you integrate several Sensors?. Can it take into account advance and
transfer using ROT? Can you overlay a radar image on it? Can you incorporate ARPA targets? Can it display a vessel in heads up or north up mode? How many AIS targets and how much info will it provide? How useful is it? Every chart plotter out there can take a gps input and plop you on a chart. Its the periphials(Spelling?) that sell the software. The more info available to the skipper makes them more capable to make a informed decision when it counts. What are you comparing this software to? It really looks to me like it is very basic in its design. Send it to me and I will tell you what is really needed in it? I don't design software. I install it for ships and yachts. I am the one they call in the middle of the night when the @*?/ is hitting the fan. I have seen a lot of great concept software, but when push came to shove the support wasn't there and reliability was horrible. The web site says no phone support. Only email support. I don't know many captains jumping on their email when they can't view thier chart plotter. There are only 2 companies out there now, that I have seen stand behind there product and really make it work (Names to follow if asked). Sorry for the rant guys but this stuff is a very important decision an owner/ captain has to make. The type of plotter they use can sink and swim someone if it is not done right. If a plotter is not set up correctly or fails at a crucial moment then whats the use. You dont use a plotter on a nice sunny day. You use it when you are lost, tired, or in bad weather. Just a few of my thoughts Take them or leave them. Brian Remove NOJUNK from Email for responses via email. |
"NIFFOCBT" wrote in message
... Can you integrate several Sensors?. Of course he can; with our multiplexers :-) The type of plotter they use can sink and swim someone if it is not done right. If a plotter is not set up correctly or fails at a crucial moment then whats the use. You dont use a plotter on a nice sunny day. You use it when you are lost, tired, or in bad weather. Triggered by the above remark I wonder why no company has yet written a decent navigation package running on Linux. I know this will stir up something, but I have been on a ship, developing software to control a KVM switch that knitted 12 LCD's and 10 computers together. All computers were running XP (!) except the one I installed for controlling the KVM switch. This one ran linux and did the routing to four selectable internet connections as well. Many of these computers had the occasional crash, but the only one that kept on running was the Linux box. Meindert www.shipmodul.com |
Triggered by the above remark I wonder why no company has yet written a
decent navigation package running on Linux. Because once they made three sales to people who actually use Linux on their boat, they'd have 100% of the potential market... |
"BillP" wrote in message news:VgHXc.9$hq5.0@trndny09...
Triggered by the above remark I wonder why no company has yet written a decent navigation package running on Linux. Because once they made three sales to people who actually use Linux on their boat, they'd have 100% of the potential market... I think many people don't use Linux on their boat *because* there is no decent nav package. Meindert |
On Fri, 27 Aug 2004 16:42:29 +0200, "Meindert Sprang"
wrote: I think many people don't use Linux on their boat *because* there is no decent nav package. ============================================= And because it's a whole new learning curve to climb, not the most user friendly system in the world, and there's not much help available in the world outside of technology shops. All that, plus the lack of a standardized graphical user interface, means that its going to be a while before Linux shows up on our laptops. It may show up embedded in dedicated hardware however where we can't see it. |
Normally I would not get into the middle of a thread such as this, but
I feel the need to set something straight: I am not . He is a satisfied customer of ours, just as he says. In fact, we have never met and we live on opposite ends of the country. If you were to google his name you would find that he's contributed quite a bit to the Internet's boating communities. I will not attempt to correct the rest of the misinformation in this thread as I'm confident that time will take care of that... Thanks for listening, Brad Christian Rose Point Navigation Systems, LLC http://rosepointnav.com/ |
You got to be kidding me!!
Remove NOJUNK from Email for responses via email. |
On Fri, 27 Aug 2004 14:09:57 GMT, "BillP" wrote:
Triggered by the above remark I wonder why no company has yet written a decent navigation package running on Linux. Because once they made three sales to people who actually use Linux on their boat, they'd have 100% of the potential market... Make it four. I would gladly drop WIndows on any machine that didn't need it for a particular app. Mandrake Linux is the slickest and most troublefree installation I have ever tried. You don't have to be a geek to install it. Indeed it practically installs itself. So, for a boat computer, what do I need. A word processor for the log--Xemacs is fine A program to monitor the serial ports and log NMEA inputs and time-stamp them into a text file, that can be pasted into the log on xemacs. A nav-chart program that uses free vector charts. If I take it ashore to a modem connection, I use Windoze because I can run PMMail, a converted OS2 program that lets me check headeers on the POP3 server, and delete spam before I download messages. I haven't seen a linux app that works that way. All easy except the last two. I have no financial interest, etc etc. Rodney Myrvaagnes NYC We have achieved faith-based science, faith-based economics, faith-based law enforcement, and faith-based missile defense. What's next? Faith-based air traffic control? |
Wayne.B wrote:
On Fri, 27 Aug 2004 16:42:29 +0200, "Meindert Sprang" wrote: I think many people don't use Linux on their boat *because* there is no decent nav package. ============================================= And because it's a whole new learning curve to climb, not the most user friendly system in the world, and there's not much help available in the world outside of technology shops. All that, plus the lack of a standardized graphical user interface, means that its going to be a while before Linux shows up on our laptops. It may show up embedded in dedicated hardware however where we can't see it. I have to agree with you here. Although Linux certainly has critical mass on the server market, with a desktop penetration of about 1%, this is not viable as a consumer product. Perhaps if there is sufficient interest a bunch of us could develop our own opensource chartplotter software. |
"Wayne.B" wrote in message
... On Fri, 27 Aug 2004 16:42:29 +0200, "Meindert Sprang" And because it's a whole new learning curve to climb, not the most user friendly system in the world Mmm... ever tried to install the lates SuSE? Almost like windows... and there's not much help available in the world outside of technology shops. This is really amusing. Have you ever tried to get help for a windows related problem? Most computers are sold with XP OEM, where the dealer is supposed to support you. Most dealers only have the knowledge to tell you how to reinstall in case of a "dark" problem. Call microsoft and you have to draw your plastic first. Now in case of Linux, your just post your question in a linux related newsgroup and within the hour you have a dozen suggestions how to solve your problem. For free! All that, plus the lack of a standardized graphical user interface, means that its going to be a while before Linux shows up on our laptops. For eons, long before the conception of a windows-like thing on a PC there was X-windows for unix. And it's still there. Standard. The only thing that varies amongst installations is the window manager, responsible for the look and feel. But every linux distribution comes with the same set of window managers, of which KDE seems to be the most popular and the most windows-loolalike. How do you mean, there's no standard? Meindert |
In article ,
Lisa Collins wrote: Wayne.B wrote: On Fri, 27 Aug 2004 16:42:29 +0200, "Meindert Sprang" wrote: I think many people don't use Linux on their boat *because* there is no decent nav package. ============================================= And because it's a whole new learning curve to climb, not the most user friendly system in the world, and there's not much help available in the world outside of technology shops. All that, plus the lack of a standardized graphical user interface, means that its going to be a while before Linux shows up on our laptops. It may show up embedded in dedicated hardware however where we can't see it. I have to agree with you here. Although Linux certainly has critical mass on the server market, with a desktop penetration of about 1%, this is not viable as a consumer product. Perhaps if there is sufficient interest a bunch of us could develop our own opensource chartplotter software. i note that HP is now shipping a laptop with SuSE 9.x INSTALLED FROM THE FACTORY so you don't have to wait for it to "turn up on your laptop" -mo |
On Fri, 27 Aug 2004 21:26:40 +0200, "Meindert Sprang"
wrote: "Wayne.B" wrote in message .. . I agree with everything you said. Still, some minor quibbles. On Fri, 27 Aug 2004 16:42:29 +0200, "Meindert Sprang" And because it's a whole new learning curve to climb, not the most user friendly system in the world Mmm... ever tried to install the lates SuSE? Almost like windows... But it's not Windows, is it? What is the compelling reason to change? Other than frustration with Microsoft, which I share, but is not a big issue for most people. New mail client, new browser, new newsreader, new imaging software for your digicam, new word processor. Somewhat better ones, in some cases, but not compellingly better. and there's not much help available in the world outside of technology shops. This is really amusing. Have you ever tried to get help for a windows related problem? Most computers are sold with XP OEM, where the dealer is supposed to support you. Most dealers only have the knowledge to tell you how to reinstall in case of a "dark" problem. Call microsoft and you have to draw your plastic first. Yup. So you go to a windows related newsgroup and either get a fix or learn you have to live with it. Not particularly comforting, but at least it's unambiguous. More on this later. Now in case of Linux, your just post your question in a linux related newsgroup and within the hour you have a dozen suggestions how to solve your problem. For free! Hehe, I was a UNIX internals guy (mostly SVID4) back in the 80s. The saying then was that if you had a problem you needed to solve on your UNIX system and couldn't think of a dozen *different* ways to solve it, you didn't really know UNIX. I believed it then and it sounds as if it is true still. The problem is, this will not be perceived as a benefit by the average user. It is a fine example of ambiguity, and most people aren't comfortable with ambiguity. Also, of those dozen fixes, how many will be things that the ordinary user is comfortable doing? Finally, and I know this sounds insane, most computer users I know don't read or even know about newsgroups. All that, plus the lack of a standardized graphical user interface, means that its going to be a while before Linux shows up on our laptops. For eons, long before the conception of a windows-like thing on a PC there was X-windows for unix. And it's still there. Standard. The only thing that varies amongst installations is the window manager, responsible for the look and feel. But every linux distribution comes with the same set of window managers, of which KDE seems to be the most popular and the most windows-loolalike. How do you mean, there's no standard? All true. Windows GUI is a pretty clunky interface and it's not hard to beat or equal. I have more of an issue with the design and usability variations of individual utilities and programs. This is fast gaining attention in the open source community as a crfitical issue. Meindert I want a viable alternative (linux would do) for Windows as much as the next guy. Competition is a Goode Thing. For servers, we have one. For corporate desktop users, we are very close, if only because there is the ability to mandate the users' standard platform. For Joe Homeuser, not close at all, because there is no compelling reason to change. When we start to get significant trickle-down of corporate users opting for a linux system at home to match their office systems, then we start to make headway. All in my ever so humble opinion, of course. Glen PS Where are the Mac users in this thread? They should be foaming at the mouth by now... __________________________________________________ __________ Glen "Wiley" Wilson usenet1 SPAMNIX at worldwidewiley dot com To reply, lose the capitals and do the obvious. Take a look at cpRepeater, my NMEA data integrator, repeater, and logger at http://www.worldwidewiley.com/ |
"Glen "Wiley" Wilson" wrote in
message ... PS Where are the Mac users in this thread? They should be foaming at the mouth by now... Why? OS X is just a slick interface on top of a rewritten unix (BSD, I believe). So they are already the happiest people in the world ;-) And on top of that, there is already decent nav software available for the Mac. Meindert |
On Fri, 27 Aug 2004 22:54:55 +0200, "Meindert Sprang"
wrote: "Glen "Wiley" Wilson" wrote in message ... PS Where are the Mac users in this thread? They should be foaming at the mouth by now... Why? OS X is just a slick interface on top of a rewritten unix (BSD, I believe). So they are already the happiest people in the world ;-) And on top of that, there is already decent nav software available for the Mac. Meindert Well, if I didn't get them started you just did. :-) It's not about the technology, *It's About The Vision!* __________________________________________________ __________ Glen "Wiley" Wilson usenet1 SPAMNIX at worldwidewiley dot com To reply, lose the capitals and do the obvious. Take a look at cpRepeater, my NMEA data integrator, repeater, and logger at http://www.worldwidewiley.com/ |
"Glen "Wiley" Wilson" wrote in
message ... Well, if I didn't get them started you just did. :-) It's not about the technology, *It's About The Vision!* Wow, do I hear Bill Gates talking ? :-)) Meindert |
On Sat, 28 Aug 2004 00:12:34 +0200, "Meindert Sprang"
wrote: Wow, do I hear Bill Gates talking ? :-)) Meindert Now *that's* funny. What is it the lawyers say? Something like "When the facts are against you, argue the law. When the law is against you, argue the facts. When the law and the facts are against you, shout, and pound on the table." There should be a marketing version: "When you're behind on technology, talk about your vision. When you lack vision, trot out the speeds and feeds. When you lack technology and nobody buys into your vision, sue." Glen The above is copyright 2004 Glen Wilson and is released to the public under the terms of the GNU Public License. __________________________________________________ __________ Glen "Wiley" Wilson usenet1 SPAMNIX at worldwidewiley dot com To reply, lose the capitals and do the obvious. Take a look at cpRepeater, my NMEA data integrator, repeater, and logger at http://www.worldwidewiley.com/ |
In article ,
"Meindert Sprang" wrote: Why? OS X is just a slick interface on top of a rewritten unix (BSD, I believe). So they are already the happiest people in the world ;-) And on top of that, there is already decent nav software available for the Mac. Meindert I've been waiting for someone to post the above......been a MacOS fan since Version 1.0 Me |
"Me" wrote in message
... In article , "Meindert Sprang" wrote: Why? OS X is just a slick interface on top of a rewritten unix (BSD, I believe). So they are already the happiest people in the world ;-) And on top of that, there is already decent nav software available for the Mac. Meindert I've been waiting for someone to post the above......been a MacOS fan since Version 1.0 Ok, have a go at me..... :-) Meindert |
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"BillP" wrote in message news:wv_Xc.3410$Rk.2365@trndny03...
Why don't you come out with a Linux version like the rest of the people in this thread want? Many people buy a dedicated chartplotter just because a windows based system is too risky for them. That's another group of potential customers for a linux package. One could even sell it pre-installed on a nice small 12V computer, with the entire thing on a flash disk (solid state). This would still allow you to run other apps as well. By nature, windows is very unsuitable to be installed on a flash disk because is writes so many temporary files on many places. This will wear out a flash disk very soon. Linux on the other hand, is very well organized with all temporary files on one specific place. Allocate a ramdisk for that and your linux system will run for ages on a flash disk. Meindert |
On 2004-08-27 16:31:47 +1000, "Meindert Sprang"
said: "NIFFOCBT" wrote in message ... Can you integrate several Sensors?. Of course he can; with our multiplexers :-) The type of plotter they use can sink and swim someone if it is not done right. If a plotter is not set up correctly or fails at a crucial moment then whats the use. You dont use a plotter on a nice sunny day. You use it when you are lost, tired, or in bad weather. Triggered by the above remark I wonder why no company has yet written a decent navigation package running on Linux. I know this will stir up something, but I have been on a ship, developing software to control a KVM switch that knitted 12 LCD's and 10 computers together. All computers were running XP (!) except the one I installed for controlling the KVM switch. This one ran linux and did the routing to four selectable internet connections as well. Many of these computers had the occasional crash, but the only one that kept on running was the Linux box. Meindert www.shipmodul.com Well at the risk of stiring things up more... We allready have a major unix based desktop that has very good reliability and lots of applications software. It's called MacOS X. BSD based it is really very good and very reliable. The major problem with charting software for me is that all the packages I've looked at for the Mac have support for BSB charts. This is great for NA and Europe but utterly useless for Australia. ARCS and S57 are the way to go for the future as this is where 'official' data will come from (hydro offices). Before anyone tries to convince me that there are BSB formated charts for Australia I suggest you really look at the issue. There are none that are usefull. This has been confirmed through several charting software developers. Charting software is useless without charts! The major commercial packages that support C-Map are a possibility as both C-Map and Navonics have data sets that cover Australia. Just my 2 cents worth. -- Regards, John Proctor VK3JP, VKV6789 S/V Chagall |
On Sat, 28 Aug 2004 21:39:39 GMT, John Proctor
wrote: The major problem with charting software for me is that all the packages I've looked at for the Mac have support for BSB charts. This is great for NA and Europe but utterly useless for Australia. ARCS and S57 are the way to go for the future as this is where 'official' data will come from (hydro offices). Before anyone tries to convince me that there are BSB formated charts for Australia I suggest you really look at the issue. There are none that are usefull. This has been confirmed through several charting software developers. Charting software is useless without charts! Concur, though I'd like a package that supports BSB as well as ARCS and S57 ENCs. The next PC chart software I buy will support those formats, period. The next chartplotter I buy will allow me to upload my ARCS and S57s instead of buying proprietary chips, period. But I'm not holding my breath... __________________________________________________ __________ Glen "Wiley" Wilson usenet1 SPAMNIX at world wide wiley dot com To reply, lose the capitals and do the obvious. Take a look at cpRepeater, my NMEA data integrator, repeater, and logger at http://www.worldwidewiley.com/ |
"Meindert Sprang" wrote in message ... Triggered by the above remark I wonder why no company has yet written a decent navigation package running on Linux. http://freshmeat.net/projects/hugo/ Not being a linux user I cannot comment on whether decent or not. |
"saltair" wrote in message
news:l9wYc.262306$J06.191199@pd7tw2no... "Meindert Sprang" wrote in message ... Triggered by the above remark I wonder why no company has yet written a decent navigation package running on Linux. http://freshmeat.net/projects/hugo/ Not being a linux user I cannot comment on whether decent or not. As far as I know, this software only shows where you are. No routes/waypoints. No autopilot control. Meindert |
Meindert Sprang wrote:
As far as I know, this software only shows where you are. No routes/waypoints. No autopilot control. Are there nav packages that control autopilots? All the autopilots I've seen had their own processors and processed a magnetic heading input. Jack -- Jack Erbes in Ellsworth, Maine, USA - jacker at midmaine dot com |
Are there nav packages that control autopilots? All the autopilots I've
seen had their own processors and processed a magnetic heading input. Yes, almost all of them accept a lat/lon route, waypoint, xte, etc. NMEA sentence. Well, they have since about the mid-1990's. It's time to go to a boat show and see all the new things! |
"Jack Erbes" wrote in message
... Meindert Sprang wrote: As far as I know, this software only shows where you are. No routes/waypoints. No autopilot control. Are there nav packages that control autopilots? All the autopilots I've seen had their own processors and processed a magnetic heading input. If your nav package only receives a position and heading from the GPS and this nav package maintains a route, it can calculate the cross track error (XTE) and send that info to an autopilot. Meindert |
"Meindert Sprang" wrote:
"saltair" wrote in message news:l9wYc.262306$J06.191199@pd7tw2no... "Meindert Sprang" wrote in message ... Triggered by the above remark I wonder why no company has yet written a decent navigation package running on Linux. http://freshmeat.net/projects/hugo/ Not being a linux user I cannot comment on whether decent or not. As far as I know, this software only shows where you are. No routes/waypoints. No autopilot control. GpsDrive has some waypoints features as well: http://www.ganter.at/software/features.shtml I am not a linux user either though.. :) Regards, j. |
Meindert Sprang wrote:
snip Are there nav packages that control autopilots? All the autopilots I've seen had their own processors and processed a magnetic heading input. If your nav package only receives a position and heading from the GPS and this nav package maintains a route, it can calculate the cross track error (XTE) and send that info to an autopilot. That is sort of what I meant or was thinking. The autopilot processes the NMEA inputs from the heading sensor, GPS, and nav package and then does the steering. I thought the implication was that there were nav packages that actually processed the data and steered the boat. Jack -- Jack Erbes in Ellsworth, Maine, USA - jacker at midmaine dot com |
"Jack Erbes" wrote in message
... Meindert Sprang wrote: snip Are there nav packages that control autopilots? All the autopilots I've seen had their own processors and processed a magnetic heading input. If your nav package only receives a position and heading from the GPS and this nav package maintains a route, it can calculate the cross track error (XTE) and send that info to an autopilot. That is sort of what I meant or was thinking. The autopilot processes the NMEA inputs from the heading sensor, GPS, and nav package and then does the steering. That is not what I said. In my example, the only thing the autopilot sees is the XTE. I thought the implication was that there were nav packages that actually processed the data and steered the boat. Precisely. Imagine the following: the GPS only delivers the actual position to your nav program. The nav program knows the waypoints of your route, they are entered in the nav program, not in the GPS. So the nav program knows the straight line between two current waypoints and calculates the error from this line based on the current position from the GPS. This error is sent as an XTE sentence to the autopilot which does nothing more that to steer until the received XTE from the nav program is 0. So in this case the only one doing the calculations and the processing, is the nav program. The XTE to the autopilot is just an error signal in a control loop. The autopilot does it's calculations to mimize the XTE while the nav program does the calculations to derive the error from the current track. Meindert |
Meindert,
Not necessarly true for all gps and autopilots. My Garmin GPS48 stores waypoints and routes. It outputs, among other sentences, RMB and RMC. These two sentences provide the following information. XTE, Direction to steer (L or R), Orgin Waypoint Destination Waypoint Destination Waypoint Latitude Destination Waypoint Longitude Range to Destination Waypoint(nm), Bearing to Destination Waypoint (T), Velocity Towards Destination Waypoint(kn) Time of fix Receiver warning (A=valid, V=warning) Fix Latitude Fix Longitude Speed Over Ground (SOG) Course Made Good Date of fix Magnetic Variation My Raymarine ST4000+ autopilot can receive and decode both sentences when the GPS NMEA output is connected to the autopilot and put in the auto/track mode. It displays Destination Waypoint number (name), XTE, Bearing to Waypoint (BTW), Distance to waypoint, Course over Ground (COG), SOG, Heading, UTC, and Average Speed. For automatic track acquisition, the autopilot needs both XTE and BTW. The autopilot will steer with just XTE provided but you must be within 0.1 nm of desired track and 5 degrees of the bearing to next waypoint when engaging auto mode. I use the COG, SOG and Heading to determine set and drift. Even though I have two GPS receivers and a laptop with Visual Navigation Suite, I plot everything on paper charts and keep my DR figures handy. krj Meindert Sprang wrote: "Jack Erbes" wrote in message ... Meindert Sprang wrote: snip Are there nav packages that control autopilots? All the autopilots I've seen had their own processors and processed a magnetic heading input. If your nav package only receives a position and heading from the GPS and this nav package maintains a route, it can calculate the cross track error (XTE) and send that info to an autopilot. That is sort of what I meant or was thinking. The autopilot processes the NMEA inputs from the heading sensor, GPS, and nav package and then does the steering. That is not what I said. In my example, the only thing the autopilot sees is the XTE. I thought the implication was that there were nav packages that actually processed the data and steered the boat. Precisely. Imagine the following: the GPS only delivers the actual position to your nav program. The nav program knows the waypoints of your route, they are entered in the nav program, not in the GPS. So the nav program knows the straight line between two current waypoints and calculates the error from this line based on the current position from the GPS. This error is sent as an XTE sentence to the autopilot which does nothing more that to steer until the received XTE from the nav program is 0. So in this case the only one doing the calculations and the processing, is the nav program. The XTE to the autopilot is just an error signal in a control loop. The autopilot does it's calculations to mimize the XTE while the nav program does the calculations to derive the error from the current track. Meindert |
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