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  #1  
Old 02-17-2011
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Sea clear to garmin chartplotter...again

All,

I know this is covered ad nauseum to one extent or another here, but...

Is there an advantage to interfacing my Garmin 441 with my Compaq Presario using SeaTalk rather than just using a gps dongle receiver. And if there is, what exactly do I need to do to accomplish this. I have my dsc vhf hooked up to the Garmin now and it works.

I get lost in the electrobabble I find here so bear with me, please.

Thanx,
Rick Bushie
s/v Anchovy, 1971 C&C 30-1
Pennsville, NJ/Worton, MD
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Old 02-17-2011
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I hate to break it to you but the Garmin doesn't speak SeaTalk, which is a Raymarine proprietary serial protocol. It speaks either NMEA 0183, Garmin, or NMEA 2000--but since it is a 441, I doubt it speaks the N2K.

What are you trying to use the laptop for? Unless there's a specific need to have it connected to the Garmin or the boat's NMEA 0183 setup, then a dongle is the way to go.
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Sorry Dog, I wasn't clear.

I'm running SeaClear II charting software on the laptop. I was hoping to interface with the chartplotter to transfer planned routes to the cockpit and track/log routes on the computer in the cabin.

Rick Bushie
s/v Anchovy, 1971 C&C 30-1
Pennsville, NJ/Worton, MD
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Oh, in that case, yes, by all means connect the computer up to the Garmin. You may need a utility to convert the routes and tracks to a format that the Garmin can read and to download them to the Garmin.
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I take that to mean that it is advantageous to do the interface. Now how about a dumbed down version of how. Or even better, come do it while I'm not looking!

Rick Bushie
s/v Anchovy, 1971 C&C 30-1
Pennsville, NJ/Worton, MD
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Hmm... I don't know if I can dumb it down enough for someone from NJ...

You're probably going to be best off connecting the computer to the second serial port on the Garmin 441.
  1. Connect the Garmin's DATA IN (usually VIOLET for the second port IIRC) to Pin 3 (TxD) on the DB 9
  2. Connect the Garmin's DATA OUT (usually GREY for the second port IIRC) to Pin 2 (RxD) on the DB 9.
  3. Connect Pin 5 (ground) on the DB-9 to the Garmin's 12 VDC ground.
  4. Remember to go into the Serial Port setup and set PORT 2 for NMEA 0183, 38400 baud, 8, N, 1.
That should do it. BTW, on most newer laptops, you're going to need a Windows Qualified Hardware approved USB-to-RS-232 serial port dongle to make this work, since most of the newest laptops have no serial ports.

Quote:
Originally Posted by rickinnj View Post
I take that to mean that it is advantageous to do the interface. Now how about a dumbed down version of how. Or even better, come do it while I'm not looking!

Rick Bushie
s/v Anchovy, 1971 C&C 30-1
Pennsville, NJ/Worton, MD
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You know what the first rule of sailing is? ...Love. You can learn all the math in the 'verse, but you take
a boat to the sea you don't love, she'll shake you off just as sure as the turning of the worlds. Love keeps
her going when she oughta fall down, tells you she's hurting 'fore she keens. Makes her a home.

—Cpt. Mal Reynolds, Serenity (edited)

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Old 02-17-2011
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OK - I have to pipe in here. I have:
  • a stupid Garmin 441, bless it's heart**
  • moving map software - FUGAWI, but that is not an issue

Garmin only talks to itself and I am not sure if it even does that. If it does, I dont think it always listens.

To move a route from FUGAWI to the Garmin 441, here are my steps:
  1. Open FUGAWI (my moving map software)
  2. Choose and open route
  3. Click on "Export" and do it as GPS Exchange format - GPX
  4. A new screen will appear - click OK
  5. Open GPS Utility
  6. Open the saved route (must be GPX format - you will see way points)
  7. Save it as Garmin (Adm) - it will change the name to UserData.ADM
  8. Use card a SD to transfer.

OK - when you do the transfer make sure you specify Merge or you loose all your existing routes and waypoints.

Also - once you reach your maximum number of routes ("You can create and store up to 20 routes, with up to 250 way points each." - page 23 of the manual) it is a good idea to do a "Save to card" - it shows up as just two files but they contain all 20 routes and the appropriate way points. I put these in their own folder on my computer called "Bay of Fundy" and it will be there as "UserData.ADM and UserData.BAK. So, I have a nuimber of little folders for different areas. Each contains two files with those two names, but one contains 20 routes from area A and the next one contains 20 routes from area B etc etc. So, when I go into area B I move those two files onto the SD Card into a folder

Garmin / UserData /
UserData.ADM
UserData.BAK

When you start, you end up moving them one at a time by SD card.

So - if I can help at all - PM me.

** Oh - I learned from my Southern Baptist friends that you can say anything nasty that you want about someone or something as long as you add "Bless her heart" For example - "She sure has put on weight, bless her heart." Hence, my nasty comments about my own Garmin 441.

Shalom

Rik
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First of all, I'm not from Joysee...I just live and work here at the local neighborhood nuclear plant. And B, you're still not talkin english.

Anyway, I went on google and figured out how the pins were numbered on a serial connector. Then I dug out an old serial cable I had laying around from a Garmin 201 watch. The wires are indeed connected to the 2, 3, and 5 pins.

I'm assuming I can splice this cable to the port 2 wiring and go from there. I indeed do not have a serial port... I'll shop for a USB/DB9 adapter.

Rick Bushie
s/v Anchovy, 1971 C&C 30-1
Pennsville, NJ/Worton, MD
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Quote:
Originally Posted by rickinnj View Post
First of all, I'm not from Joysee...I just live and work here at the local neighborhood nuclear plant. And B, you're still not talkin english.
You don't happen to look like this:




Quote:
Anyway, I went on google and figured out how the pins were numbered on a serial connector. Then I dug out an old serial cable I had laying around from a Garmin 201 watch. The wires are indeed connected to the 2, 3, and 5 pins.

I'm assuming I can splice this cable to the port 2 wiring and go from there. I indeed do not have a serial port... I'll shop for a USB/DB9 adapter.

Rick Bushie
s/v Anchovy, 1971 C&C 30-1
Pennsville, NJ/Worton, MD
Yes, you can splice it. Any questions, feel free to PM me.
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You know what the first rule of sailing is? ...Love. You can learn all the math in the 'verse, but you take
a boat to the sea you don't love, she'll shake you off just as sure as the turning of the worlds. Love keeps
her going when she oughta fall down, tells you she's hurting 'fore she keens. Makes her a home.

—Cpt. Mal Reynolds, Serenity (edited)

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Wow! First time I've heard that one! I wish I were Homer... Marge is hot!!!

I do think I've been in Joysee too long, though. I have a Garmin 440, not a 441.

I'll be pulling the 440 out of my Catalina 22 and putting it into Anchovy this weekend. I'd like to get everything functional by her maiden voyage in March.

Rick Bushie
s/v Anchovy, 1971 C&C 30-1
Pennsville, NJ/Worton, MD
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