[C320-list] Sending NEMA 0183 Data from Garmin Charplotter to Raymarine Autopilot

[Angus Henderson]

Thanks Jerry.  The is helpful and gives me another option to try.

Angus
> On Jun 21, 2016, at 12:05 PM, Jerry Brown <jbrown01015 at outlook.com> wrote:
> 
> Hi Angus
> 
> Yes I am.  When I set up hull 1137 with a Garmin chart plotter and Raymarine everything else about 7 or so years ago, I eventually bought the box from Raymarine which was described something like a "interface between Sea Talk and NMEA".  I sold the boat last year so I no longer have the paperwork.  I do not see the box listed on the Raymarine site now though I only had a cursory look.  I endured endless frustration as the paperwork and the Raymarine guys all said no converter was needed.  They were "in error" to put it politely.  After putting it in the interface box (I think it was about $60.00) everything worked, including even the Garmin "auto steer" using the top end map chip which allowed the chartplotter to map a course between two points avoiding all obstacles.  I tried it from one side of a headland to another on lake Ontario and it did exactly what it said on the label, even though I was stood at the helm all the time just in case.  I also for example saw the wind info on the chartplotter as it used the data to correct headings on plotted courses etc.  In practice I just sailed the boat but all the gizmos were hand when motoring single handed and in fog when going really slowly but close to obstacles trying to get home.
> 
> Hope you can sort it out.
> 
> Jerry
> 
> On 2016-06-21 10:00 AM, Angus Henderson wrote:
>> Thanks Jerry.  It looks as though you are pointing me in the direction of the NMEA 0183 Multiplexer?
>> 
>> Angus
>> 
>>> On Jun 21, 2016, at 6:35 AM, Jerry Brown <jbrown01015 at outlook.com> wrote:
>>> 
>>> Have a look at this link
>>> 
>>> http://www.defender.com/category.jsp?path=-1%7C344%7C2028705&id=2028871
>>> 
>>> Jerry Brown.
>>> 
>>> List Lurker - former 320 owner
>>> 
>>> 
>>> On 2016-06-20 9:58 PM, Angus Henderson wrote:
>>>>  On June 14th Joe Tamucci submitted a post with the following title, part of which is reproduced below.
>>>> 
>>>> I also recently purchased a Garmin chart plotter, a 54dv and have been thinking about how to get it talk to the Raymarine Authelm.  Joe refers to his AH unit as an ST-5 control head.  I have a 4000+ and was wondering whether this is the same thing?
>>>> 
>>>> Also, referring to the excerpt below I am struggling to understand what the “Raymarine computer” is?  I am familiar with the control head, the wheel unit and the flux gate compass but not the “computer”.  I would appreciate some help understanding this.
>>>> 
>>>> 
>>>>  3). Although the ST-5 control head has a NEMA input, it cannot be used
>>>>    to input position data.  You must use the NEMA port on the Raymarine
>>>>    computer.  I assumed the control head NEMA 0183 input port would work,
>>>>    and the Raymarine tech agreed with me.  NO!  You must go straight to
>>>>    the computer.
>>>> 
>>>> Thanks
>>>> 
>>>> Angus Henderson
>>>> Hull# 999
>