Joe’s correct, you can have more than one p70/p70R control head on a SeaTalkNG 
network.  In answer to Dave’s other questions:

1.  Yes, you can mount another controller at the companionway, but you’ll still 
need to go to the helm to disengage the drive.
2.  Using RayControl on an iPad requires having a Raymarine WiFi MFD.
3.  The ONLY ways to have proper external control of a Raymarine plotter are 
either through a Raymarine plotter (or an iOS device on that plotter’s WiFi), 
or through a wireless remote like the S100.  There are no other provisions to 
control from third-party devices.
4.  The S100 wireless controller would be an option; but it uses the older 
SeaTalk1, so you’ll need to purchase and install a SeaTalk1 to SeaTalkNG 
converter kit, along with the S100.  Cost-wise, by the time you do that, it’s 
about a wash with buying another p70; but you get the advantage of mobility 
with your controller (as long as the batteries are fresh…).

— Fred

Fred Street -- Minneapolis
S/V Oceanis (1979 C&C Landfall 38) -- Bayfield, WI

> On Sep 1, 2016, at 6:11 AM, Della Barba, Joe via CnC-List 
> <[email protected]> wrote:
> 
> AFAIK you can have multiple P70 control heads. Fred can jump in, there are 
> also wired and wireless remote controls around. I don’t know which ones work 
> with the EV 100 offhand. I have the old Autohelm 4000 and have a remote on 
> 15-20 feet of wire that is very nice J
> Joe
> Coquina
>  
> From: CnC-List [mailto:[email protected] 
> <mailto:[email protected]>] On Behalf Of Syerdave--- via CnC-List
> Sent: Thursday, September 01, 2016 7:04 AM
> To: C&c Stus List
> Cc: [email protected] <mailto:[email protected]>
> Subject: Re: Stus-List EV 100 autopilot
>  
> Another timely discussion....
> 
> 
> I have had two seasons with the ev100, with the P70 control head mounted both 
> on the cockpit bulkhead beside the helm (season one) and then moved to a pod 
> at the pedestal.  Seatalkng/n2k backbone throughout.  I currently use an iPad 
> as a chart plotter on and off a ram mount on the pedestal, so no integrated 
> chart plotter, And have the i70 multifunction display beside the 
> companionway.   Seatalkng/n2k backbone throughout.   
> 
> 
> Initially, I was debating autopilot location between the companionway and 
> helm.      
> Consistent with others' posts, After a season's use, primarily Because it is 
> necessary to disengage the ev100 wheel-drive clutch manually steer anyway, I 
> found that having the p70 at the helm is essential, and most convenient.  
> (Wind shifts, avoiding collisions, furling sails) 
> However, when single handing, I too like to sit in the companionway and would 
> like to tweak the course from there.   so while I think that with the 
> clutch-at-wheel of the ev100, control at the helm is necessary, it would be 
> ideal to have a second control location at the companionway.   Long answer to 
> a short question but it sets up mine, in the same vein.
>  
> If I do not wish to buy a dedicated ray marine chart plotter, what do folks 
> think is the best way to duplicate the autopilot controls at both the helm 
> and companionway?  Can you run 2 p70s?  Can the ev100 autopilot be controlled 
> via an app without the Ray chart plotter's wifi?  Can a tablet-based chart 
> plotter integrate with and control the ev-100?  
>  
> Thanks!  Dave

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