Seatalk Instruments Magnetic Heading Required

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KAM

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I currently have a set of ST60 instruments speed , depth, wind, multi and a seatalk to nmea converter box. I am looking for the easiest cost effective method to get magnetic heading information onto seatalk. (the PI compass is working but a long way from outputting NMEA) I Also have an analogue fluxgate compass and old black non seatalk Autohelm 2000. Options appear to be to buy an NMEA fluxgate sensor such as the NASA (the digital yacht one is a bit pricey) but the ST60 multi which has a heading chapter does not seem to accept the HDG NMEA sentence produced by the NASA unit. Has anyone tried this.
 
KAM said:
the ST60 multi which has a heading chapter does not seem to accept the HDG NMEA sentence produced by the NASA unit.
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If the ST60 Multi is the same as the ST60 Graphic, it doesn't accept NMEA heading, only Seatalk heading, it will then output NMEA HDM. Are you putting the NASA NMEA through the Raymarine converter?
 
laika said:
Is this because you don't think the (non-tilt-compensated) output isn't accurate enough or is it just an i/o coding problem that needs solving?
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I think its accurate enough just don't have the time to code the NMEA output.
 
earlybird said:
If the ST60 Multi is the same as the ST60 Graphic, it doesn't accept NMEA heading, only Seatalk heading, it will then output NMEA HDM. Are you putting the NASA NMEA through the Raymarine converter?
Click to expand...


Have not decided yet just looking at the options. Not sure if the ST60 multi would see the NMEA HDG if I pass it through the converter.
 
Got more or less the same problem we have a SL 1250 PLOTTER/FISHFINDER, it was getting lat/long from seatalk 120 gps, and heading from st40 fluxgate compass, all into the sea talk port on the SL 1250, however the seatalk gps broke down as they do and we replaced it with a evermore nmea gps which is connected via the nmea wires on the main harness this works fine but no "heading" is being shown, we intend to feed the plotter with a heading from the ST40 direct via the sea talk port, will let you know if we succeed.
 
KAM said:
I think its accurate enough just don't have the time to code the NMEA output.
Click to expand...

Maybe post the code you've got and see if others may be able to augment it? Sounds like too good a project not to use...

Did you get a usb to serial adapter to plug into the nmea to sea talk thingy?
 
Not sure if we are on the same hymn sheet, but today we joined wires from the ST 40 FLUXGATE COMPASS i.e. yellow, to a Seatalk plug/lead yellow, then hooked the red to red and shield to shield, then to power, plugged into the seatalk port on the plotter and we now have a heading reference up on the screen.
 
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