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I have a fluxgate compass connected to the S3 on My 1995 SeaRay. I also have a second (I think) compass, under the helm seat, that I am not sure where it's connected. Attached is a picture of the unit. Can anyone advise me what type it is?
Welcome to the Raymarine Forum Seeray96,

The device listed within your photo is an ST80 Heading Sensor. The Raymarine Heading Sensor consists of an oil-filled sphere suspended in a custom built “swing bracket”, together with associated electronics.

The Heading Sensor transmits magnetic compass heading data to equipment that is NMEA 0183 compatible, such as radars, RayData displays, and RayPilot autopilot systems
Thanks, Chuck. I'm not getting a heading reading om E120 databar, so I assume this compass is not connected. Looks like I'll have to find the cable end and get it to the mfd.
You're welcome.
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