KA-GC9A 9-Axis Heading Sensor RS422 version

Onwa KA-GC9A Heading Sensor

This is the device that produces the information to drive an electronic compass or an auto pilot and can be set to refresh 1, 5 or 10 times per second. This is needed if you want accurate target tracking (MARPA) on your radar, best radar overlay and true course heading on your chart plotter. It looks like a conventional GPS antenna, and in one respect it is similar in that it uses satellites for GPS, but inside its IP67 case there is a very sophisticate device that can calculate SOG, COG, position and heading, pitch, roll and yaw and it does all of these rather well. From switch on, it gets a heading in just a few seconds. Easy as a GPS antenna to install – it has a direction arrow on the case –Install on a horizontal centre line of the boat and align the arrow the centre of the bow and it’s ready to go. It is configurable in many ways using an Onwa free APP but you won’t need to as it will come pre-configured if you describe with your order what other equipment you intend to use it with and how you intend to use it. For example, if you buy an Onwa auto pilot, a KA-GC9A comes in the pilot box pre-configured at the factory and set at a refresh rate of 10 times per second. Older auto pilots used a fluxgate compass for position and heading sensing, but modern up to date auto pilots from all manufacturers use a 9 axis sensor device exactly similar to the KA-GC9A although they are usually very much more costly. KA-GC9A can operate from 5 volt to 32 volt  and has over voltage and reverse polarity protection. Cable length is 9 metres but can be extended. As this device uses RS422, a balanced noise cancelling data system, the distance can be quite long – 4000 feet at low data rates which should be more than enough for most leisure boats!

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