NEW KM8C with sounder

NEW Product in stock now



1 in stock (can be backordered)

This is a brand new product from Onwa Marine.

Featuring the very latest NMEA OneNet, an IP based network data transfer system – it is the future for data transfer. Read about OneNet in our blog. (click button) OneNet, what’s that?

KM-Multi 8C

Latest top of the range 8 inch model from Onwa Marine with a fantastic new 1024 x 768 resolution screen and NMEA2000 data. The KM-8C and its 12 inch sibling, KM-12C, are Onwa’s new flagship chart plotter products. These high end plotters come with a built in 600/1000 Watt sounder/fish-finder and a plastic 600 Watt transducer is supplied as standard. An AIS transceiver or/and an Onwa Radar can be added at any time; it’s plug and play to do in both cases. For the radar, all the controls for the radar antenna and the dedicated radar screens are already built into the KM-plotter. Once the radar signal is present, the KM-plotter becomes a fully fledged radar set with the choice of a conventional radar screen or have the radar trace overlaid onto the chart. Overlaid makes sense of all those mysterious wisps of radar trace when they are overlaid onto the chart itself.

A new feature to Onwa plotters is the move to NMEA2000 as a data transfer method whilst still  retaining NMEA0183 functionality so as to be compatible with other 0183 equipment. Not content to move just from NMEA0183 to embrace NMEA2000 , the Onwa design team have gone another step forward and introduced the latest NMEA networking protocol, NMEA OneNet as well.

Click the button below for a comprehensive guide to the KM models by Roger Gaspar, a customer of AVES Marine and well-known author of Crossing the Thames Estuary. Roger’s review deals specifically with the KM12X but the operation applies to any KM model.

Instructional video on the KM

Some additional notable features:

1024 x 768 display

NMEA 2000 and 0183 Plus the latest NMEA ONENET

Built-in Radar function (requires Radar antenna) KM displays a dedicated conventional Radar screen and also as the radar trace overlaid onto the chart.


HDMI option (specify when ordering)

Can use K-charts 2 & 3.2, C-Map Max and Navionics +

SD card system updates

Can display gauges (engine etc) camera

600 Watt (dual frequency) or 1000 Watt (choice of frequencies)  Our KM-8C price includes plastic 600 watt dual frequency transducer: bronze version is available as is a 1000 Watt bronze transducer – they can be ordered as an option at additional cost.

For 600 Watt bronze transducer   £46.00

For 1000 Watt bronze transducer £485.00




KM8/12 dimensions



1 in stock (can be backordered)

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