AVES MARINE Ltd                        Authorised and approved by Onwa Marine Ltd                                UK and EU sales and support 


         ONWA AIS* equipped chart plotters.    


* AIS; what's that?......find out by clicking here                    

Now..... New higher power Class B+ AIS module installed in all models

All Onwa AIS equipped chart plotters now have the new higher specification version Class B+ installed as standard as a free upgrade from the Class B system we are all used to.

Think of Class B+ as a step between the commercial Class A and the leisure Class B systems.

Class B is transmitted at 2 watts, Class A at 12.5watts and Class B+ at 5 watts. Class B+ has the following advantages over Class B:

Extended transmission range, Class B+ transmits at over twice the power of Class B

Your vessel information transmitted up to every 5 seconds (Class B = every 30 seconds). For anyone using a high speed craft this is quite important. 

SOTDMA technology - same technology as Class A - has guaranteed time slot allocation. Class B  has to wait for an empty space to be allocated by the AIS system. In crowded AIS areas this means possible delays in Class B sending out data.

.All these models can use C-Map Max charts, Navionics Plus charts and Onwa's own K-charts. K charts are free to buyers. All these plotters are completely self contained units consisting of a sophisticated multi-function chart plotter with a built in Class B AIS transceiver (some are available as Class B+). One model (K7A) even has an echo sounder/fish finder as well.

Onwa's standard warranty of 18 months parts and service

K-chart2 and K-chart 3 supplied free with every plotter, usually the UK and Ireland chart although these enlarged versions that we supply cover a vast area from Iceland in the North to Spain in the South and almost to The Baltic in the East, Any area of the world can be substituted or as an addition.

Onwa AIS plotters 

A brand new 12" screen with Radar function.

New KP1299X 12.1" plotter with Class B+ AIS transceiver, Fish-finder/Sounder and ability to connect to Onwa KR1006 36nm 4Kw X band Radome. Plotter then becomes a radar screen. KR1006 can also be connected via Wi-Fi and a router to a tablet or PC so that the tablet/PC becomes a second screen and controller. Perfect for 1299X on deck and the tablet/PC below at the chart table. 1299X available February 2020 cost £1099 +VAT. Freight £10.00 to most of UK (£16.00 to Highlands).

Radome.. expected to be in the region £1200 + VAT + Freight at cost

NOTE..... Radar display can be overlaid onto the chart screen - perfect for those of us who want a clear and easy way to interpret the radar targets.

Important news 18/3/20

I have just received first shipment of this model and all sold out straight away. This is a fantastic piece of kit - there is nothing like it on the market. Onwa tell me that they cannot meet the outstanding orders that they have for this model for roughly two months. I have placed an order for a quantity of 1299X to be supplied as soon as they are available. if you would like to be amongst the first to own a 1299X call me and I will reserve one for you.

NEW model KP1299X

                                                                                                                                                                       0 cm Radome for 1299X, 4Kw 36nm + Wi-Fi connectivity to a Tablet or PC

7 inch models: 

KP39A  £475.00

Freight £6.99 to UK, please message for other areas. 

This 7" widescreen (16x9) format sunlight viewable screen is a new addition to the Onwa range at a price that really makes a smart new plotter with AIS on your boat affordable at little more than the cost of an AIS Black Box. 

Glomex RA111 AIS aerial with low loss RG8X cable and terminated connectors at both ends and a mounting bracket can be included for an additional £70.00

Note. There is a smaller 5" version of this plotter (KP-38A) if space is at a premium that we can order in for you. It is slightly cheaper but do bear in mind that at just 5 inches you do need the screen quite close by unless your eyesight is absolutely top line. 



KP-39A 7" 

KP39A is also available with an enhanced super sensitive KSA6 mk2 AIS unit - this version AIS is the type fitted as standard in the more expensive K7 and K99 Onwa plotters.

If you like to see more vessel from further away then this might be for you. 

A comparison test between a standard KP39A KSA3 AIS and a KP39A fitted with an enhanced KSA6 version using the same AIS aerial showed:  

KSA3 = 11 targets within 12 miles distance 

KSA6 version = showed 32 at 21 miles distance.  

This version KP39A


Freight £6.99 to UK, please message for other areas. 

Need an AIS aerial - we have Glomex RA111 - see foot of this page for details and options.


KP708A mk2 with Class B+ AIS transceiver

An improved mk2 version with faster speed and functionality, this model has the more conventional 4 x 3 screen format, IP66 water ingress rating and has a less reflective screen than the KP39A - in very bright sunlight this will improve the visibility of the display. If you intend to use your plotter at your helm where the sun can shine directly on it you may want to consider this model over the 39A even though they share a similar screen brightness. If the plotter is sheltered from direct sunlight then it isn't really a consideration. However, on deck you should consider the IP rating - IP66 is appropriate unless the plotter is sheltered. KP708A comes with new version K-chart3 installed. 

Your AIS details set up for you.


KP708A 7"


KP708A+ 7"

£625.00 - comes with:

External KA-07 GPS aerial and mount 

Free Onwa K-chart3 of your choice

Freight £6.99 to UK, please message for other areas. 

Glomex RA111 AIS aerial with 10 metres cable terminated at both ends and a mounting bracket can be included for an additional £70.00

KP708A+ version: £599.00

This is the same as the KP708A but has an internal GPS aerial (cannot use an external GPS). You should only specify the internal aerial if the plotter will have a view of the sky or is installed under a wood or GPS roof. This version (KP708A+) is slightly cheaper.

Freight £6.99 to UK, please message for other areas. 

Wow, this model has everything!

AIS and a dual frequency sounder fish-finder.

K-combo 7A   

This 7" 4 x 3 version is amazing. It not only has the new Class B+ AIS transceiver built in but also a 300 watt nominal, 600 watt max', dual frequency echo sounder/fish finder as well; just about everything you need in one unit. A choice of transom mounted or thru-hull transducer available.  Comes with an external  KA-07 GPS aerial (complete with mount) with 10 metres cable, K-chart3 of your choice. 

£679.00 + Transducer (£99.00)



Glomex RA111 AIS aerial with 10 metres cable terminated at both ends and a mounting bracket can be included for an additional £70.00

Freight £6.99 to UK, please message for other areas. 

99 series models

The 99 series has been around for a few years now and has justly earned a reputation for superb reliability and usability by sailors all over the world. In 2018 Onwa redesigned the 99 as a mk2 version to incorporate faster processors, more memory and other hardware changes; the improvement is quite noticeable. Considerably faster boot up and generally a lot slicker performance. 

KP1299A £999.00

Freight  £10.00 to UK (Highlands of Scotland, £16.00)                                                    

This has a large 12.1" 4 x 3 screen, a built in Class B+ AIS transponder and a low reflectivity screen for improved visibility in bright sunlight. The KP-1299 has always been our best selling product both in AIS and non-AIS versions for customers with the space available to accommodate this model. This is unsurprising as the clarity and readability of that large screen makes it an easy choice.

You should try to see one of these super plotters; the screen image is impressive. If you have the room for a 12 inch screen you should consider one of these plotters - you won't be disappointed. 

AIS aerials and other options.

AIS aerial

To receive and transmit AIS signals you will need to buy a dedicated AIS VHF aerial.

Whilst any Marine Band VHF will work for AIS, you should invest in a dedicated AIS aerial for best performance. Standard VHF aerials are tuned to 156 MHz - around the centre of the marine band and are intended to work reasonably well over the entire marine band. However, the AIS channels exist right at the top of the band at 162MHz. So, for best performance you should have an aerial that is tuned to 162 MHz.

We supply Glomex RA111AIS aerials; a stubby 5" aerial that is both flexible and strong and won't get damaged whilst lines handling etc if mounted low down on a rail. They come with 10 metres of cable terminated at both ends with PL259 connectors and have a mounting bracket that can be screwed to a horizontal surface or cable tied to a pole.


Glomex RA111AIS antenna with 10m RG58 cable and connectors fitted.  £79.0 (only 2 left)

Now stocking a new version - same antenna but with higher quality (extra low loss) RGX8 cable. Cable cut to your specified length and terminated with PL259 connectors at each end. _Note.. one end can be left prepared but unterminated so that cable can be threaded through a 6.5 mm hole - just needs connector to be screwed on to the cable and the centre pin soldered when installation is concluded. Be sure to solder the connection - this is important.  

£73.20 + Cable at £1.20 per metre

Note....RG8X cable has considerably less attenuation compared to the standard RG58 cable usually supplied with these aerials) 

Send a message to make an enquiry or to order. Pay by card or PayPal         

We will be happy to call you back!


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