7″ KP27X AIS + Sounder

Latest 7″ model with everything built in

Class B+ AIS and Sounder/Fish-Finder


Has everything that you need in one unit.
KP-27X has both  Class B+ AIS transceiver and a 600-Watt sounder/Fish-Finder built into one unit, with a new and faster processor for use with the ever more complex charts and a 1000 Nits screen for those bright sunny days. NMEA 2000 data is standard  but retaining NMEA0183 for compatibility with 0183 equipment.

24 month warranty provided by AVES Marine Ltd,
UK Distributor for Onwa Marine Electronics since 2014. All warranty and technical support is UK based.


  • 1000 nits brightness 
  • 800 x 480 screen resolution
  • NMEA2000 data
  • NMEA0183 data
  • Water protection to IP66
  • 12000 User waypoints, 30 routes
  • Worldwide tidal data information calculated from GPS position/Date/Time
  • Alarms: Anchor drag, XTE, arrival, speed, proximity waypoint, voltage
  • Celestial: Sunrise, Sunset, Moonrise
  • Charts: Compatible with Onwa K-chart V2 and 3.2, Navionics + and C-map Max
  • FREE Onwa K-chart for the UK and Ireland (covers Northern France and Holland as well). If you are buying for use in Europe or beyond, Onwa have a chart for your area which can be substituted for the UK chart. Can use Navionics + chart or C-map 

Images of Onwa K-charts       

K-chart3.2 River Medway, England                                    K-chart3.2 Spithead, England

K-chart 3.2 example image Spithead

The AIS section.

All Onwa AIS products have a Class B+ AIS transceiver. Class B+ is the later version of the original Class B two Watt system but having five Watts output and using SOTDMA transmitting technology (Class B is CSTDMA).  SOTDMA is superior to Class B CSTDMA, not only in being higher power, but also in enabling a transmitting vessel to access a transmission slot in the AIS system even in AIS crowded waters. Class B can reserve a slot but if the AIS system is in heavy use the slot is not guaranteed so it may not be able to transmit until a slot is available. SOTDMA also has an advantage in that the transmission is sent more frequently if the speed of the vessel increases which is highly desirable for high-speed craft such as a RIB.

Features of the built-in AIS transceiver

AIS targets overlaid on the chart
Class B+ SOTDMA (same technology as Class A) with guaranteed time slot allocation and transmission rate based on speed.
Receive sensitivity = > -123dBm (2 channels)
Transmit power      = > +36.999 dBm (1 channel) 5 Watts
User adjustable CPA and TCPA alarms (CPA = closest point of approach, TCPA = time to CPA)
Vessel list shows a list of all AIS vessels transmitting within reception distance selecting any one will show other vessel details including: Vessel name, MMSI, Position, COG, SOG, vessel size and its distance away from your own boat. Note that any vessel calculated to be on a collision course and being inside of CPA or TCPA boundaries will trigger an alarm alert on chart screen and also in detail on the AIS screen. AIS target tracking, selecting any vessel enables tracking of that vessel, up to 10 vessels can be selected.

The Sounder section
TX Frequency:              50 and 200kHz (alternately transmitted)
Power Output:              600 Watts
Echo colour:                  16 colours according to echo intensity. Background color selectable from blue, light blue, white and black
Range:                            Meters 5/ 10/ 20/40/80/150/200/ 300/600/1000
Feet:                                15/30/ 60/ 120/200/400/ 600/ 1000/ 2000/3000
Auto Mode:                   Automatic adjustment of range and gain
Display Mode:              High Frequency (200K), Low Frequency (50K), Dual (200K and 50K 1/2 display on each), Zoom (200K and 50K zoom) and A-scope
Interference Rejecter: Rejects unwanted signals by comparing last
and present echoes in strength
Alarm:                             Fish and Bottom alarms. Temperature alarm

GPS. Puck type GPS aerial included, can be used below deck in a GRP boat provided deck material does not attenuate satellite signal unduly.
AIS: an AIS aerial is needed for transmission and reception of AIS
Options: External KA-07 GPS with 10 metres of cable, choice of surface or rail mounts.
Glomex RA111AIS

Click to see Glomex stubby AIS, if Whip aerial required please call

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