ONWA KP-27A Chartplotter with AIS

Onwa KP-27A Chartplotter/Fishfinder with built in 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 KP27A 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.

KP27-A is the latest AIS equipped 7-inch model from Onwa Marine, release date February 2024. Improvements over earlier models include: a new and faster processor for use with the ever more complex charts now available. Brighter screen (1000 nits) for those bright sunny days and NMEA 2000 data but retaining NMEA0183 for compatibility with 0183 equipment. KP-27A has a 24 month warranty  All warranty and technical support is UK based.

Built-in HD Fishfinder 

Dual Freqeuncy: 50 and 200kHz (alternately transmitted)
Automatic Range and Gain adjustment depending on usage (Cruising or Fishing)
Excellent Sea-bed Discrimination and easily identify fishes and schools of fish

Exact depth to where the school of fish is shown for ease of fishing

Built-in AIS Features ( For KP-25/27/29 A,X Models )

SOTDMA Technology -Same technology used by Class A -Guaranteed time slot allocation
5W Transmission Power– increases the range and AlS Satellite reception enabling Global tracking
Increased Transmission Rate (Based on speed)
exactTrax™: exactTrax Tracking

FEATURES

• 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
• Charts: Compatible with Onwa K-chart V2 and 3.2, Navionics +, C-map Max
• Celestial: Sunrise, Sunset, Moonrise

Charts: Comes with 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 max chart

K-chart3.2 River Medway, England
Aerials: 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.

Download Brochure Here