7" KP-27X with AIS Transceiver & Sounder

This model has everything built in - with both Class B+ AIS and sounder/fish-finder. All these features in one small box, how do they manage to do this? Well, years of practice is one answer.

 Whilst the 'big name' manufactures have been producing basic chart plotters, Onwa have been producing plotters with AIS transceivers built-in since 2014. Over the years they have just got better and better and the ultimate result is the X version with not only 5-Watt Class B+ AIS but also with a built in 600-Watt Sonar/Sounder fish-finder.

All Onwa AIS transceivers are the latest Class B+ 5-Watt version with the same SOTDMA technology as Class A commercial vessels although at reduced power (Class A being 12.5 Watts). SOTDMA technology has advantages in performance over the older CSTDMA providing faster access to AIS transmission slots and higher power. If you are researching AIS transmitters you will find that some manufacturers are still offering old Class B CSTDMA transmitters and they will likely be more expensive than Onwa products using the very latest version.

X version has NMEA0183 and NMEA2000. For Wi-Fi add an NMEA to wi-fi converter. See our YakBitz 0183 to wi-Fi converter or our Onwa 0183/2000/wi-fi converter. If you are thinking of using an iPad or phone for Navionics/Garmin Boating App (or similar), message or call as we have lots of experience with this product and lots of satisfied customers using it.

     Click for brochure and specification

•      Click for brochure and specification

  
  

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

X 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

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.

AIS aerial: choice of flexible/stubby or stainless whip. Flexible/stubby is particularly suited for low level mounting where a whip type may be vulnerable to damage by crew or the deployment of lines. Aerials we supply are specifically tuned to 162mHz the frequency ofe two AIS channels and we use low loss RG8X 50-ohm cable which we cut to your specified length. Cable can be supplied with two high quality PL259 connectors fitted or with one only which greatly facilitates installing the cable though tight spaces or a deck fitting. If you choose one end only fitted, the free cable end is prepared using a professional cutting tool so that the second connector can simply be screwed onto the cable and the centre tip soldered. 

Includes Transducer

Beware buying from an unauthorised source. Warranty, if any, may mean returning to China at your expense and incur additional UK VAT on re-import to UK. Products manufactured for sale in Asia may not comply with UK and EU standards and be illegal to use, particularly relevant for an AIS transceiver (transponder) as this transmits your identity.