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Cactus Fishing

Vesper Marine WMX850 Watchmate And Class B Transponder + FREE Antenna Splitter

Manufacturers Part Number: WMX850

(£799.96 Inc VAT)

(£639.95 Inc VAT)

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Vesper Marine WMX850 Watchmate And Class B Transponder

  • Designed especially for highest AIS performance and lowest power consumption compared to other products.
  • Winner of two international innovation awards.
  • Nominated for the prestigious 2010 DAME Award.

The AISWatchMate 850 Transponder incorporates a built-in GPS receiver and patch antenna with the award winning AISWatchMate collision avoidance display.
Using the Universal Shipborne Automatic Identification System (AIS) the AISWatchMate 850 Transponder transmits your AIS data and displays data from all AIS equipped vessels in your vicinity. Audible warning alarms are sounded if a potentially dangerous situation exists. The alarm sounds whenever a ship is detected that will come dangerously close even though the ship may still be many miles away. You are alerted immediately with the closest point of approach (CPA) and the time until CPA.
Unique and customisable alarm and intelligent filter settings help to eliminate false alarms. Ships and alarms are displayed in a prioritised order assisting you to safely navigate in crowded shipping areas.
The AISWatchMate 850 Transponder has a built-in Class B AIS transponder with GPS receiver and GPS patch antenna. It can be interfaced to other on-board electronics and will provide full AIS output. However, it can be used completely stand-alone and it is not necessary to connect it to any other device.


Integrated AIS Transponder
Includes a built-in AIS Transponder with two channel parallel receiver and transmitter. This high performance transponder means greater range and increased safety. It also makes installation easier. No external "black boxes" to mount, power and wire. Just plug in a VHF antenna and connect the AISWatchMate 850 Transponder to your 12 or 24 volt power supply.
Ultra-Low power consumption
Designed for minimal power consumption the AISWatchMate 850 Transponder is extremely well suited for energy conscious vessels.
Integrated GPS Antenna
Includes a built-in GPS patch antenna that provides GPS data to the integrated 50 channel GPS receiver. This internal patch antenna allows for simple installation. However if needed, an external GPS antenna connection is provided and an optional external antenna is available.
For best performance, the built-in GPS antenna requires a clear and unobstructed view of the sky. It usually works well when installed in a cockpit, under a non-metallic dodger or under a fiberglass hard-top. However, if you are mounting the AISWatchMate 850 Transponder in a location which does not provide adequate GPS signal coverage (eg. near or obstructed by metal objects or "down below" at a nav station), we recommend using our external GPS antenna.
Fully Water Proof Including USB Connection
The water proof USB connection can be used to connect to the AISWatchMate 850 Transponder during configuration and makes for an easy connection to onboard or home computers if required.

Anchor Watch

This feature enables you to mark where you dropped anchor and sounds an alarm if your vessel moves outside a preset circle.
The Anchor Watch feature is also available for the AISWatchMate 750 Receiver and 670 Display. Sorry this feature is not available for the older AISWatchMate 650 Display.
Direct Selective Calling (DSC)
Using the DSC function from your WatchMate allows you to initiate an “individual station call” to vessels that are displayed on your WatchMate screen. This feature makes it easy to message nearby boats, requesting them to switch to a specific channel for a VHF call.
The perfect companion for AIS Search and Rescue and Man Over Board devices, including the latest models. Sounds the alarm whenever an AIS-SART or AIS-MOB is triggered. Clearly identifies them on the display and provides continuous position updates as well as bearing and range to the SART or MOB.
Target Plot
Provides a radar-like display of all vessels within the selected range. The display can be oriented north-up or heading-up so it's very easy and natural to interpret. Dangerous and lost targets are readily identified.
Graphical Plot Shows Crossing Situations
Shows the relative position of a target vs. your vessel at the closest point of approach. This provides a graphical view of the crossing situation and clearly indicates whether a target will pass ahead or behind.
Computes the closest point of approach and time until CPA. Alarms may be based on these and other factors.
Bearing and Range
Computes the bearing and range to each vessel. Bearing can be displayed in magnetic to facilitate easy visual identification using your compass and binoculars. Bearings can alternatively be displayed in true or relative to your vessel's heading.
Vessels and alarms are presented in priority order.
Intelligent Filtering
In crowded operating areas the AISWatchMate 850 Transponder eliminates clutter and false alarms with sophisticated filtering options.
Identify your "fleet"

Targets marked as members of your fleet are displayed with a special icon. Use this to indicate your friends or vessels you commonly work with.
CPA alarm
Triggers alarm if a vessel will come too close. Full control of alarm parameters.
Guard alarm
Sounds alarm if any vessel comes within the specified range. Both CPA alarms and guard alarms may be used together.
External alarm trigger
In addition to the internal alarm, an external buzzer, alarm, or signal light can be interfaced without requiring any additional relays (max 150mA).
Consise and easy to read displays
Uncluttered easy to read display shows all available AIS data.
Class A, Class B and AIS-SART (MOB)
Displays AIS data received from all Class A and Class B transponders. Displays and triggers the alarm for AIS-SART (Search and Rescue Transponders) and personal AIS-MOB transponders.
Safety messages
Displays received AIS Broadcast Safety Messages. These messages may contain important safety, navigation, weather, or shipping information. An AIS mayday safety message can also be sent directly from the AISWatchMate 850 Transponder.
Aids to navigation
Full support for AIS aids to navigation including off-position and virtual aid indicators.
Meteorological and hydrographic display
Displays real-time wind, current, tidal and much more in areas where this information is broadcast.
GPS receiver
Displays built-in GPS satellite status and navigation data such as your position, heading, course and speed.
Large backlit LCD
Adjustable daylight viewable backlit 125mm (5") LCD.
Easy to use
Four buttons control all features. Each button is clearly labeled on-screen. Buttons are backlit for night time use and illumination brightness is controllable. Each setting has on-screen help.

External interface
The AISWatchMate 850 Transponder provides complete AIS and GPS output and is easily interfaced to chart plotters, radars or computers.
Silent Mode
Allows AISWatchMate 850 Transponder to be put in Silent Mode. When in this mode, the AIS receivers and GPS continue to operate normally and all alarms and other features, including the Anchor Watch, are available. The only change is all transmissions are inhibited (except MayDay). Perfect for those times when you want privacy.
VHF "in use" Indicator
Unique VHF “in use” indicator (When used with Vesper Marine’s VHF splitter).
Self Diagnosis
Self diagnosis to provide warnings if AIS, GPS or antenna are not functioning.

Vesper Marine WMX850 Connection Diagram

What's In The Box

  • Protective cover
  • Installation guide
  • Mounting bracket with thumbscrews
  • Flush mounting template
  • 2m (6.5') Power/data cable
  • 1m (3') USB cable
  • Flush mounting seal and screws
Size*208mm wide x 135mm high x 76mm depth (8 3/16” x 5 5/16” x 3”)
LCD panel125mm (5") grayscale sunlight viewable 320x240
LCD light level Off and multiple levels of brightness
EnvironmentalWaterproof (IP67: submersible to 1m for 30 mins)
Operating temperature-25°C to +55°C (-13°F to 131°F)
Power supply10-32 VDC, 3W nominal (Power Save Mode = 210mA @ 12V)
Number of receivers2 AIS (parallel), 1 DSC (timeshared)
Receive sensitivity -113 dBm (<20% PER)
Number of transmitters1 AIS
Transmit power output33 dBm (2 watts)
GPSBuilt-in 50 channel GPS receiver with SBAS (satellite based augmentation systems such as WAAS & EGNOS), selectable smoothing, internal antenna, TNC for optional external antenna
GPS sensitivity-159dBm tracking & navigation
-142dBm acquisition (cold start)
GPS accuracyPosition 2.5m CEP, SBAS 2.0m CEP
External alarm maximum150 mA (power supply voltage)
VHF antenna required50 ohm, 156-162MHz, max 2:1 VSWR, PL-259 connector.
Serial data1 isolated USB port (mini), 1 isolated NMEA input (RS422 4800/38400 baud), 1NMEA output (RS422 4800/38400 baud)
AIS MessagesDisplays all class A and class B position reports, voyage data, static data, aids to navigation, SAR aircraft, SART, MOB, meteorological/hydrographic and safety messages
ProtocolsIEC 61162-1, NMEA 0183, NMEA 0183 HS
StandardsIEC 62287, IEC 60945, IEC 61108, IEC 61162, ITU-R M.1371, ITU-R M.825, ITU-R M.1084
ApprovalsBSH, BABT, CE, US Coast Guard, US FCC, Transport Canada, IC

* Size does not include bracket or cable


Specifications may change due to product improvements and different product release versions.

Please note as this item is manufactured outside the EU it is liable for import duty if it is not installed on a sea going vessel, commercial or leisure. You must confirm to us within 3 months of purchase that the unit has been installed and supply details of the name of vessel, type of vessel, date and person who install the equipment otherwise we will raise an invoice for the import duty which is currently 3.8%
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This product was added to our catalog on Tuesday 05 February, 2013.
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