AIS with high performance and maximum reliability!

The B953 is a high transmit power (5W SOTDMA) AIS Class B transceiver that is small, light-weight, yet delivers the very best AIS receive and transmit performance so you see more AIS information and targets at maximum range – all achieved with the least power consumption.

The B953 has an integrated VHF antenna splitter which enables the transceiver to share your existing VHF antenna without any loss of performance. With built in intelligent connectivity, integrated next generation GPS receiver & antenna and a unique FLEXI-FIT bracket system, safe and secure installation is simple.

Certified AIS Class B – 5W SOTDMA

Integrated high performance zero loss VHF antenna splitter

Global Certification – USCG / FCC / Canada / Europe

FLEXI-FIT™ bracket system for easy, convenient and secure installation
Integrated high-performance GPS receiver and antenna (external antenna)

Water, pressure spray and damp proof – IPx6 & IPx7

Protected from vibration, shock and extreme temperatures

Small and lightweight

Ultra-low power consumption – best in class

Guaranteed connectivity and interoperability with any app, chart plotter, smart phone, tablet or PC
NMEA0183 & NMEA2000

Automated health and performance monitoring

Silent Mode (transmit-off) function

Enhanced RF screening to protect against electromagnetic interference

Built-in power surge protection

Technical Features

PHYSICAL AND ENVIRONMENTAL SPECIFICATIONSize (w x h x d) – 150 x 115 x 45mm
Weight – 415g
Operating temperature – -25°C to +55°C
Storage temperature – -25°C to +70°C
Ingress protection – IPx6 and IPx7
ELECTRICAL SPECIFICATIONSupply voltage – 12V or 24V DC
Supply voltage range – 9.6V – 31.2V DC
Average current (at 12V) – 245mA
Peak current – 2A
Average power consumption (at 12V) – 2.9W
Galvanic isolation – NMEA 0183 inputs only, NMEA 2000, VHF antenna port
CONNECTORSVHF antenna – SO-239
VHF radio – SO-239
GNSS – TNC
Power/NMEA 0183/silent mode – 12 way circular multipole
NMEA 2000 – 5 way Micro-C connector
USB – USB Micro-B
DATA INTERFACESNMEA 0183 – 2 x bi-directional ports
NMEA 2000 – NMEA2000 Ed 3.101, LEN=1
USB – PC virtual com port for NMEA0183 data
STANDARDS COMPLIANCEAIS standards – IEC 62287-1 Ed. 3.  ITU-R M.1371.5
Product safety standards – EN60950-1 2006 +A11:2009 +A1:2010 +A12:2011 +A2:2013 EN62311:2008
Environmental standards – IEC 60945 Ed. 4
Serial data interface standards – IEC 61162-1 Ed 5.0.  IEC 61162-2 Ed 1.0
NMEA 2000 – NMEA 2000 Ed 3.101
GNSS performance standards – IEC 61108-1 Ed 2.0. IEC 61108-02 Ed 1.0
GNSSSystems supported – GPS, GLONASS, BeiDou, Galileo
(two of any combination, three including GPS, Galileo)
Channels – 72
Internal/external antenna – Internal or optional external antenna
Time to first fix from cold start – 26s
VHF TRANSCEIVERVDL access scheme – CSTDMA
Operating frequency – 156.025MHz – 162.025MHz
Channel bandwidth – 25kHz
Receivers/transmitters – 2 x receivers, 1 x transmitter
AIS receiver sensitivity (20% PER) – -111dBm
AIS transmitter power – 5W (+37dBm)
USER INTERFACEIndicators – Power, transmit timeout, error, silent mode