The T300B-S is a compact and rugged SOTDMA AIS Transponder with built-in Antenna Splitter, designed for the demands of the small commercial boat, fishing boat and leisure markets. It meets the Class ‘B’ (SOTDMA) standard, allowing vessels that are not required to fit Class ‘A’ units to voluntarily fit an AIS Transponder.

When connected to an external VHF antenna and a GPS antenna (not supplied), the T300B-S will transmit its own vessel position and data and receive information from other AIS vessels, shore stations and navigational aids within VHF range.

The built-in Antenna Splitter allows the unit to share a single VHF antenna with a VHF radiotelephone, eliminating the need for a second VHF antenna on the vessel and reducing installation time and cost. Additionally, the unit has an FM radio output for monitoring public service FM radio broadcasts.

The unit is initially programmed by the user with the supplied software over a USB interface. The T300B-S is compatible with a range of computer based navigation programs and chart plotters that accept AIS data sentences over a NMEA 0183 or NMEA 2000 connection.

FEATURES

SOTDMA Transmission Standard
Built-in Antenna Splitter to enable use of VHF Radio and AIS simultaneously
NMEA 0183 and NMEA 2000 compatible
Compact Aluminium Housing
Ideal AIS Receiver for Commercial Boats and Leisure Craft
Automatic Transmission of Vessel’s own position, speed and heading to other vessels within VHF range
A method of monitoring the position, speed and heading of other AIS vessels within VHF range
Ability to plot the progress, changes in heading and speed of other AIS vessels on a PC or Chart Plotter
Transmitter OFF facility to conserve power, or for covert use

APPLICATIONS

Commercial boat, fishing boat and leisure markets
Meets the Class ‘B’ SOTDMA international standard

Technical Specification

Specification	Details
Part Number / SKU	001-1119 (T300B-S)
Model	Comar, T300B-S Class B SOTDMA AIS Transponder with Internal Splitter.
Primary Application	High-Priority Class B+ SOTDMA AIS Transmitting & Receiving with Shared VHF Antenna Management
AIS Standard	IEC 62287-2 Class B SOTDMA (5 W High-Power Class B+)
Frequency Range	156.025 MHz to 162.025 MHz in 25 kHz steps
Transceiver Architecture	1x VHF SOTDMA Transmitter, 2x Parallel VHF Receivers + Integrated VHF Antenna Splitter
Transmit Power	5 W (37 dBm) Class B SOTDMA Standard
Supply Voltage	12 V DC to 24 V DC (9.6 V DC to 31.2 V DC Input Range)
Power Consumption	< 4.5 W nominal; peak transmit up to 2.5 A @ 12 V DC
Data Interfaces	• NMEA 0183: 38,400 baud & 4,800 baud (IEC 61162-1) • NMEA 2000: Micro-C 5-pin interface • USB: USB 2.0 Type-B
RF & Data Connectors	• VHF Antenna & Radio Ports: SO239 UHF Female (PL259 Compatible) • GPS Antenna Port: TNC Female (50 Ohm) • NMEA 0183 Data: 9-pin D-sub Connector • NMEA 2000: 5-pin Micro-C Connector • USB: USB 2.0 Type-B Connector • Power: 2-core captive power cable
Status Indicators	Discrete LEDs: On, TX, RX, Status, TX Timeout, Error, TX Off
Enclosure Material	Compact Extruded Aluminium Alloy Housing
Country of Origin	United Kingdom (UK)
Operating Temperature	-15°C to +55°C (5°F to 131°F)
Waterproof Rating	IP40 (Below-Deck / Cabin Installation)
Compass Safe Distance	50 cm
Type Approvals & Standards	IEC 62287-2 Class B SOTDMA, EN 60945, IEC 61162-1, IEC 61108-1, ITU-R M.1371-5, CE
Dimensions & Weight	Length: 135 mm, Width: 128 mm, Height: 50 mm (excl. connectors & bracket); Weight: 600 g