AMEC B650W Class B SOTDMA AIS Transponder with Wi-Fi
The AMEC B650W combines 5W Class B SOTDMA AIS performance with built-in Wi-Fi connectivity in one compact, rugged package.
Designed for cruisers, sailors, and modern navigation systems, the B650W enables wireless AIS data streaming to compatible charting apps, tablets, smartphones, and PCs while maintaining a dedicated AIS antenna installation for maximum installation flexibility.
- 5W Class B SOTDMA AIS transponder
- Built-in Wi-Fi connectivity
- Wireless AIS data streaming to compatible mobile devices
- Low average current draw for continuous operation
Built on SOTDMA (Self-Organized Time Division Multiple Access) technology, the B650W provides faster and more reliable transmission performance compared to traditional Class B CSTDMA systems. This helps improve vessel visibility and tracking accuracy, especially in congested waterways and high-traffic AIS environments.
The B650W supports both NMEA 0183 and NMEA 2000 connectivity, along with USB-C configuration and data access. With multi-constellation GNSS support, rugged IP68 protection, and flexible onboard integration options, it is well suited for modern recreational and light commercial vessels.
Technology Overview
SOTDMA technology allows the B650W to reserve AIS transmission slots in advance, providing more predictable and dependable AIS broadcasts than legacy Class B systems. This is especially valuable in busy harbors, narrow waterways, and offshore traffic zones where reliable AIS visibility matters.
Key Features
- 5W Class B SOTDMA AIS transponder for enhanced transmission performance
- Built-in Wi-Fi connectivity for wireless AIS data streaming
- Supports Access Point and Client Wi-Fi modes
- Faster and more reliable reporting than Class B CSTDMA systems
- Improved target tracking in high-traffic AIS environments
- Integrated high-sensitivity GNSS receiver
- Optional external GPS antenna available here
- NMEA 0183 and NMEA 2000 connectivity
- USB-C interface for configuration and diagnostics
- Compact, low-power design for continuous operation
Applications
- Recreational cruising vessels
- Sailboats and power-conscious offshore cruisers
- Coastal and offshore passagemaking
- Fishing and sailing vessels
- Tablet- and app-based navigation systems
- Workboats and light commercial applications
- Fleet tracking and AIS monitoring
Top Specifications – B650W
- 5W Class B SOTDMA AIS transponder (37 dBm nominal output)
- Built-in Wi-Fi (IEEE 802.11 b/g/n)
- Supports up to 2 devices in Access Point mode
- Low power consumption: 160 mA average / 1.8 A peak @ 12V DC
- Wide input voltage range: 9.6 – 31.2 V DC (12V / 24V systems)
- Dual AIS receivers with high sensitivity (< -111 dBm)
- Multi-constellation GNSS support: GPS, Galileo, BeiDou, GLONASS
- 72-channel GNSS receiver with approx. 2.5 m horizontal positioning accuracy
- NMEA 2000 Version 3.0, LEN=1
- Dual NMEA 0183 bi-directional ports
- USB-C interface for configuration and data output
- IP68 waterproof and dust-resistant housing
- Compact form factor: 151.22 x 128.57 x 49.87 mm, 400 g
