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em-trak B921 Class B AIS Transceiver – 2W CSTDMA
The em-trak B921 Class B AIS Transceiver delivers reliable 2W CSTDMA transmission for US recreational boaters, featuring a compact “bolt-on” bracket for rapid installation in tight spaces.
- Transmission Type: 2-Watt CSTDMA Class B Logic
- Network Protocol: NMEA 2000, NMEA 0183, and USB Interface
- Integrated GPS: 72-Channel High-Performance GNSS Receiver
- Power Usage: Ultra-Low Current Consumption Design
- Housing Grade: IP66 and IP67 Rated Waterproofing
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Description
em-trak B921 | Class B AIS Transceiver & 2W CSTDMA Logic
Engineered to overcome coastal collision risks, the em-trak B921 is a compact 2W CSTDMA Class B AIS transceiver that offers reliable position reporting in a small, energy-efficient package. This unit utilizes the latest AIS technology to ensure your vessel is visible to all Class A and Class B receivers, providing peace of mind during night passages or in restricted visibility conditions.
Tailored for smaller powerboats and sailing yachts, the B921 features an internal GPS antenna for simplified installation in many deck-mounted scenarios. Strategic routing of the VHF cable to avoid sharp bends is critical to minimizing signal loss, ensuring the 2W transmission reaches its maximum effective range across the water.
Technical Key Features
- 2W CSTDMA Class B AIS transmission.
- Internal GPS antenna simplifies system setup.
- NMEA 2000 and NMEA 0183 connectivity.
- Low-power consumption for 12V/24V systems.
- IPx6 and IPx7 rated waterproof housing.
- Small footprint for versatile mounting options.
- Compatible with all major chartplotter brands.
EM-TRAK B921 Class B AIS Transceiver - 2W CSTDMA Specifications
| Communication Type | Class B AIS Transceiver (Standard) |
| AIS Class/Protocol | CSTDMA (Carrier Sense) |
| Output Power | 2W Output Capacity |
| Frequency Range | 156.025 – 162.025 MHz |
| Reporting Rate | 30 Sec to 3 Min (Speed Dependent) |
| Operating Voltage | 12V / 24V DC Support |
| Current Draw | < 170mA @ 12V Average |
| Interface/Networking | NMEA 2000, NMEA 0183, USB Interface |
| Internal GPS | 72-Channel High-Sensitivity Receiver |
| Display Type | Multi-Color LED Status System |
| Waterproof Rating | IP67 & IP66 Rated Protection |
| Operating Temperature | -25°C to +55°C Marine Grade |
| Length (Overall) | 150 mm (5.9") Compact Housing |
| Width/Diameter | 110 mm (4.3") Width |
| Weight | 0.35 kg (0.77 lbs) |
| Included Accessories | Power/Data Cable, Mounting Bracket |
| Key Mechanical Feature | Ultra-low power consumption for small vessels |
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