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Em-Trak B924 CLASS B I - User Manual

Em-Trak B924 CLASS B I
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I Certified AIS Class B – 2W CSTDMA
I Integrated WiFi and Bluetooth
I Integrated VHF antenna splitter
I Global Certification - USCG / FCC / Canada / Europe
I SRT-AIS
Transceiver Engine for superlative
proven performance
I FLEXI-FIT
bracket system for easy, convenient and
secure installation
I Internal high-performance GPS receiver and antenna
(external antenna optional)
I Water, pressure spray and damp proof
(IPx7 & IPx6 Certified)
I Protected from vibration, shock and extreme temperatures
I Small and lightweight
I Ultra-low power consumption – best in class
I NMEA0183 & NMEA2000
I Automated health and performance monitoring
I Silent Mode (transmit-off) function
I Enhanced RF screening to protect against
electromagnetic interference
I Built-in power surge protection
The B924 is a standard transmit power
(2W CSTDMA) Class B AIS transceiver that is
small and lightweight, 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 lowest power consumption.
The B924 combines WiFi and Bluetooth for seamless
wireless connectivity and AIS data streaming to any
mobile device or PC, as well as a high performance
integrated VHF antenna splitter, which enables the
transceiver to share your existing VHF radio
antenna without any loss of performance and
fail-safe reliability. With built-in intelligent
connectivity, integrated next generation GPS
receiver & antenna and a unique FLEXI-FIT
bracket
system, safe and secure installation is simple.
DESCRIPTION
B924 CLASS B I AIS Transceiver
STANDARD POWER (2W CSTDMA)
FEATURES
EM-TRAK.COM
EU
EM-TRAK.COM
Product Code: 430-0007
2W/CS
TRANSMIT & RECEIVE
NMEA0183 & 2000
IP67
WATERPROOF
WiFiBLUETOOTH
SPLITTER
GPS

Questions and Answers

  • L
    Leah BrownSep 4, 2025
    How to fix WiFi or Bluetooth connection issues on my Em-Trak B924 CLASS B I Transceiver?
    • F
      Felicia MichaelSep 4, 2025
      If you can't establish a connection using WiFi or Bluetooth with your Em-Trak Transceiver, check that the transceiver is powered by 12 - 24V. Also, check the configuration parameters using proAIS2. Ensure there are no obstructions between the transceiver and your mobile device and that there are no sources of interference nearby.
  • C
    Craig TurnerSep 18, 2025
    What to do if no LED indicators are illuminated on my Em-Trak Transceiver?
    • C
      crystal66Sep 18, 2025
      If no LED indicators are illuminated on your Em-Trak Transceiver, check that the power supply is connected correctly and that it is a 12V or 24V supply.
  • B
    Brian DaySep 16, 2025
    Why is the amber LED indicator flashing continuously on my Em-Trak Transceiver?
    • D
      Dominique HurstSep 16, 2025
      The amber LED indicator flashes on the Em-Trak transceiver while it searches for a position fix. If this takes longer than a minute, check the GPS antenna performance using the configuration tools.
  • E
    Erica KaneSep 14, 2025
    What to do if Em-Trak Transceiver data is not being received by the chart plotter?
    • A
      angelathompsonSep 14, 2025
      If your Em-Trak Transceiver is not sending data to the chart plotter, verify that the signal wires are correctly connected, the baud rate matches on both the transceiver and the chart plotter, and other vessels are within radio range and displayed on the Other Vessels tab of proAIS2 or CONNECT-AIS.
  • G
    gregory35Sep 12, 2025
    How to fix Em-Trak Transceiver connection issues with WiFi or Bluetooth?
    • A
      Ashley ReyesSep 12, 2025
      If you can't establish a connection using WiFi or Bluetooth on your Em-Trak Transceiver, check that the transceiver is powered by 12 - 24V, review the configuration parameters using proAIS2, ensure there are no obstructions or sources of interference between the transceiver and your mobile device, confirm that the 5-minute Bluetooth pairing window hasn't expired (if it has, remove and reapply power, including USB), and verify you're not using Bluetooth with an Apple device.
  • M
    Michael GillSep 12, 2025
    Why is my Em-Trak Transceiver vessel name not being received by other vessels?
    • M
      Melissa Davis PhDSep 12, 2025
      If your Em-Trak Transceiver isn't sending vessel name data to other vessels, remember that static data (including vessel name and call sign) transmits every 6 minutes. It might take a few transmissions before all data appears. Position reports with critical information like position, MMSI, and speed are sent more frequently.
  • O
    Olivia WyattSep 9, 2025
    How to troubleshoot no illuminated indicators on my Em-Trak Transceiver?
    • P
      Peter MolinaSep 9, 2025
      If no indicators are illuminated on your Em-Trak Transceiver, check that the power supply is connected correctly and that the power supply is a 12V or 24V supply.
  • B
    Brian JordanSep 7, 2025
    Why is my vessel name not being received by other vessels using my Em-Trak B924 CLASS B I?
    • E
      Elizabeth CaseSep 7, 2025
      If your vessel name isn't being received by other vessels from your Em-Trak Transceiver, note that static data (containing vessel name, call sign, etc.) is transmitted every 6 minutes, so it may take a few transmissions before all the vessel data is displayed. Position reports contain critical data like position, MMSI number, vessel speed, etc., and this is transmitted more regularly.
  • C
    Cynthia JohnsonSep 5, 2025
    Why is the amber indicator flashing continuously on my Em-Trak B924 CLASS B I?
    • M
      Margaret LongSep 5, 2025
      The amber indicator flashes on your Em-Trak Transceiver while the transceiver searches for a position fix. If it takes longer than a minute, you can check the performance of the GNSS antenna by using the GNSS Status tab of proAIS2.
  • G
    grayryanAug 20, 2025
    What to do if the red error LED indicator is flashing on my Em-Trak B924 CLASS B I?
    • K
      Kimberly WaltersAug 21, 2025
      If the red error LED is flashing, there may be a problem with the VHF antenna system, which can be confirmed using proAIS2. Check for a faulty VHF antenna, cable, or connectors, and ensure they are properly connected. Confirm the suitability of the VHF antenna (for AIS only, use antennas covering 162MHz; for splitter variants, use antennas covering to 159MHz). Also, check the VHF antenna location, ensuring it isn't mounted near other transmitting antennas, sources of interference, metal structures, or other obstructions.

Overview

The em-trak B924 is a standard power (2W CSTDMA) Class B AIS transceiver designed for marine use, offering comprehensive AIS data reception and transmission with advanced connectivity and robust performance.

Function Description:

The B924 is a Class B AIS transceiver that transmits at 2W CSTDMA, enabling it to send and receive AIS information and targets over maximum ranges while maintaining low power consumption. It integrates WiFi and Bluetooth for seamless wireless connectivity, allowing AIS data to be streamed to mobile devices or PCs. A high-performance integrated VHF antenna splitter is included, which allows the transceiver to share an existing VHF radio antenna without performance loss or reliability issues. The device features built-in intelligent connectivity, a next-generation GPS receiver and antenna (with an option for an external antenna), and a unique FLEXI-FIT™ bracket system for simple and secure installation. It is designed to be water, pressure spray, and damp proof, protected from vibration, shock, and extreme temperatures, making it suitable for harsh marine environments. The B924 also includes automated health and performance monitoring, a silent mode (transmit-off) function, enhanced RF screening, and built-in power surge protection.

Important Technical Specifications:

Physical Specification:

  • Size: 150 x 110 mm
  • Weight: 370g

Electrical Specification:

  • Power Supply: 12-24V DC
  • Power Consumption (WiFi & Bluetooth On): 3.35W (280mA @ 12V)
  • Power Consumption (WiFi & Bluetooth Off): 2.95W (245mA @ 12V)
  • Galvanic Isolation: NMEA0183 Inputs Only

Connectors:

  • VHF Antenna Output: SO239
  • VHF Radio Input: SO239
  • GNSS Antenna: TNC
  • NMEA2000: Standard 5 Way Micro Connector
  • Power/NMEA0183: 12 Way Circular Multipole
  • USB: Micro B

Data Interfaces:

  • Physical Data Interfaces: NMEA0183 (2), NMEA2000, USB
  • WiFi Type: IEEE 802.11 (a/b/g)
  • Bluetooth Type: BLE 4.0 Classic

VHF Transceiver:

  • Access Scheme: CSTDMA
  • Operating Frequency Range: 156MHz To 163MHz
  • AIS Receiver Sensitivity: -111dBm
  • AIS Transmit Power: 2W (+33dBm)

GNSS Receiver & Antenna:

  • Channels: 72
  • GNSS Type & Performance: GPS/Galileo + GLONASS Or BEIDOU

Environmental Standard:

  • Category: Exposed
  • Waterproofing: IPx6 & IPx7
  • Operating Temperature: -25°c To +55°c

Antenna Splitter:

  • VHF Radio Transmit Path Loss: < 1dB
  • Receive Path Loss: 0dB
  • Path Switching Time: < 10us
  • VHF Radio Path Rating: > 25W
  • Path On Power Failure: VHF to Antenna
  • Antenna Fault Detection: Yes
  • Switch Type: Solid-state

Standards Compliance:

  • AIS Standards: IEC62287-1 Ed 3, ITU-R M.1371-5
  • Product Safety Standards: EN60950-1 2006 (+A11:2009, +A1:2010, +A12:2011, +A2:2013), EN62311:2008, CFR 47 PT1.1310 (2016), Health Canada Safety Code 6, ARPANSA Radiation Protection Series No.3
  • Environmental Standard: IEC60945 Ed 4
  • Serial Data Interface Standards: IEC61162-1 Ed 5.0, IEC61162-2 Ed 1.0
  • GNSS Performance Standards: IEC61108-1 Ed 2.0, IEC61108-02 Ed 1.0
  • NMEA2000 Interface Standard: NMEA2000 Ed 3.101

Usage Features:

  • Wireless Connectivity: Integrated WiFi and Bluetooth allow for easy streaming of AIS data to mobile devices (smartphones, tablets) and PCs, enhancing navigation and situational awareness.
  • Integrated VHF Antenna Splitter: This feature eliminates the need for a separate VHF antenna for the AIS transceiver, allowing it to share the existing VHF radio antenna without any performance degradation or reliability concerns. This simplifies installation and reduces clutter.
  • FLEXI-FIT™ Bracket System: Designed for easy, convenient, and secure installation, making the setup process straightforward for users.
  • Next-Generation GPS Receiver & Antenna: Provides accurate positioning data, essential for AIS functionality. An option for an external antenna is available for enhanced signal reception if needed.
  • NMEA0183 & NMEA2000 Connectivity: Ensures compatibility with a wide range of marine electronics, allowing seamless integration into existing navigation systems like chartplotters.
  • Silent Mode (Transmit-Off): Allows the user to disable AIS transmission when privacy or discretion is required, while still receiving AIS data.
  • Ultra-Low Power Consumption: Best in class, ensuring minimal drain on the vessel's power supply, which is crucial for extended voyages.
  • Global Certification: Certified by major regulatory bodies including USCG / FCC / Canada / Europe, ensuring compliance and reliability worldwide.
  • SRT-AIS™ Transceiver Engine: Utilizes advanced technology for superlative and proven performance in AIS data processing.

Maintenance Features:

  • Automated Health and Performance Monitoring: The device continuously monitors its own operational status and performance, providing alerts or indications if any issues arise, which aids in proactive maintenance.
  • Robust Construction: Certified IPx7 and IPx6 for water, pressure spray, and damp proofing, and protected from vibration, shock, and extreme temperatures. This durability minimizes the need for frequent repairs or replacements due to environmental factors.
  • Enhanced RF Screening: Protects the device against electromagnetic interference, ensuring stable and reliable operation in environments with other electronic equipment.
  • Built-in Power Surge Protection: Safeguards the transceiver from electrical spikes, extending its lifespan and reducing the risk of damage from power fluctuations.
  • Three-Year Global Warranty: Em-trak provides a comprehensive warranty, offering support and repair or replacement services in the unlikely event of a product problem, provided the product has not been incorrectly used, damaged, or tampered with. This commitment to customer support ensures peace of mind for users.

Em-Trak B924 CLASS B I Specifications

General IconGeneral
BrandEm-Trak
ModelB924 CLASS B I
CategoryTransceiver
LanguageEnglish

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