Em-Trak B921 Installation And Operation Manual

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AIS Class B transceiver

Installation and operation manual

Table of Contents

Other manuals for Em-Trak B921

User Manual56 pages

Installation Guide3 pages

Quick Start Guide2 pages

Questions and Answers:

B
Benjamin DavisSep 7, 2025
Why is my vessel name not being received by other vessels using my Em-Trak B921 Transceiver?
- C
  Christopher TranSep 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.
M
michelledouglasSep 9, 2025
How to troubleshoot no illuminated indicators on my Em-Trak B921 Transceiver?
- M
  Michael BurchSep 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.
M
Megan DawsonSep 12, 2025
Why is my Em-Trak Transceiver vessel name not being received by other vessels?
- E
  emooreSep 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.
D
Donna DuranSep 12, 2025
How to fix Em-Trak Transceiver connection issues with WiFi or Bluetooth?
- J
  Jose WestSep 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.
J
jonesaaronSep 14, 2025
What to do if Em-Trak Transceiver data is not being received by the chart plotter?
- A
  Adrienne HoSep 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.

Em-Trak B921 Specifications

General

AIS Class	Class B
Frequency Range	156.025 MHz - 162.025 MHz
Output Power	2W
Waterproof	IPx7
Modulation	GMSK
Type	AIS Transceiver
Frequency	161.975 MHz, 162.025 MHz
Voltage	9 - 32 V DC
Interfaces	NMEA 0183, USB
Power Supply	9 - 32 V DC
Interface	NMEA 0183
Operating Temperature	-15°C to +55°C
Certifications	CE, FCC
GPS Receiver	Built-in

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