Icom MA500TR Class B AIS Transponder
Designed for Non-SOLAS vessels such as pleasure craft, workboats and small vessels, the MA-500TR is a compact, waterproof Class B AIS transponder that actively notifies other vessels of your exact position, thus increasing your safety at sea. The MA-500TR also has a dual channel receiver allowing boat owners to receive AIS information (both Class A and Class B AIS signals) on two channels simultaneously. This real-time information is then displayed on its large, backlit full dot-matrix display giving the boat owner real-time vessel traffic information thus aiding navigation and collision avoidance. The MA-500TR can work independently or connect with a PC or other marine network equipment. When connected to a compatible Icom VHF radio , an individual DSC call can be made easily from the MA-500TR. Vessel information is automatically transmitted with 30 second or 3 minutes intervals at 2W output power depending on the movement/speed of the vessel. The MA-500TR receives dual AIS channels (Ch. 87B and Ch. 88B) simultaneously and receives both Class A and Class B AIS information.
Transmitted information with MA-500TR
Type of ship
GPS antenna position
SOG (Speed over ground)
COG (Course over ground)
UTC date and time
GPS antenna type (Internal/external)
PA (Position Accuracy)
Plotter Display similar to marine radar display. Supports north-up and course up and range zoom from 0.125 NM to 24 NM.
Target List Display shows all detected AIS equipped vessels and targets.
Danger List Display shows a list of vessels which are within 6 NM CPA and 60 minutes TCPA from your vessel.
CPA and TCPA for collision-risk management
When a vessel comes into the CPA and TCPA range, the vessel icon blinks on either the plotter display and emits a beep sound. When connected to external audio equipment the collision alarm gives the boat-owner extra warning of potential impact.
100 waypoints memory
Can store up to 100 waypoints with a10-character name in the waypoint list. The Man Over Board MOB button allows you to set a waypoint on your current position instantly on the plotter display.
Safety-related message reception
When the MA-500TR receives a safety-related message from a Class A AIS transponder, the message icon appears on the plotter display and the MA-500TR automatically stores the last 20 messages.
Full dot-matrix display
128mm x128mm dot-matrix large display
Real-time traffic information
Works independently from a PC or other marine network equipment.
The display has adjustable backlight and contrast
IPX7 waterproof protection
Waterproof protection equivalent to the IPX7 standard (Except connectors).
Can withstand submersion in one metre of water for up to thirty minutes.
3-line NMEA input/output
The MA-500TR has 15-pin D-SUB connector providing 3-lines of NMEA input/output on the rear panel.
12 channel parallel GPS receiver with SBAS (Satellite Based Augmentation System) function.
POS (position) smoothing and SOG (speed over ground) smoothing adjustment can be set for the vessel position and speed information.
The GPS receiver is tested to and has passed the IEC 60945 exposed environmental test standard.
Self diagnostics function (Monitor test and transponder test)
Flush mount installation with optional MB-75 flush mount kit