1-1
1.1   FUNCTIONS 
 
This equipment is a high-performance radar equipment consisting of a scanner unit, a 
transmitter-receiver unit and a high resolution color LCD display unit. 
This equipment complies with the performance standard of IMO. 
 
 
1.1.1    Function of This System 
 
The JMA-900B series is a color radar system designed to comply with the international standards 
of the IMO. 
The main functions include: 
 
• sensitivity adjustment 
•  sea clutter and rain/snow clutter suppression 
• interference rejection 
•  bearing and range measurement using a cursor, fixed/variable range markers, and electronic 
bearing line 
•  colored own track display(7 colors) 
•  NAV line and marker displays 
•  TM (True Motion) presentation 
• self-diagnostic facilities 
•  radar performance monitoring (Performance Monitor) 
•  Target Tracking functions (manual/automatic, target acquisition and tracking, vector and trail 
displays, Trial maneuver and alarm displays) 
•  8-unit switchover (Inter switch) function (option) 
•  Electronic navigational chart display function 
•  RADAR mode/ECDIS mode display change function (*) 
 
 
* Refer to this manual for the RADAR mode functions and operations. 
There is a separate ECDIS mode manual for CHART functions. 
During Chart-Radar operation the ECDIS functions are slightly amended compared to the comparable 
JRC ECDIS only model JAN-901B/JAN-701B.