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PREFACE 
 
Thank you for purchasing the JRC JMA-900B Chart RADAR. 
This manual describes how to install the equipment. For the best operation and 
performance results, read this manual thoroughly before insallation. 
For preventing electric shock and for securing periformance, grounding work is 
needed. 
Make sure to perform earth connection. 
For the detailed operation, refer to the Instruction Manulal for JMA-900B.