- viii - 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
CAUTION 
When setting a guard zone, make sure to properly adjust 
gain, sea-surface reflection suppression level, and 
rain/snow reflection suppression level so that the optimal 
target images are always on the radar screen.    The guard 
zone alarm will not be activated for targets undetected by 
the radar, and it may result in accidents such as 
collisions. 
The simulation function is used exclusively for deciding 
whether or not ATA is properly operating.    Therefore, 
never use this function unless you wish to check ATA 
operations. 
Note especially that, if this function is used during actual 
navigation, simulated targets are displayed and may 
become confused with other actual targets.    Therefore, 
never use this function during actual navigation. 
Optimal values have been set for VD LEVEL and 
CONSTANT; therefore, never change their values unless 
absolutely necessary.    Failure to comply may result in 
accidents that would lower ATA performance. 
Make sure to shut off the main power before replacing 
parts.    Failure to comply may result in electrocution or 
equipment failure. 
When replacing magnetrons, make sure to shut off the 
main power and let the equipment stand for more than 5 
minutes to discharge the high-voltage circuit.    Failure to 
comply may result in electrocution.