Furuno 1834C-BB User Manual

2. RADAR OPERATION 

 When the watchman is activated and no guard zone is active, the message “PLEASE 

SET GUARD ZONE. PUSH ANY KEY TO CONTINUE.” appears. Press any key and then 
set a guard zone. 

 

.23.3  Setting watchman stand-by interval 

The watchman standby interval, that is, the number of minutes the radar is in standby, can 
be set to 5, 10 or 20 minutes as follows: 
 
1. Press the MENU key. 
2.  Press the A: RADAR DISPLAY SETUP soft key. 
3.  Select WATCHMAN TIME, then press the A: EDIT soft key. 

WATCHMAN

 TIME

  5 minutes
10

 minutes

20

 minutes

4.  Select time desired, then press the C: ENTER soft key. 
5. Press the MENU key to close the menu. 
 
 

In certain situations, echoes from very distance targets may appear as false echoes 
(second-trace echoes) on the screen. This occurs when the return echo is received one 
transmission cycle later, or after a next radar pulse has been transmitted. 

Second-trace
echo

Tx repetition

Actual range

False echo
range

To activate or deactivate the second-trace echo rejector do the following: 
 
1. Press the MENU key. 
2.  Press the A: RADAR DISPLAY SETUP soft key. 
3. Use the Trackball to select 2ND ECHO REJECTION, then press the A: EDIT soft key. 
4.  Choose ON or OFF as appropriate, then press the C: ENTER soft key. 
5. Press the MENU key to close the menu.