Furuno COLOR VIDEO PLOTTER 1833C Operator's Manual page 235

APPENDIX
Sounder
OFF
AUTO
OFF
ON
1
OFF
1/1
OFF
OFF
MEDIUM
ON
3
3
0
0
0
0
INTERNAL
SM3,
ON
0%
0 F
0 ft
0 m/s
10 m 30 ft 10 fa 10 P/B
6 m 20 ft 3 fa 3 P/B
A-8