Furuno FCR-21x9-BB Operator's Manual page 392

APPENDIX 2 ABBREVIATIONS, SYMBOLS
Symbol name and description
Velocity vector - time increments
Velocity vector - stabilization indicator
Ground stabilization is indicated by double arrow-
head and water stabilization is indicated as single
arrowhead.
Past track
System past track is indicated by thick line. Raw
sensor primary past track is indicated by thin line.
Raw sensor secondary past track is indicated by
grey thin line.
Radar targets in acquisition state
Radar targets in acquisition state - automatically
detected
Automatically detected target symbol is red and it
flashes until acknowledged.
Tracked radar targets
Tracked radar targets - dangerous targets
Dangerous target symbol is red and it flashes until
acknowledged.
Reference targets
TT: Std or small user selection by Symbol Display.
AP-14
Symbol graphic(s)
5 mm in diameter
5 mm in diameter
18
3 mm in diameter
18
R4 18